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Naien Shi, Gui Yin, Min Han, Zheng Xu, Xin Fan, Hongbian Li, Jianming ...
2005 Volume 34 Issue 11 Pages
1468-1469
Published: 2005
Released on J-STAGE: September 28, 2005
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Supplementary material
We report a facile method for self-assembling Au nanoparticles and tetrapyridylporphine into composite hollow spheres at the water/oil interface driven by coordination interaction between them. The interaction was studied by X-ray photoelectron spectroscopy, FT-IR spectroscopy, UV–vis spectroscopy, and fluorescence spectroscopy.
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Kensuke Tono, Junichi Ikeuchi, Hiroshi Kondoh, Toshiaki Ohta
2005 Volume 34 Issue 11 Pages
1470-1471
Published: 2005
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Electronic property of hydrogen adatoms on a carbide-modified W(110) surface, W(110)(15 × 3)R14°-C, was investigated by means of angle-resolved photoelectron spectroscopy. The work function of the surface decreases anomalously with hydrogen exposure. The hydrogen adatom polarizes positively due to bond formation with surface carbon atoms, resulting in the work-function decrease by as large as 1.0 ± 0.1 eV at saturation.
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Akimasa Nakamura, Shinji Mizoguchi, Emi Yoshida, Yuki Kato, Tadashi Wa ...
2005 Volume 34 Issue 11 Pages
1472-1473
Published: 2005
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To expand the spectral window for the light-induced charge separation in photosystem (PS) I of oxygenic photosynthetic organisms artificially, Rhodamine B (RhB) was covalently linked to the solution-exposed surfaces of PS I. By introduction of RhB to PS I, the activity of light-induced charge separation for excitation wavelength at which the light absorption is dominated by RhB increased by about 1.8-fold, showing that RhB covalently attached to PS I can serve as the artificial light-harvesting antenna.
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Masahiko Iyoda, Mohammad Jalilur Rahman, Aoi Matsumoto, Mo Wu, Yoshiyu ...
2005 Volume 34 Issue 11 Pages
1474-1475
Published: 2005
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Nonaphenylene and its hexaalkyl derivatives have been synthesized using electron-transfer oxidation of Lipshutz cuprates with duroquinone. Oxidation of the Lipshutz cuprate derived from dibromo-
o-terphenyl in THF produced nonaphenylene in moderate yield, whereas the similar oxidation of the Lipshutz cuprate derived from diiododiethyl-
o-terphenyl in ether afforded the corresponding nonaphenylene and dodecaphenylene. Furthermore, oxidation of Lipshutz cuprate derived from diiododibutyl-
o-terphenyl only gave the nonaphenylene.
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Toshiaki Suzuki, Akira Shibata, Naoya Morohashi, Yoshihiro Ohba
2005 Volume 34 Issue 11 Pages
1476-1477
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Direct diazidation of α-pinene (
1) followed by reduction gave two novel 1,2-diamines (
2a and
2b) whose absolute configuration were determined by 2D
1H NMR and X-ray crystallography.
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Tatsuya Kitagawa, Reiko Iwase, Kazuhiko Ishihara, Tetsuji Yamaoka, Aki ...
2005 Volume 34 Issue 11 Pages
1478-1479
Published: 2005
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Amphiphilic polycations, p(DMAPAA-
co-MPC-
co-SA)s, with various cation contents were designed as novel micelle-like nonviral gene carriers. The carriers led to a higher transgene expression in COS-1 cells three times as high as the case of the linear-type polycations. The enhanced transgene expressions were found to be related to the disassembly of plasmid DNA/carrier polyplexes. It can be concluded that a topological factor of the carriers greatly influences on the gene expression efficiency.
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Tamio Hayashi, Norihito Tokunaga, Kazuhiro Okamoto, Ryo Shintani
2005 Volume 34 Issue 11 Pages
1480-1481
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Supplementary material
Asymmetric 1,4-addition of arylboronic acids to α,β-unsaturated aldehydes proceeded in the presence of a rhodium catalyst (3 mol %) coordinated with a chiral diene ligand ((
R,
R)-Bn-bod
*) to give the corresponding β-arylaldehydes with perfect 1,4-selectivity and with 88–97% enantioselectivity.
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Jian-wei Zhao, Chang-hui Ye, Xiao-sheng Fang, Peng Yan, Li-de Zhang
2005 Volume 34 Issue 11 Pages
1482-1483
Published: 2005
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Using a simple assistant thermal decomposition method, metal cadmium nanowires were large-scale fabricated from CdS powders in an argon atmosphere. Investigation results demonstrate that the Cd nanowires have lengths of several microns and diameter of about 70–150 nm.
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Jin Matsumoto, Tomokazu Fuchikawa, Yasuhiro Komiya, Yoshiyuki Fueda, T ...
2005 Volume 34 Issue 11 Pages
1484-1485
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Supplementary material
Dihydroxoantimony(V) tetraphenylporphyrin chromophore (SbTPP) was immobilized on 3-aminopropyl-silica gel (NH
2–SiO
2) by the reaction of dihydroxoantimony [4-(
N-succinimidyloxycarbonyl)phenyl]triphenylporphyrin with NH
2–SiO
2. Spectroscopic analysis of the complex by confocal laser scanning microscope suggested the interaction of SbTPP with the residual amino group on SiO
2. The photoreaction of the complex with Et
2NH induced the demetallation.
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Ichiro Yamanaka, Toshikazu Gomi, Takashi Nabeta, Kiyoshi Otsuka
2005 Volume 34 Issue 11 Pages
1486-1487
Published: 2005
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Alkane was efficiently oxidized to alcohol and ketone with O
2 and H
2 by EuCl
3–TiO(acac)
2–Pt/SiO
2 catalytic system with very high H
2-utilization efficiencies, 75% for adamantane and 60% for cyclohexane oxidations. ESR studies suggested that electrons originated in H
2 effectively conducted to O
2 through Pt, Eu
3+/Eu
2+, and Ti
4+/Ti
3+. Eu
2+ and Ti
3+ species reductively activated O
2, generating active oxygen species.
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Xingfei Zhou, Hui Xu, Chunhai Fan, Jielin Sun, Yi Zhang, Minqian Li, W ...
2005 Volume 34 Issue 11 Pages
1488-1489
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Supplementary material
A water-soluble conjugated polymer, poly[lithium 5-methoxy-2-(4-sulfobutoxy)-1,4-phenylenevinylene] (MBL-PPV), spontaneously forms nanoparticles at flat mica surfaces. In this work, we manipulated single PPV nanoparticles with a modified version of AFM, our recently developed vibrating scanning polarization force microscopy (VSPFM). VSPFM provides a new way to obtain undistorted imaging of “soft” molecules at surfaces. We have demonstrated that we could stepwise compress a single PPV nanoparticle with an AFM tip and estimate its compression elasticity in a small force regime.
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Ryo Sasai, Takanori Itoh, Nobuo Iyi, Katsuhiko Takagi, Hideaki Itoh
2005 Volume 34 Issue 11 Pages
1490-1491
Published: 2005
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To develop solid materials with high luminescence, the preparation of laser-dye rhodamine 6G (R6G)/clay hybrid thin solid films with surfactant molecules as aggregation suppressors was investigated. Dodecyltrimethylammonium cations were found to be very effective for inhibiting dye aggregation in the clay interlayer space. Consequently, this material showed light emission from the R6G monomer.
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Biswanath Das, Anjoy Majhi, Joydeep Banerjee, Nikhil Chowdhury, Katta ...
2005 Volume 34 Issue 11 Pages
1492-1493
Published: 2005
Released on J-STAGE: October 01, 2005
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Supplementary material
The stereoselective synthesis of trisubstituted alkenes containing a benzyl substituent has been achieved by employing Friedel–Craft reaction of aromatic compounds with unactivated Baylis–Hillman adducts in the presence of Fe
3+-K-10 montmorillonite clay as a heterogeneous catalyst. The catalyst can be recovered and reused.
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Ponnusamy Shanmugam, Paramasivan Rajasingh
2005 Volume 34 Issue 11 Pages
1494-1495
Published: 2005
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An eco-friend method for the synthesis of 1-aryl indenes from Baylis–Hillman adducts using Mont. K10 and microwave combination as catalyst system and a procedure for the synthesis of β-phenyl-substituted-protected Baylis–Hillman adducts with highly
Z-selectivity have been reported.
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Kazuhiro Ikegai, Teruaki Mukaiyama
2005 Volume 34 Issue 11 Pages
1496-1497
Published: 2005
Released on J-STAGE: October 01, 2005
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Supplementary material
An efficient method for the synthesis of
N-aryl pyridin-2-ones was established by way of ligand coupling reactions using pentavalent organobismuth reagents such as triarylbismuth dichlorides.
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Tetsu Yonezawa, Shin-ya Onoue, Nobuo Kimizuka
2005 Volume 34 Issue 11 Pages
1498-1499
Published: 2005
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The surface of tobacco mosaic virus (TMV) is densely coated by quaternary ammonium-modified gold nanoparticles. By dropping gold nanoparticle dispersions onto TMV pre-cast substrates (“after-staining method”), nanoparticles are spontaneously adsorbed on TMVs. The adsorbed nanoparticles were fused to form semi-continuous structures. This observation indicates the possibility of preparing 1-D arrays from wide variety of nanosized materials, by using TMV tubules as templates.
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Avijit Banerji, Debasish Bandyopadhyay, Bidyut Basak, Pizush Kanti Bis ...
2005 Volume 34 Issue 11 Pages
1500-1501
Published: 2005
Released on J-STAGE: October 15, 2005
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A straightforward, easy and smooth process of synthesizing indolo[2,3-
a]carbazoles, which can frequently serve as a nucleus of several natural products is reported. The process involves only two steps viz. single electron transfer reaction and subsequent reductive cyclization with hydrazine.
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Kshudiram Mantri, Ryo Nakamura, Kenichi Komura, Yoshihiro Sugi
2005 Volume 34 Issue 11 Pages
1502-1503
Published: 2005
Released on J-STAGE: October 08, 2005
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Some typical multi-valent metal salts, such as chloride, nitrate, sulfate, and acetate of Fe(III), Al(III), Ga(III), In(III), Zr(IV), Hf(IV), Zn(II), Co(II), Ni(II), Mn(III), Cr(III), and Cu(II) have catalytic acitivties for the esterification of saturated and unsaturated long chain aliphatic acids with long chain aliphatic alcohols. These catalysts were sponteneously separated from the reaction mixtures, and could be subjected to the recycle use for the further reactions.
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Martha Elena Alcántara-Garduño, Tetsuji Okuda, Wataru Ni ...
2005 Volume 34 Issue 11 Pages
1504-1505
Published: 2005
Released on J-STAGE: October 22, 2005
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A new technique for rapid and complete removal of trichloroethylene (TCE) from porous media was developed on the basis of chemical decomposition by ozone added to flushing solvent. The rate of TCE removal by the combination process of ozone with acetic acid flushing was from 1.2 to 2.5 times as high as the flushing process without ozone due to the chemical decomposition of TCE not only dissolved in the solution but also adsorbed on the porous media.
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Jinting Jiu, Fumin Wang, Seiji Isoda, Motonari Adachi
2005 Volume 34 Issue 11 Pages
1506-1507
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Supplementary material
Single crystalline anatase TiO
2 nanorods were successfully synthesized by surfactant-assisted hydrothermal method. A high light-to-electricity conversion yield of 7.06% was achieved by applying the TiO
2 nanorods as thin film of dye-sensitized solar cells.
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Yoshikazu Kawano, Nobuya Kaneko, Teruaki Mukaiyama
2005 Volume 34 Issue 11 Pages
1508-1509
Published: 2005
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Catalytic cyanomethylation of various carbonyl compounds with (trimethylsilyl)acetonitrile (TMSCH
2CN) in the presence of Lewis bases such as cesium or lithium acetate proceeded smoothly to afford the corresponding cyanomethylated adducts in good yields.
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Yoshinori Sakamoto, Kyosuke Nakamura, Rie Kushibiki, Yuichi Kamiya, To ...
2005 Volume 34 Issue 11 Pages
1510-1511
Published: 2005
Released on J-STAGE: November 05, 2005
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To purify water contaminated with nitrate, a two-stage process was employed, involving nitrate hydrogenation to nitrite in the first stage (pH = 10.5) using 0.87 wt% Cu–Pd (2:1) cluster/AC, and nitrite hydrogenation in the second stage (pH = 6.5) with 1.0 wt% Pd/β-zeolite. The nitrate (100 ppm) was hydrogenated rapidly, suppressing ammonia levels to within concentrations acceptable for drinking water.
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Limin Han, Jingyuan Chen, Isao Ikeda
2005 Volume 34 Issue 11 Pages
1512-1513
Published: 2005
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Supplementary material
The mono dispersed redox-active latex particle with 0.90 μm in diameter was prepared by immobilizing ferrocenylmethanol acrylate on a surface of a polystyrene latex core through the emulsion copolymerization reaction. The aqueous suspensions exhibited stable voltammetric waves at 0.271/0.207 V vs Ag|AgCl. The anodic and the cathodic peak currents were diffusion-controlled, as if it were huge redox molecules with 3.8 × 10
7 electrons.
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Jian Wang, Liyan Huang, Guonan Chen, Jinling Huang
2005 Volume 34 Issue 11 Pages
1514-1515
Published: 2005
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The sonochemiluminescence (SCL) of lucigenin in
N,
N-dimethylformamide was investigated. It is found that flavonoids can effectively inhibit this type of SCL and the inhibition of flavonoids parallel very well to their radical-scavenging capacity. These results provide useful data for establishing methods to assess the radical.
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Teruo Takahashi, Catalin Romeo Luculescu, Katsumi Uchida, Tadahiro Ish ...
2005 Volume 34 Issue 11 Pages
1516-1517
Published: 2005
Released on J-STAGE: October 08, 2005
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We found that the cationic polysaccharide chitosan is an efficient dispersion agent for single-walled carbon nanotubes (SWNTs). The spectroscopic properties of chitosan–SWNTs dispersion are different from sodium dodecyl sulfate (SDS)–SWNTs dispersion in acidic conditions. It has been revealed that chitosan is efficiently protective against the protonation of SWNTs. The dispersion behavior of SWNTs in chitosan solutions will be discussed.
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Masaharu Tsuji, Nobuhiro Miyamae, Kisei Matsumoto, Sachie Hikino, Take ...
2005 Volume 34 Issue 11 Pages
1518-1519
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Au core–Ag shell bimetallic nanoparticles, denoted as Au@Ag, have been prepared by a microwave(MW)-polyol method through the two-step reduction of AuCl
4− and Ag
+ ions in the presence of poly(vinylpyrrolidone) (PVP) as a capping reagent. When single crystal polygonal Au nanoplates and nanorods were used as seeds, a mixture of various Au@Ag core–shell nanostructures was prepared after MW heating for only 2 min. Among them, small amounts of novel polygonal and rod types of Au@Ag nanostructures, in which morphologies of Au core were conserved, were produced.
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Shigetaka Hayano, Yasuo Tsunogae
2005 Volume 34 Issue 11 Pages
1520-1521
Published: 2005
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Supplementary material
cis- and syndio-Specific ring-opening metathesis polymerization of
endo-dicyclopentadiene was achieved for the first time by the newly developed catalyst, W(=N-Ph)Cl
4·Et
2O–Et
2Al(OEt), to produce crystalline syndiotactic hydrogenated poly(
endo-dicyclopentadiene).
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Takashi Tachikawa, Tatsuto Yui, Mamoru Fujitsuka, Katsuhiko Takagi, Te ...
2005 Volume 34 Issue 11 Pages
1522-1523
Published: 2005
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The electron-transfer reaction in the composite films of a
meso-(tetramethylpyridinium)porphyrin (TMPyP)–mesoporous silica (MPS) (TMPyP–MPS) and a methyl viologen (MV
2+)–titania nanosheet (TN) (MV
2+–TN) was studied by nanosecond transient absorption measurements. The effects of the (TMPyP–MPS) layer on the one-electron reduction process of MV
2+ were examined.
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Masaki Matsuda, Jun-Ichi Yamaura, Hiroyuki Tajima, Tamotsu Inabe
2005 Volume 34 Issue 11 Pages
1524-1525
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Supplementary material
A manganese(III) complex salt, TPP[Mn
III(Pc)(CN)
2]·DCM was crystallized in dichloromethane solution (Pc = phthalocyaninato, TPP
+ = tetraphenylphosphonium, and DCM = dichloromethane). In the crystal, Pc molecules form a pair of one-dimensional regular chains along the
c axis. The magnetic susceptibility measurement revealed Mn ions in the low-spin state (
S = 1) and a spin–orbit coupling effect due to the incomplete quenching of the angular orbital moment under the symmetrical ligand field.
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Louisa J. Hope-Weeks
2005 Volume 34 Issue 11 Pages
1526-1527
Published: 2005
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Supplementary material
A room temperature solution phase preparation of germanium nanocrystals has been examined by means of varying the germanium precursor concentration. By varying the germanium tetrachloride concentration, it is possible to control the size distribution of nanocrystals formed.
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Jianqiang Yu, Akihiko Kudo
2005 Volume 34 Issue 11 Pages
1528-1529
Published: 2005
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Bi
2MoO
6 nanoplates with an Aurivillius structure and a uniform thickness of 15–30 nm were fabricated by a hydrothermal process at 413 K for 48 h with the assistance of the surfactant cetyltrimethylammonium bromide (CTAB). The nanoplate structure was favorable to the photocatalytic O
2-evolution performance under visible light irradiation.
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Katsuhiro Ueda, Tomoyuki Ueta, Eric Richard Oktavianus Siwu, Masaki Ki ...
2005 Volume 34 Issue 11 Pages
1530-1531
Published: 2005
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Haterumadienone (
1), a ring-contracted derivative of puupehenone (
2), was isolated from a sponge
Dysidea sp., along with the artificial acetone adducts
3 and
4 of a trione hydrate
5 which could be detected in the sponge. The structures of
1 and the acetone adducts
3 and
4 were successfully determined by detailed spectroscopic analysis. These compounds showed the ability to inhibit the division of fertilized sea urchin eggs.
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Chun Li, Munenori Numata, Teruaki Hasegawa, Tomohisa Fujisawa, Shuichi ...
2005 Volume 34 Issue 11 Pages
1532-1533
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Supplementary material
Chemical polymerization of 3,4-ethylenedioxythiophene (EDOT) in the presence of single-chain schizophyllan (s-SPG) gave water-soluble nanocomposites with the very uniform globular structure. The findings indicate that s-SPG is capable of acting not only as a one-dimensional host to create fibrous architectures but also as a neutral host to create nanoparticles. The mechanism is reasonably explained by the difference in the hydrophobicity of guest polymers or assemblies.
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Tomoki Fuji, Tomoaki Yuzuri, Kazuhisa Sakakibara
2005 Volume 34 Issue 11 Pages
1534-1535
Published: 2005
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Structural identification of the spin adducts produced by α-phenyl-
N-
tert-butylnitrone (PBN) with short-lived carbon centered radicals (phenyl,
n-butyl, and
tert-butyl) can be carried out unambiguously by combining the data obtained with ESR, Mass, and HPLC analyses.
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Zonghuan Lu, Tatsiana Shutava, Nurettin Sahiner, Vijay John, Yuri Lvov
2005 Volume 34 Issue 11 Pages
1536-1537
Published: 2005
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Multilayered polyelectrolyte poly(sodium 4-styrenesulfonate)/poly(allylamine hydrochloride) microcapsules prepared using layer-by-layer (LbL) assembly technology were filled by UV-photopolymerization of acrylamide derivatives directly into the capsule interior. Influences of component properties and polymerization conditions on the structure of the obtained composites are discussed. Mixing formed polymer chains with the capsule wall material stabilizes the initial wall conformation and lowers capsule sensitivity to environmental conditions.
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Hiroto Yoshida, Masahiko Watanabe, Joji Ohshita, Atsutaka Kunai
2005 Volume 34 Issue 11 Pages
1538-1539
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A methylene–phosphorus σ-bond of cyanomethyldiphenylphosphine oxide was found to add across a carbon–carbon triple bond of arynes, leading to the simultaneous introduction of cyanomethyl and diphenylphosphinyl moieties into 1,2-positions of the aromatic skeletons.
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Fang Chang, Wanyi Li, Fei Xia, Zhiyin Yan, Jie Xiong, Jiaqiang Wang
2005 Volume 34 Issue 11 Pages
1540-1541
Published: 2005
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Highly selective formation of benzophenone (99.1%) from diphenylmethane is reported for the first time using H
2O
2 (30%) as an oxidant and Co/MCM-41 as the catalyst.
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Masakazu Hirotsu, Shinsuke Taruno, Takashi Yoshimura, Keiji Ueno, Masa ...
2005 Volume 34 Issue 11 Pages
1542-1543
Published: 2005
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Supplementary material
The first titanium(IV) complexes with cyclic tetrasiloxide ligands, [Ti(L
1H)(OSiMe
3)]
2(H
2O) (
1) and (CpTiCl)
4(L
2)
2 (
2), were synthesized using the all-cis isomer of cyclotetrasiloxanetetraols R
4(SiO)
4(OH)
4 (L
1H
4: R = Ph, L
2H
4: R =
iPr) as ligand precursors. X-ray analysis revealed that
1 is a dinuclear complex with bridging siloxy and aqua ligands while
2 has a tetranuclear cage structure capped by two L
2 ligands.
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Naotake Nakamura, Masako Nishikawa
2005 Volume 34 Issue 11 Pages
1544-1545
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Supplementary material
The molecular and crystal structures of 1,1′-disubstituted ferrocene derivative, 1,1′-bis[2-[4-(4-methoxyphenoxycarbonyl)phenoxy]ethoxycarbonyl]ferrocene (bMAF-2) were determined by X-ray diffraction method using the single crystals. The trans conformation (novel “Z” shape) in which the two substituents existed in the opposite directions was found out newly. The structure was different from the cis conformation (“U” shape) and the trans conformation (“S” shape) reported already. It may be one of the most important reasons why bMAF-2 (“Z” shape) shows no liquid crystallinity that the ratio of the width to length is rather large compared with those of other liquid crystalline homologues (“U” shape and “S” shape).
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Yoshio Yamada, Hiroyuki Ohno, Osamu Tanaike, Hiroaki Hatori
2005 Volume 34 Issue 11 Pages
1546-1547
Published: 2005
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Porous carbons were obtained from octafluoronaphthalene defluorinated with sodium metal. When the by-product, NaF was removed with acid solution and the product was treated at 1073 K, the carbon gave a high surface area with mesopores as well as micropores. The coexistence of NaF during heat-treatment of the defluorinated product, however, brought about the formation of pores with a squarish shape.
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Hiroshi Matsubara, Louis Maeda, Ilhyong Ryu
2005 Volume 34 Issue 11 Pages
1548-1549
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Supplementary material
N,
N-Dimethylformamide derivatives
1a (Rf
6-DMF) and
1b (Rf
8-DMF) with a C6 or C8 fluorous ponytail, respectively, have been synthesized and examined for some physical properties. Rf
6-DMF was tested as a solvent for Mizoroki–Heck arylation of butyl acrylate and Sonogashira coupling reaction of iodobenzene with phenylacetylene. Both reactions proceeded as smoothly as in DMF to give the products in high yield. Fluorous DMF derivative
1a can be recovered easily from the reaction mixture by a fluorous/organic biphasic workup and recycled.
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Dariusz Matoga, Masahiro Mikuriya, Makoto Handa, Janusz Szklarzewicz
2005 Volume 34 Issue 11 Pages
1550-1551
Published: 2005
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Supplementary material
One-dimensional coordination polymer of [Ru
2(piv)
4(μ-CN)W(CN)
7]
n2n− (Hpiv = pivalic acid) has been synthesized in the presence of PPh
4+. The X-ray crystal structure reveals an alternating arrangement of ruthenium(II,III) dimers and [W(CN)
8]
3− ions in a 1-D chain. The magnetic susceptibility data (4.5–300 K) shows a ferrimagnetic behavior of this complex.
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Azusa Kikuchi, Jiro Abe
2005 Volume 34 Issue 11 Pages
1552-1553
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Supplementary material
On irradiation with UV light, the photochromic dimer of 1,4-bis(imidazolyl)tetrafluorobenzene produced the colored transient species in solution and solid. Though the dimerization reaction to form the photochromic dimer prevents the isolation and characterization of the colored species at room temperature, the single crystals of the colored species could be successfully obtained from the light-irradiated toluene solution of the dimer at 200 K, and the molecular structure of the colored species is unambiguously determined by the X-ray diffraction analysis.
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Masato Kyakuno, Shigero Oishi, Hitoshi Ishida
2005 Volume 34 Issue 11 Pages
1554-1555
Published: 2005
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The
fac/
mer-ratios of the iron(II) complexes with the derivatives of an unnatural amino acid, 5′-
N-acetylamino-2,2′-bipyridine-5-carboxylic acid, were investigated. It was found that the amide derivatives with secondary amines selectively yielded the
mer-isomers independently of the ligand structures. On the other hand, for the amides with primary amines, the ratios of the
fac- and
mer-complexes increased and decreased, respectively, with the increasing sizes of the substituents, suggesting stabilization of the
fac-isomers by electrostatic interaction (or hydrogen bondings) between the ligands.
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Takeshi Yamada, Shigemori Kinjyo, Jun-ichi Yoshida, Shigeru Yamago
2005 Volume 34 Issue 11 Pages
1556-1557
Published: 2005
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The iterative glycosylation of di- and tetrachlorophthaloyl-protected thioglucosamines, which act as both glycosyl donors and acceptors, gives the corresponding protected oligoglucosamines. Subsequent removal of the protecting groups followed by acetylation of the free amines affords oligo-
N-acetylglucosamines in good to excellent combined yields.
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Mohammed Omar Faruk Khan, Seheli Parveen, Gavin Malcolm Seddon, Kennet ...
2005 Volume 34 Issue 11 Pages
1558-1559
Published: 2005
Released on J-STAGE: October 15, 2005
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Recombinant
Trypanosoma cruzi trypanothione reductase can oxidize NADPH in a futile cycle in the presence of vanadate ion as a result of the generation of reactive oxygen and other radical species from the active site dithiol and the NADPH. This process is inhibited by competitive inhibitors of trypanothione reductase catalyzed reduction of trypanothione disulfide.
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Hisanori Kishida, Fangming Jin, Zhouyu Zhou, Takehiko Moriya, Heiji En ...
2005 Volume 34 Issue 11 Pages
1560-1561
Published: 2005
Released on J-STAGE: October 15, 2005
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Hydrothermal decomposition experiments of glycerin with an alkali showed that glycerin could be converted into lactic acid with a high yield of about 90 mol % based on glycerin used. Discussion on the pathway for the conversion of glycerin to lactic acid suggests that glycerin is first decomposed to pyruvaldehyde with elimination of hydrogen by a H
− shift to the adjacent hydrogen. Pyruvaldehyde formed is then converted into lactic acid ion by the benzilic acid rearrangement.
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Tetsuaki Fujihara, Rei Okamura, Koji Tanaka
2005 Volume 34 Issue 11 Pages
1562-1563
Published: 2005
Released on J-STAGE: October 22, 2005
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The structural and electronic properties of [Ru
II(trpy)(ClSQ)(PPh
3)]
+ (trpy = 2,2′:6′,2″-terpyridine; ClSQ = 4-chlorobenzosemiquinonate) and [Ru
II(trpy)(ClCat)(PPh
3)] (ClCat = 4-chlorocatecholate) have been characterized by X-ray diffractometry, UV–vis spectroscopy, ESR, and electrochemistry.
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Shigeyoshi Inoue, Masaaki Ichinohe, Akira Sekiguchi
2005 Volume 34 Issue 11 Pages
1564-1565
Published: 2005
Released on J-STAGE: October 22, 2005
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Tetrakis(di-
tert-butylmethylsilyl)disilene (
3) was treated with 2 equiv. of metal naphthalenide (M = Li, Na, and K) in THF to give the disilenyl anion by elimination of one
tBu
2MeSi group, through the intermediate formation of a disilene dianion upon two-electron reduction. The red crystals of sp
2-type silyl anions were isolated as the corresponding alkali metal derivatives, which were characterized by NMR spectra and X-ray crystallography.
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