-
Xiao-Hang Chen, Zujin Zhao, Yang Liu, Ping Lu, Yan-Guang Wang
2008 Volume 37 Issue 6 Pages
570-571
Published: June 05, 2008
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Supplementary material
Four new fluorenes bearing two electron donors and two electron acceptors were synthesized and found to emit blue fluorescence in both solution and solid states.
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Toshiro Yamanaka
2008 Volume 37 Issue 6 Pages
572-573
Published: June 05, 2008
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Angular dependence of rotational and vibrational temperatures of product CO
2 were studied in CO oxidation on a Pd polycrystalline surface by means of chemiluminescence measurements. Rotational temperature (
Trot) and vibrational temperature (
Tvib) showed minimum values at the surface normal and significantly increased as the desorption angle increased.
Trot and
Tvib became higher when the ratio of exposure of O
2 to that of CO increased. These angular dependences are quite different from those on Pd(111).
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Soshi Shiraishi, Akihiro Kikuchi, Masaki Sugimoto, Masahito Yoshikawa
2008 Volume 37 Issue 6 Pages
574-575
Published: June 05, 2008
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We tried to prepare silicon carbide-based nanoporous materials using the replica method. The polycarbosilane (PCS) as the SiC precursor filled the mesopores of mesoporous silica as the template, and then calcination and subsequent removal of the silica matrix led to the mesoporous product with a BET specific surface area of 780 m
2 g
−1. The product had the SiC
≈1.9O
≈0.9 composition and very low crystallinity, indicating a good resistivity to oxidative conditions.
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Takayuki Michi, Masaaki Abe, Satoru Takakusagi, Masako Kato, Kohei Uos ...
2008 Volume 37 Issue 6 Pages
576-577
Published: June 05, 2008
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An in situ approach for rapid growth of multilayers of redox-active triruthenium cluster complexes has been developed under electrochemical potential control of the gold electrode, the formation process being successfully probed by cyclic voltammetry and AFM images.
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Yuki Koyama, Yoshihito Hayashi, Kiyoshi Isobe
2008 Volume 37 Issue 6 Pages
578-579
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Supplementary material
A chiral octadecavanadate has been isolated and optically resolved into enantiomers by spontaneous resolution. From the partial oxidation reaction of a reduced decavanadate [V
10O
26]
4− with nitric acid, a chiral octadecavanadate encapsulating a nitrate template was formed. A nitrate anion was incorporated at the center of the spherical polyoxovanadate cage. The structure may be regarded as a double helical V8 ribbon between two square pyramidal V
VIO
5 units, consisting of half-pitch helix with ca. 11.0 Å diameter and a half pitch length of 8 Å.
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Junpei Miyake, Yoshiki Chujo
2008 Volume 37 Issue 6 Pages
580-581
Published: June 05, 2008
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Poly(acrylic acid) (PAA)/silica hybrids having imidazolium chloride [IL(Cl
−)] moieties could be prepared by utilizing ionic interactions between anionic carboxylic acid groups of PAA and cationic imidazolium groups of silica phase. By removing PAA from the obtained hybrids, we could obtain hydrophilicity-controllable microporous hybrids by means of anion-exchange reaction of imidazolium moieties.
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Kazutoshi Murota, Seiji Sakamoto, Kazuaki Kudo
2008 Volume 37 Issue 6 Pages
582-583
Published: June 05, 2008
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Supplementary material
We designed a two-step-release system that enables protein release from hydrogel in response to glucose. In the system, one of the heterodimeric coiled-coil forming peptides was initially fixed to a hydrogel via a boronate–diol interaction. The peptide was specifically released from the hydrogel by externally incoming glucose. As a result, a protein immobilized in another hydrogel was librated owing to the displacement by the peptide at its hydrogel-bound coiled-coil moiety.
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Keita Tanaka, Akinori Kuzuya, Makoto Komiyama
2008 Volume 37 Issue 6 Pages
584-585
Published: June 05, 2008
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Supplementary material
A caged DNA template, which bears a caged thymine {4-
O-[2-(2-nitrophenyl)propyl]thymine, T
NPP} near its 5′-end, was prepared, and used for in vitro DNA replication. The photo labile 2-(2-nitrophenyl)propyl (NPP) group efficiently blocked DNA polymerase reaction, and site-selectively terminated the extension of complementary strand there. This NPP-group can be removed by simple 30-min UVA irradiation to the solution, to give restriction-enzyme-free sticky end on the template strand.
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Yusuke Yoshida, Katsuya Inoue, Mohamedally Kurmoo
2008 Volume 37 Issue 6 Pages
586-587
Published: June 05, 2008
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Supplementary material
An irreversible single-crystal-to-single-crystal transformation is observed upon dehydration of [Mn
II(
rac-pnH)(H
2O)Cr
III(CN)
6]·H
2O. The virgin, dehydrated, and rehydrated phases are ferrimagnets with Curie temperature of 36, 70, and 36 K, respectively.
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Yuzo Kasuya, Megumi Ohtaka, Kei Tsukamoto, Yasuyuki Ikeda, Kazunari Ma ...
2008 Volume 37 Issue 6 Pages
588-589
Published: June 05, 2008
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Supplementary material
In order to facilitate biosensor analyses of interactions on membrane surfaces, a method of immobilizing liposome using anchoring amphiphilic peptides was developed. Intact liposomes were immobilized stably on a quartz crystal microbalance electrode and were applied to a quantitative study of glycolipids–protein interactions.
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Kei Nishii, Shigetaka Hayano, Yasuo Tsunogae, Zhengguo Cai, Yuushou Na ...
2008 Volume 37 Issue 6 Pages
590-591
Published: June 05, 2008
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Supplementary material
A new
ansa-fluorenylamidodimethyltitanium complex
1 was synthesized and applied for ethylene–dicyclopentadiene copolymerization using modified methylaluminoxane (MMAO) as a cocatalyst at 50 °C.
1–MMAO exhibited the remarkable catalytic activity for the copolymerization and gave a copolymer with high glass-transition temperature of 191 °C.
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Kiichi Kuroda, Yujiro Hayashi, Teruaki Mukaiyama
2008 Volume 37 Issue 6 Pages
592-593
Published: June 05, 2008
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A method for the preparation of alkyl aryl sulfides from alcohols and 2-sulfanylbenzothiazole by a new type of oxidation–reduction condensation using phenyl diphenylphosphinite and 2,6-dimethoxy-1,4-benzoquinone is described. In this reaction, the chiral alcohols are converted into the corresponding chiral sulfides with almost complete inversion of configurations under mild and neutral conditions.
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Hiroshi Yao, Shogo Kobayashi, Keisaku Kimura
2008 Volume 37 Issue 6 Pages
594-595
Published: June 05, 2008
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A free base tetracationic porphyrin (TMPyP) was adsorbed at a mica/aqueous solution interface. Atomic force microscopy (AFM) in liquid revealed that the porphyrin rings lie flat on the mica surface with their meso substituents partially rotated toward planarity. Optical waveguide spectroscopy elucidated a bathochromic shift of the Soret band, suggesting extension of π-conjugation by partial inclusion of pyridinium rings.
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An Yong Li
2008 Volume 37 Issue 6 Pages
596-597
Published: June 05, 2008
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Theoretical study of an example of intramolecular blue-shifted H-bond N–H···O shows that the blue shift of the N–H bond is caused by an increase in s-character of the N-hybrid AO of the N–H bond upon formation of the H-bond. The effect of hyperconjugation was also analyzed.
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Tae Ho Kim, Youngmoon Kim, Soo Jin Lee, Won Seok Han, Jong Hwa Jung
2008 Volume 37 Issue 6 Pages
598-599
Published: June 05, 2008
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Supplementary material
Polyaniline silica nanotubes (PANI@SNT) were prepared by in situ polymerization of anilinium ion adsorbed on the surface of silica nanotubes (SNT), which acted as a template. After polymerization, the silica templates were intensively removed with HF solution to give closed polyaniline nanotubes (PANI–NT). Interestingly, the PANI@SNT showed pH-responsive redox reversibility.
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Ai Li Sun, Qing An Qi, Zhuang Long Dong
2008 Volume 37 Issue 6 Pages
600-601
Published: June 05, 2008
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This letter describes a dual-amplified electrochemical sandwich-type enzyme immunoassay for the cancer antigen 125 (CA125) by using irregularly shaped gold nanoparticle-labeled horseradish peroxidase (HRP)-bound anti-CA125 as secondary antibodies. Compared with conventional sandwich-type immunoassays, the proposed immunoassay exhibits a low detection limit and wide linear range.
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Kimihiro Komeyama, Keita Takahashi, Ken Takaki
2008 Volume 37 Issue 6 Pages
602-603
Published: June 05, 2008
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Bi(OTf)
3 was found to be a good catalyst for intramolecular addition of carboxylic acids to alkynes (hydro-oxycarbonylation), which afforded the corresponding 5- and 6-membered lactones in moderate to good yields under mild conditions.
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Nobutake Tamai, Takayuki Matsui, Nobutaka Moribayashi, Masaki Goto, Hi ...
2008 Volume 37 Issue 6 Pages
604-605
Published: June 05, 2008
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We investigated the effect of cholesterol on the pressure-induced interdigitation of dipalmitoylphosphatidylcholine (DPPC) bilayer membrane by fluorescence technique using 6-propionyl-2-(dimethylamino)naphthalene (Prodan) as a probe. The interdigitation pressure (IP), minimum pressure required for the bilayer interdigitation, was elevated with increasing cholesterol composition (
Cch) up to ca. 2 mol %. Further increase of
Cch did not give any effect on the IP value. Finally, the interdigitation could not be observed at
Cch=8 mol %. Constructed pressure–
Cch phase diagram at 50 °C suggests that the retardation and the abolition of the interdigitation are attributable to an interference effect and eventual formation of ordered molecular orientation induced by cholesterol.
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Ya-nan Zhang, Miao Chen, Shan Liang, Yanchun Zhao
2008 Volume 37 Issue 6 Pages
606-607
Published: June 05, 2008
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Porous anodic alumina (PAA) with regular channel structure was chosen as a template, and highly ordered TiO
2 nanofibrils arrays were fabricated within the pores of PAA by a sol–gel process. A series of TiO
2 nanostructures obtained after the TiO
2/Al
2O
3 composite film was treated with the NaOH for different times. Contact angle measurements indicated that the surface structure strongly affected the wetting behavior of the TiO
2 nanofibrils. The wettability of the surface changed from hydrophilic to hydrophobic when the structure of aligned nanofibrils with end tips was obtained.
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Yoshiro Ohgi, Akimitsu Ishihara, Yohei Shibata, Shigenori Mitsushima, ...
2008 Volume 37 Issue 6 Pages
608-609
Published: June 05, 2008
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In order to commercialize polymer electrolyte fuel cells (PEFCs) widely, partially oxidized transition-metal carbide–nitride (TM-C–N; TM = Ti, Zr, and Ta) have been investigated as new cathodes without platinum. The specimens were prepared by the electrophoretic deposition of the transition-metal carbide–nitride on titanium plate and were heat-treated at 1000 °C under flowing 2%-H
2/N
2 gas containing ca. 0.25% oxygen. Partially oxidized Ta-based catalysts had highest catalytic activity, followed by Ti- and Zr-based catalysts.
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Chiung-Wen Kuo, Jau-Ye Shiu, Kung Hwa Wei, Peilin Chen
2008 Volume 37 Issue 6 Pages
610-611
Published: June 05, 2008
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The biocompatibility of the surface-functionalized silver nanowires has been investigated in two cell lines. It was found that the functionalized silver nanowires with 200 nm diameter and length up to a few μm can be internalized by cells. The cytotoxicity of the silver nanowires was found to depend on their surface modifications. It was also demonstrated that the surface-enhanced Raman scattering (SERS) could be measured on the silver nanowires, which added additional functionality to the silver nanowires.
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Rushiru Komatsu-Watanabe, Yasuhiro Sakurai, Chie Morimoto, Shunji Saka ...
2008 Volume 37 Issue 6 Pages
612-613
Published: June 05, 2008
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A new flow-injection ESR system (FI-ESR) special for the quantitative spin-trapping ESR measurements is developed to estimate the second-order rate constants (
ks) of the reaction between hydroxyl radical and selected scavengers, glycine, mannitol, and 4-hydroxycoumaric acid. The
ks values of these scavengers show reasonable agreement with those evaluated by pulse radiolysis method.
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Xun Hu, Gongxuan Lu
2008 Volume 37 Issue 6 Pages
614-615
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The inhibition effect of potassium addition on methane formation in steam reforming of acetic acid over alumina-supported cobalt catalyst has been studied. Co–K/Al
2O
3 catalyst showed much higher activity for hydrogen generation and much lower selectivity for methane than Co/Al
2O
3. Potassium addition resulted in the inhibition of methanation process. The similar effect was also observed in methanol and ethanol reforming reactions.
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Takashi Uemura, Yukari Ono, Susumu Kitagawa
2008 Volume 37 Issue 6 Pages
616-617
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Supplementary material
Radical copolymerizations of vinyl monomers, such as styrene, methyl methacrylate, and vinyl acetate, in the nanochannels of a porous coordination polymer have been studied. The results are compared with those obtained for the corresponding free radical copolymerizations, which shows a spatial confinement effect on the monomer reactivity ratios in this system.
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Keiichi Katoh, Naoki Sato
2008 Volume 37 Issue 6 Pages
618-619
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Supplementary material
We have synthesized a zwitterion-like molecule
1 having an
N,
N,
N-tridentate ligand site for metal complexation. Compound
1 exhibited negative solvatochromism of the intramolecular charge-transfer (ICT) band in its UV–visible absorption spectrum for different polarity of solvents. Its anion radical (
1−•) was generated from both electrical and chemical reduction of the
p-naphthoquinone moiety.
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Sweety Singhal, Suman L. Jain, Bir Sain
2008 Volume 37 Issue 6 Pages
620-621
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An efficient and simple protocol for regioselective ring opening of epoxides with thiols, acetic anhydride, and alcohols using 16 wt % MoO
3 supported on alumina as a recyclable catalyst is described.
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Bao-Min Zhao, Ni-Na Fu, Ling-Hai Xie, Lian-Hui Wang, Wei Huang
2008 Volume 37 Issue 6 Pages
622-623
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Supplementary material
The syntheses of two well-defined organic nanomaterials, TDFF-TPA and TDFF-FBCz, with highly nonplanar structures, based on complicated 9,9-diarylfluorenes (DAF) by BF
3·OEt
2-mediated Friedel–Crafts reactions are presented.
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J. S. Yadav, A. P. Singh, D. C. Bhunia, A. K. Basak, P. Srihari
2008 Volume 37 Issue 6 Pages
624-625
Published: June 05, 2008
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Baylis–Hillman adducts undergo smooth 1,3-dipolar cycloaddition reaction with ethyl diazoacetate in the presence of 2-iodoxybenzoic acid to produce pyrazolines in high yields under mild reaction conditions.
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Yasumasa Kanekiyo, Takenori Yokozawa, Hiroaki Tao
2008 Volume 37 Issue 6 Pages
626-627
Published: June 05, 2008
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Supplementary material
A novel saccharide sensory system showing remarkable color changes has been developed. A copolymer containing boronic acid and cationic units was synthesized on which anionic dyes were adsorbed. By immersing the dye-adsorbed copolymer in aqueous saccharide solutions, blue and yellow dyes were sequentially released from the copolymer: with increasing saccharide concentration, the solution changed its color from colorless to blue, then changed into green.
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Shinji Yamada, Emiko Ohta
2008 Volume 37 Issue 6 Pages
628-629
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A reaction of pyridinium perfluorophenacylide generated from pyridinium salt
1 with 1,1-dicyanoethylene derivatives
2 produced unusual products
3, which have an ylide structure with a cyano group at the C2 and a
cis-acrylonitrile moiety at the o-position of the perfluorophenyl group. A plausible mechanism involving intramolecular aromatic nucleophilic substitution and 1,3-migration of the cyano group is proposed for this reaction.
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Hiroyasu Nishi, Seiya Kobatake
2008 Volume 37 Issue 6 Pages
630-631
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Supplementary material
A dithiobenzoate end group of polystyrene generated by reversible addition–fragmentation chain-transfer radical polymerization was reduced to a thiol group in various reduction methods, and the structure of the products was analyzed using
1H NMR, IR, and MALDI-TOFMS. It was found that the side reactions including a dimerization of the polymers were observed and they can be prevented by a specific process.
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Satomi Eno, Hiromichi Egami, Tatsuya Uchida, Tsutomu Katsuki
2008 Volume 37 Issue 6 Pages
632-633
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Various heterogeneously or homogeneously hybridized salen/salan ligands were synthesized, and study of hetero Diels–Alder reactions using their chromium complexes as catalysts revealed that a well-designed heterogeneously hybridized ligand serves as a chiral auxiliary as efficiently as the homogeneously hybridized ligand and its chromium complex has high catalytic activity.
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Takeshi Sakano, Hidehiro Yamaguchi, Naoki Tanifuji, Masahiro Irie, Ken ...
2008 Volume 37 Issue 6 Pages
634-635
Published: June 05, 2008
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Supplementary material
A silver nanoparticle network interlinked by photochromic diarylethene dithiophenols was fabricated and its photoreactive and conductive properties were investigated. The network showed reversible changes in absorption spectra and conductance by photoirradiation. The results indicate the percolation-type behavior.
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Yi Wang, Wensheng Yang, Chen Chen
2008 Volume 37 Issue 6 Pages
636-637
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By using formamide as the carbon source, an attempt was made to electrodeposit diamond-like carbon (DLC) films on indium tin oxide (ITO)-coated glass plate substrates at a low constant voltage and room temperature. The structures and morphologies of the films were analyzed by Raman spectroscopy and field-emission scanning electron microscopy.
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Samuli Räsänen, Hisao Yamauchi, Maarit Karppinen
2008 Volume 37 Issue 6 Pages
638-639
Published: June 05, 2008
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Various powerful oxygenation approaches were tested in order to find the limits of the oxygen-storage capability of YBaCo
4O
7+δ. By means of extreme solid-medium high-pressure oxygenation employing KClO
3 as an oxygen generator the phase was successfully loaded with excess oxygen up to δ≈1.56.
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Sanshiro Komiya, Akari Sako, Hirofumi Kosuge, Masafumi Hirano, Nobuyuk ...
2008 Volume 37 Issue 6 Pages
640-641
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Vigorous mechanical mixing of the water/hexane biphasic Pd-catalyzed allylation of benzenethiol gave sterically congested allyl sulfides, due to high reactivity of the enforced orientation of the η
1-allylpalladium intermediate at the solvent interface.
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Tomoaki Hinoue, Yuji Mizobe, Ichiro Hisaki, Mikiji Miyata, Norimitsu T ...
2008 Volume 37 Issue 6 Pages
642-643
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Supplementary material
Solid-state luminescence quantum efficiency is modulated drastically by CH–O interaction and packing rigidity of secondary ammonium anthracene-2,6-disulfonate. Appropriate alkyl chains of amines gave small free space and long CH–O distance, resulting in strong luminescence due to suppression of nonradiative decay. This is the first demonstration that CH–O intermolecular interaction has great influence on solid-state luminescence quantum efficiency.
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Jun Qiu, Wanqing Shen, Ruijie Yu, Baodian Yao
2008 Volume 37 Issue 6 Pages
644-645
Published: June 05, 2008
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Silicon nanocrystals have been produced successfully by using silicon monoxide as the starting material via a simple solvothermal preparation method. The temperature needed in the solvothermal preparation is found to be as low as 220 °C when ethylenediamine is used as the solvent. The as-prepared silicon samples are of single-crystal nature with diameters around 5 nanometers and dispersed in an amorphous silica. The silicon nanocrystals became a little larger in size after removing the amorphous silica, according to the results of transmission electron microscope (TEM) characterization.
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Fumitoshi Shibahara, Atsunori Yoshida, Toshiaki Murai
2008 Volume 37 Issue 6 Pages
646-647
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Supplementary material
Copper-catalyzed oxidative desulfurization-promoted intramolecular cyclization reactions of thioamides take place under neutral and mild conditions by using molecular oxygen as an oxidant. The process yields a wide variety of nitrogen-containing heterocycles with high efficiency.
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Takahiko Nojima, Hiroshi Kimura, Teruo Fujii
2008 Volume 37 Issue 6 Pages
648-649
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Supplementary material
DNA with repetitive sequence of green fluorescent protein (GFP) was prepared by rolling circle amplification with φ29 DNA polymerase from a bacterial expression vector carrying a GFP gene. The prepared DNA was subjected to a cell-free coupled transcription–translation system and green fluorescence was observed, which shows that the template with repetitive sequence properly functioned in the reaction. The efficiency of the reaction conducted by the template with repetitive sequence was higher than those by linear template coding single gene or by circular plasmid.
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Takeshi Yamada, Eri Mishima, Kazuya Ueki, Shigeru Yamago
2008 Volume 37 Issue 6 Pages
650-651
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Supplementary material
A powerful electrophilic activator for organotellurium compounds was developed. Phenyltellanyl triflate (PhTeOTf) prepared in situ from dibromophenyl(phenyltellanyl)telluride and AgOTf selectively activated various organotellurium compounds in the presence of aromatic compounds yielding the corresponding Friedel–Crafts reaction products. Polymer-end organotellurium compounds were also activated by PhTeOTf providing the corresponding end-functionalized polymers.
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J. S. Yadav, B. V. Subba Reddy, Y. Jayasudhan Reddy
2008 Volume 37 Issue 6 Pages
652-653
Published: June 05, 2008
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Supplementary material
Selectfluor
TM is found to catalyze efficiently the electrophilic thiocyanation of indoles and pyrrole with ammonium thiocyanate under mild and neutral conditions to produce the corresponding 3-indolyl and 2-pyrrolyl thiocyanates, respectively, in excellent yields with high selectivity. This method is effective even with azaindole and carbazole while many of reported procedures failed to produce thiocyanates from azaindole.
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Eiji Shirakawa, Yusuke Imazaki, Tamio Hayashi
2008 Volume 37 Issue 6 Pages
654-655
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Supplementary material
Co(acac)
3–PPh
3 was found to effectively catalyze the C(sp
2)–C(sp
2) coupling of Grignard reagents to give alkenylarenes and conjugated dienes, utilizing close affinity towards alkenyl triflates.
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Guilei Wang, Yue Chen, Aiguo Zhong, Hongguang Du, Ming Lei
2008 Volume 37 Issue 6 Pages
656-657
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Supplementary material
A theoretical study on the formation mechanism of bisaryl oxime ether from benzaldehyde and phenoxyamine at the B3LYP/6-31++G
** level indicates that the water-assisted acid-catalyzed mechanism is more favorable than that in neutral conditions. Intermolecular interactions between monomers of E and Z producing stereoisomers are predicted to play an important role in their stabilities.
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Yoshiaki Sugihara, Yui Aoyama, Haruki Okada, Juzo Nakayama
2008 Volume 37 Issue 6 Pages
658-659
Published: June 05, 2008
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Supplementary material
The isolation of thiirane 1-imides was achieved via imination of
anti- and
syn-9,9′-bibenzonorbornenylidene sulfides by Chloramine T at room temperature, followed by crystallization of the reaction mixture at −18 °C. Allowing CD
2Cl
2 solutions of the thiirane 1-imides stand at room temperature or heating their crystals to around 120 °C led to the formation of the corresponding 1,2-thiazetidines with retention of the configuration of the thiirane 1-imides.
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Kazuhiro Kumeda, Munetosi Ono, Atsushi Kawai, Hideaki Oike, Keiichi No ...
2008 Volume 37 Issue 6 Pages
660-661
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Supplementary material
A rigid, thick, and optically active aromatic macrocycle having 6,6′-binaphthylylene moieties was successfully obtained in a moderate yield by synthesis and S
NAr of 6-(4-fluorobenzoyl)-6′-hydroxy-2,2′-dimethoxy-1,1′-binaphthyl. The X-ray crystal structural analysis of the obtained macrocycle reveals rigid concavo–concave shape of the molecule and the bidirectional tunnel-like structure assembly consisting of two types of channels along
a axis and
c axis originated by intra- and intermolecular cavities, respectively.
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Hidenori Kimura, Kohei Torikai, Kazuhiro Miyawaki, Ikuo Ueda
2008 Volume 37 Issue 6 Pages
662-663
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Thermal cyclizations of nonconjugated ene–diyne–nitrile
1 and ene–triyne–nitrile
2 systems were examined and proved to yield not azafluorenol, but cyanofluorenol derivatives (
9 and
11, respectively), indicating that the cyano groups do not participate in the radical cycloaromatization but do play important roles to determine the mode of cyclization.
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Takao Kikuchi, Jun Takagi, Tatsuo Ishiyama, Norio Miyaura
2008 Volume 37 Issue 6 Pages
664-665
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Vinylic C–H borylation of cyclic vinyl ethers by bis(pinacolato)diboron was effectively catalyzed by iridium complexes comprised of 1/2[Ir(OMe)(cod)]
2 and 4,4′-di-
tert-butyl-2,2′-bipyridine in hexane or octane to give the corresponding vinylboron compounds in good yields. The reaction of 1,4-dioxene occurred even at room temperature, whereas the reactions of dihydropyran and dihydrofuran derivatives required a temperature above 80 °C. Although dihydropyran and dihydrofuran themselves produced regioisomeric mixtures of α- and β-borylated products, similar substrates possessing substituents at the γ-position selectively underwent borylation at the α-position.
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Shin-ichi Ozaki, Chisato Dairaku, Yoko Kuradomi, Junko Inoue
2008 Volume 37 Issue 6 Pages
666-667
Published: June 05, 2008
Released on J-STAGE: June 05, 2008
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Supplementary material
We have studied absorption spectral changes and heme modifications in the reaction of horseradish peroxidase (HRP), myoglobin (Mb), or bovine liver catalase (BLC) with hypochlorous acid (HOCl). Under acidic condition, HOCl is easily released from an Fe
III–HOCl complex. In contrast, the O–Cl bond cleavage in an Fe
III–OCl intermediate occurs under neutral and alkaline conditions. The heterolysis proceeds in HRP and BLC, but the homolysis in Mb seems to be associated with the generation of meso-chlorinated heme adduct.
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