-
Akira Igarashi, Hiromichi Asano, Yoshihiro Kikuchi, Yoshisada Ogino
1982 Volume 11 Issue 11 Pages
1693-1696
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Several Metal/WO
3 systems (Metal = Re, Ir, Rh, Ru, Os, Pd, Pt) exhibit high hydrogen evolution activities when contacted with water vapor at 480°C. The use of WO
3 along with a metal species is necessary to bring about the high activity. X-Ray diffraction data of Rh/W
3O systems strongly suggest that W
3O species formed by activation (reduction by H
2) is responsible for the unique property of WO
3.
View full abstract
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Katsuyuki Ogura, Makoto Fujita, Kazumasa Takahashi, Hirotada Iida
1982 Volume 11 Issue 11 Pages
1697-1698
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The optimal conditions for transformation of a chloromethyl sulfide into the corresponding Grignard reagent (
2) in a high yield are established and (
2) is shown to react with various functional groups such as an alkyl halide, an aldehyde, and a sulfinic ester, revealing its usefulness in organic syntheses.
View full abstract
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Kazuhiro Maruyama, Hitoshi Tamiaki
1982 Volume 11 Issue 11 Pages
1699-1702
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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In an alkaline aqueous solution, photochemical valence isomerization of norbornadiene derivative
1 to quadricyclane derivative
2 occurred quantitatively, and reverse isomerization of
2 to
1 under release of heat was achieved by catalytic action of cobalt hematoporphyrin
3 and analogues. This system may be of a great practical use for a solar energy storage.
View full abstract
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Rikuhei Tanikaga, Yoshihito Nozaki, Kazuhiko Tanaka, Aritsune Kaji
1982 Volume 11 Issue 11 Pages
1703-1706
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Methyl 4-hydroxy-
E-2-alkenoates prepared from aldehydes in one step, undergo the Michael reactions with thiolate anions to give 4-alkanolide derivatives, which are converted into 2-alken-4-olides. Methyl 4-methanesulfonyloxy-
E-2-alkenoates undergo the substitution reactions, and subsequent treatments give methyl
E,
E-2,4-alkadienoates.
View full abstract
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Fumiyuki Ozawa, Kiyoshi Iri, Akio Yamamoto
1982 Volume 11 Issue 11 Pages
1707-1710
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Electron-rich cobaltate dinitrogen complex, [Co(PPh
3)
3N
2]Li(Et
2O)
3 1, reacts with alkyl and aryl nitrile compounds causing the cleavage of C–CN bond under mild conditions to release hydrocarbons. Catalytic activity of the cobalt complex to isomerize allyl cyanide to crotononitrile is also noted.
View full abstract
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Shonosuke Zen, Kazuho Harada
1982 Volume 11 Issue 11 Pages
1711-1714
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The derivatives of 4
H-1,2,4-oxadiazine, a new class of six-membered heterocycles, were synthesized through the reactions of β-diketones with aliphatic nitro compounds and acetyl chloride, and also of azirines with nitrile oxides. A reaction mechanism is proposed.
View full abstract
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Takahiro Kumonaka, Yasuhiro Kanai, Mitsutoshi Yanagiya, Takeshi Matsum ...
1982 Volume 11 Issue 11 Pages
1715-1718
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The proposed guaianoid structures for sclerosporal have turned out to be erroneous through synthesis of these structures, starting from (−)-carvone.
View full abstract
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Yoshio Okahata, Satoshi Hachiya, Gen-ichi Nakamura
1982 Volume 11 Issue 11 Pages
1719-1722
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Polyamide ultrathin capsules coated with the bilayer membrane of dialkyl amphiphiles were prepared. Permeation of NaCl from the inner aqueous phase of the coated capsules was reduced 30–50 times relative to that of the uncoated semipermeable capsule, and drastically changed near the phase transition temperature of the coating bilayer membrane.
View full abstract
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Shigeru Oae, Katsuaki Kikuchi, Masaru Moriyama, Naomichi Furukawa
1982 Volume 11 Issue 11 Pages
1723-1726
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Optically active
o-methoxyphenyl phenyl-
N-polyhaloacetylsulfilimines obtained in good yields upon simple treatment of a mixture of
o-methoxyphenyl phenyl sulfide and
t-butyl hypochlorite in the presence of l-menthol and polyhaloacetamide anion, are found to be rich in R-configuration. This means that the nucleophilic substitution of the incipiently formed (R
s)-l-menthyloxysulfonium salt with the polyhaloacetamide anion proceeds with retention of configuration.
View full abstract
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Kazuhiro Nakasuji, Kohki Takatoh, Ichiro Murata
1982 Volume 11 Issue 11 Pages
1727-1728
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Unsymmetrical bis(thiopyranylidene)ethene (BTPE) derivatives (
4) and (
5) and an extended analogue of BTPE (
6) have been prepared and their electrochemical properties are compared with those reported for the related compounds.
View full abstract
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Seiichiro Ogawa, Yoshikazu Iwasawa, Tatsushi Toyokuni, Tetsuo Suami
1982 Volume 11 Issue 11 Pages
1729-1732
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Methyl
N-[(1
S)-(1,2,4/3,5,6)-2,3,4,6-tetrahydroxy-5-(hydroxymethyl)cyclohexyl]-4-amino-4,6-dideoxy-α-
D-glucopyranoside, a common structural unit of the antibiotic oligostatins, has been synthesized and characterized as the heptaacetate.
View full abstract
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Shuji Tomoda, Yoshito Takeuchi, Yujiro Nomura
1982 Volume 11 Issue 11 Pages
1733-1734
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The reaction of ketene acetals with phenyl selenocyanate afforded a new type of compounds, α,α-dioxy-β-phenylseleno carbonitriles(carbonyl-protected α-oxo carbonitriles), in good yields. Oxidation of these vicinal cyanoselenenylation products gave β,γ-unsaturated α,α-dioxy carbonitriles in excellent yields.
View full abstract
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Masaru Miyayama, Yasuhisa Takuma, Hiroaki Yanagida
1982 Volume 11 Issue 11 Pages
1735-1738
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Lattice parameters, electrical conductivity and optical absorption for Li
2O doped ZnO were examined as a function of Li
2O content. As the Li
2O content increased, both c-axis dimension and conductivity decreased initially reaching the minima at the Li
2O content of 0.05∼0.1 mol% and later increased. These results can be interpreted such that the incorporation of Li took place at substitutional sites for low Li
2O content and at both interstitial and substitutional sites for more than 0.05mol% Li
2O.
View full abstract
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Toshihiko Ozawa, Akira Hanaki
1982 Volume 11 Issue 11 Pages
1739-1740
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Superoxide ion, O
2−, generated by the electrolytic reduction of molecular oxygen in acetonitrile associates with Mg(II) ion to form the Mg(II)–O
2− complex. The formation of adduct was verified by ESR spectrometry.
View full abstract
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Yoshihiro Ozawa, Norio Miura, Noboru Yamazoe, Tetsuro Seiyama
1982 Volume 11 Issue 11 Pages
1741-1742
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Antimonic acid samples thermally treated up to 893 K exhibited high proton conductivities of order of 10
−1 S·m
−1 at room temperature when the relative humidity was high. The humidity dependence of the conductivities changed with the heat treatment temperature, in coincidence with the changes in fine structure of the antimonic acid samples.
View full abstract
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Sakae Uemura, Suresh R. Patil
1982 Volume 11 Issue 11 Pages
1743-1746
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Treatment of some cyclic olefins and allylbenzene with Rh
2(OAc)
4 in acetic acid in the presence of
t-BuOOH gave the corresponding enones and allylic acetates, the former being predominant. Application to several styrene derivatives resulted in a selective C=C bond fission to give benzaldehyde or acetophenone. It is suggested that the reaction proceeds catalytically with Rh(II) acetate via an ionic pathway.
View full abstract
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Masaaki Yamada, Shigetaka Suzuki
1982 Volume 11 Issue 11 Pages
1747-1748
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Chemiluminescence in conjunction with flow injection analysis is described for the determination of traces of copper(II) by means of the flavin mononucleotide-hydrogen peroxide-phosphate buffer system. This permits the determination of copper (II) more selectively than any other chemiluminescent system with a detection limit of 30 pg.
View full abstract
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Nobuyasu Enoki, Ryoichi Ishida, Takeshi Matsumoto
1982 Volume 11 Issue 11 Pages
1749-1752
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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New nine-membered ring diterpenes acetyldictyolal (
2), hydroxyacetyldictyolal (
4) isodictyohemiacetal (
5) and dictyodiacetal (
7) have been isolated. Their structures and approximate conformations have been determined by spectral and chemical means.
View full abstract
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Masaru Sato, Hisayuki Watanabe, Seiji Ebine, Sadatoshi Akabori
1982 Volume 11 Issue 11 Pages
1753-1756
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Polythiaferrocenophanes,
5, and
8–
12, were prepared from 1,1′-ferrocenedithiol. Of these compounds, 1,4,7-trithia[7]ferrocenophane
8 showed an abnormal bathochromic shift in the electronic spectrum, and a downfield shift of the bridge-head carbons and an upfield shift of the other cyclopentadienyl carbons in the
13C-NMR spectrum. Compounds
9–
12 also showed complexing affinity to silver ion according to the size of polythia-macrocycles.
View full abstract
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Masahide Noji, Kyoko Achiwa, Asami Kondo, Yoshinori Kidani
1982 Volume 11 Issue 11 Pages
1757-1760
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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High performance liquid chromatography of antitumor Pt(II) complexes of 1
R,2
R-cyclohexandiamine, as well as
cis- and
trans-DDP, dichlorodiammineplatinum(II), has been performed, using a Toyo Soda G1000PW column, eluting with 0.1 mol dm
−3 Na
2SO
4, and various Pt(II) complexes were separated successfully.
View full abstract
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Masao Nakazaki, Hiroaki Chikamatsu, Masatoshi Taniguchi
1982 Volume 11 Issue 11 Pages
1761-1764
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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HLADH mediated reduction differentiated between the enantiotopic carbonyl groups in
cis-decalin-2,7-dione (
1) provide (−)-(7
S,9
S,10
R)-7-hydroxy-
cis-decalin-2-one (
3) which was converted, via (+)-
4, and (+)-
6, into (+)-twistane (
8) of high optical purity.
View full abstract
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Yoji Tachibana, Makoto Ando, Hiroyoshi Kuzuhara
1982 Volume 11 Issue 11 Pages
1765-1768
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Diverse α-keto acids were transformed into the corresponding α-amino acids with enantiomeric excesses ranging from 60 to 96% by the reaction with chiral pyridoxamine analog, (
R)- or (
S)-15-aminomethyl-14-hydroxy-5,5-dimethyl-2,8-dithia [9] (2,5)pyridinophane (
4), and Zn
2+ in the molar ratio of 2:1, in methanol. The use of the S enantiomer of
4 gave (
R)-α-amino acids, and vice versa.
View full abstract
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Yoji Tachibana, Makoto Ando, Hiroyoshi Kuzuhara
1982 Volume 11 Issue 11 Pages
1769-1772
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Asymmetric induction in the nonenzymatic transamination from the chiral pyridoxamine analog (
1) to the α-keto acids in the presence of a limited amount of zinc ion can be explained by the kinetically controlled stereoselective protonation to the carbanion formed in an octahedral Zn
2+ chelate intermediate during the reaction.
View full abstract
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Masaya Okamoto, Yuzo Nishida, Sigeo Kida
1982 Volume 11 Issue 11 Pages
1773-1776
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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New binucleating ligands containing a porphyrin and another coordination site in close proximity, and their metal complexes were prepared and characterized.
View full abstract
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Juzo Nakayama, Toko Fujita, Masamatsu Hoshino
1982 Volume 11 Issue 11 Pages
1777-1780
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Reactions of benzyne with
o- and
p-(alkylthio)benzoic acids afford alkyl
o- and
p-(phenylthio)benzoates in varied yields, while reaction with
o-(phenylthio)methylbenzoic acid gives phthalide and diphenyl sulfide in good yields.
View full abstract
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Kenichiro Nakashima, Shin’ichi Nakatsuji, Shuzo Akiyama, Takahir ...
1982 Volume 11 Issue 11 Pages
1781-1782
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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A new method for the spectrophotometric determination of Li(I) with a “crowned” dinitrophenylazophenol is proposed, with a range between 25 and 250 ppb of Li(I) in chloroform-dimethylsulfoxide-triethylamine. The method shows both an excellent sensitivity and a fairly good selectivity, and is applied satisfactorily for the analysis of commercial preparations, e.g., lithium carbonate (tablet).
View full abstract
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Makoto Onaka, Koji Ishikawa, Yusuke Izumi
1982 Volume 11 Issue 11 Pages
1783-1786
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Potassium cation exchanged X and Y type zeolites are found to work as efficient bases in N-alkylation of aniline with an alkylating reagent in benzene. The intrinsic pore structures of X and Y zeolites are responsible for the high selectivity in N-monoalkylation of aniline.
View full abstract
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Shuji Tomoda, Yoshito Takeuchi, Yujiro Nomura
1982 Volume 11 Issue 11 Pages
1787-1790
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Nitrones reacted with ketene silyl acetals at room temperature to afford β-siloxyamino esters in high yields. The stereochemistry of the products was assigned on the basis of NMR spectral data. A mechanism involving initial silicon transfer from ketene silyl acetals to nitrones has been proposed.
View full abstract
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Tadashi Okawara, Kentaro Nakayama, Mitsuru Furukawa
1982 Volume 11 Issue 11 Pages
1791-1794
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The reactions of N-monosubstitued thioureas (
1) with β-haloacyl halides (
2) were carried out in 5% NaOH–CH
2Cl
2 in the presence of a phase transfer catalyst to afford
N-thioamido-β-lactams (
3 and
5), thioureido acids (
4), and 5-hydroxy-2-thiohexahydropyrimidin-4-ones (
6). The compounds,
3 and
4, were readily converted to 5,5-dimethyl-2-thiohexahydropyrimidin-4-ones (
7) with 6N HC1.
View full abstract
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Tamotsu Fujisawa, Masashi Takeuchi, Toshio Sato
1982 Volume 11 Issue 11 Pages
1795-1798
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The use of 3-alkenoate as a masked synthon of 4-oxo-2-alkenoate was established by a three step conversion of 3-nonenoate into 4-oxo-2-nonenoate through epoxidation, isomerization to an allyl silyl ether, and oxidation in a high overall yield. This method was applied to the short step synthesis of pyrenophorin from 7-oxo-3-octenoic acid.
View full abstract
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Tadashi Kikukawa, Motomasa Imaida, Akira Tai
1982 Volume 11 Issue 11 Pages
1799-1802
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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In order to establish the stereochemistry of the sex attractant of
diprion species of pine sawflies, two candidate epimers, (2
S,3
R,7
R)-and (2
S,3
R,7
S)-3,7-dimethylpentadecan-2-ol were synthesized by the coupling reaction of optically active C
5 and C
12 units. The C
12 units, (
R)-(−)-and (
S)-(+)-1-bromo-2-methyludecane were prepared from (
R)-(+)-pulegone. The C
5 unit, (2
R,3
S)-2-methyl-3-tetrahydropyranoxy-1-tosyloxybutane was derived from (2
S,3
S)-2-methyl-3-hydroxybutyric acid prepared by the reported prodedure.
View full abstract
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Hiroshi Miura, Masashi Osawa, Tsutomu Suzuki, Kazuo Sugiyama, Tsuneo M ...
1982 Volume 11 Issue 11 Pages
1803-1804
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The dehydrogenation of cyclohexane, accompanying hydrogenolysis, was studied over well characterized Pt–Ru/Al
2O
3 catalysts. For dehydrogenation synergistic effect was clearly observed, whereas for hydrogenolysis simple dilution effect was observed.
View full abstract
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Yutaka Morikawa, Katsuhiko Takagi, Yoshihiko Moro-Oka, Tsuneo Ikawa
1982 Volume 11 Issue 11 Pages
1805-1808
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Cu ion exchanged form of fluor tetra silisic mica (Cu-TSM) is remarkably active and selective for the dehydrogenation of methanol to methyl formate. The exclusive activity of Cu-TSM is caused by both no acidity of TSM itself and the high resistivity of exchanged Cu ions against the reduction to Cu metals. Cu-TSM eclipsed the patent catalysts especially by the selective activity.
View full abstract
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Nobuo Nakamura, Motomichi Kohno, Michinori Oki
1982 Volume 11 Issue 11 Pages
1809-1810
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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1H NMR spectra of the adducts of 9-trimethylsilylanthracene with dimethyl acetylenedicarboxylate and
p-quinone are temperature dependent, indicating slow rotation about silicon-to-carbon single bonds, while that of 1,4-dimethoxy-9-trimethylsilyltriptycene is indicative of completely frozen conformation with respect to the Si–C(9) bond.
View full abstract
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John H. Freudenberger, Yasushi Matsui, Milton Orchin
1982 Volume 11 Issue 11 Pages
1811-1814
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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At room conditions in the presence of alcohols, HCo(CO)
4 instead of being consumed by vinyl ethers, functions as an acid catalyst for acetal formation.
View full abstract
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Takao Ikariya, Yasutoshi Ishikawa, Kiyomiki Hirai, Sadao Yoshikawa
1982 Volume 11 Issue 11 Pages
1815-1818
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The palladium complexes such as Pd(PPh
3)
4 and Pd(PhCN)
2Cl
2 catalyzed the rearrangement of allylic
N-phenylformimidates to give
N-allyl-
N-phenylformamides under a mild condition. The reaction courses are strongly influenced by the oxidation state of palladium complexes used.
View full abstract
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Katsuramaru Fujita, Etienne Moret, Manfred Schlosser
1982 Volume 11 Issue 11 Pages
1819-1822
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Upon treatment with dimethyltitanium dichloride or trimethylaluminum in the presence of titanium tetrachloride, a hydrogen atom at the olefinic 4-position is replaced by a methyl group. Terminal homoallyl alcohols afford (
E)-isomers. If the double bond is an internal one, the carbon chain (at the other side of the hydroxy group) leaves its original position to the entering methyl group and switches to the other one at the same carbon atom.
View full abstract
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Tsutomu Sakakibara, Tomoko Hamakawa
1982 Volume 11 Issue 11 Pages
1823-1824
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Intermediates in the reaction of
N,
N-dimethylanilines with palladium (II) acetate were trapped by acetate ion or oxygen to give N-methyloxygenated and demethylated products, while the trapping by other anilines gave homo- and cross-coupling cyclodimers. The reactions proceed via radical cation formation induced by the palladium salt.
View full abstract
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Ewa Lipczynska-Kochany, Hiizu Iwamura
1982 Volume 11 Issue 11 Pages
1825-1828
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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A methanol solution of
N-methylanthranilohydroxamic acid showed a reversible increase and an eventual oscillation of fluorescence intensity during continued excitation at 370 nm in a spectrofluorometer.
View full abstract
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Sigeru Torii, Hideo Tanaka, Takashi Siroi, Michio Sasaoka, Norio Saito ...
1982 Volume 11 Issue 11 Pages
1829-1832
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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An electrochemical S-S bond fission of 4-(2-benzothiazolyldithio)azetidinones derived from penicillin G has been achieved by the selection of an appropriate electrolysis system, providing either 2β-halomethylpenicillins, 3β-halocephams, or 4-methoxysulfinylazetidinone derivatives.
View full abstract
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Shuichi Naito, Kenzi Tamaru
1982 Volume 11 Issue 11 Pages
1833-1836
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The reduction of nitric oxide to ammonia was examined in an aqueous KOH solution of Rh
6(CO)
16 or Rh
4(CO)
12 complex. It is confirmed that the water gas shift reaction is incorporated with this reaction, providing hydrogen for ammonia formation.
View full abstract
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Nobuyasu Enoki, Ryoichi Ishida, Shiro Urano, Masamitsu Ochi, Takashi T ...
1982 Volume 11 Issue 11 Pages
1837-1840
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Four new diterpenes have been isolated from a Japanese brown alga and their structures have been shown to be expressed by
2,
3,
4 and
5, on the basis of spectral and chemical means.
View full abstract
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Shigeo Ohnishi, Takashi Nogami, Hiroshi Mikawa
1982 Volume 11 Issue 11 Pages
1841-1842
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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A new electron donor molecule, anthra[1,9-
cd:4,10-
c′
d’]bis[1,2]diselenole, was synthesized. The charge-transfer complex formed between the donor and TCNQ showed the electrical conductivity of 1 (Ω cm)
−1 for a compressed pellet sample.
View full abstract
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Kagetoshi Yamamoto, Shoko Yamazaki, Yasuji Kohashi, Atsuhito Matsukawa ...
1982 Volume 11 Issue 11 Pages
1843-1846
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Various 4- and 4,5-substituted 2,7-di-
tert-butylthiepins such as 4-ethoxycarbonyl-(
6), 4-formyl- (
7), 4-hydroxymethyl- (
8), 4-methyl- (
12), 4-methy1-5-hydroxymethy1-(
13), and 4,5-dimethyl derivatives (
16), and so on, were synthesized by functional group transformation and some of their properties were examined.
View full abstract
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Junzo Tanaka, Koichiro Takahashi, Yoshiyuki Yajima, Masayuki Tsukioka
1982 Volume 11 Issue 11 Pages
1847-1850
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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The homogeneous sample of (La
0.8Ca
0.2)MnO
3 was prepared by the coprecipitation method and its lattice constants were determined by X-ray powder diffraction to be a=c=7.759Å, b=7.745Å and β=90.3°. The homogeneity of the distribution of ions can be seen in the narrow half-widths of X-ray reflections.
View full abstract
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Shigeru Nishiyama, Tomoko Suzuki, Shosuke Yamamura
1982 Volume 11 Issue 11 Pages
1851-1852
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Bastadin-6, a 28-membered ring lactam, was synthesized from the known bis-
p-methoxybenzyl bastadin-2 in 6 steps.
View full abstract
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Hiroshi Nishida, Yoshiki Katayama, Hideto Katsuki, Hiroshi Nakamura, M ...
1982 Volume 11 Issue 11 Pages
1853-1854
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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N-(4-methylumbelliferone-8-methylene)-monoaza-15-crown-5 (
1) and -18-crown-6 (
2) extracted most efficiently lithium and potassium, respectively, from aqueous solution to 1,2-dichloroethane. The similar fluorescent crown ether derived from diaza-18-crown-6 (
3) was selective to calcium. The fluorimetric determination of lithium and calcium was feasible by using
1 and
3, respectively.
View full abstract
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Hideki Sakurai, Yasuhiro Nakadaira, Hiromi Tobita
1982 Volume 11 Issue 11 Pages
1855-1858
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Tetramethyldigermene, generated for the first time by pyrolysis of 1,4-diphenyl-2,3-benzo-7,7,8,8-tetramethyl-7,8-digermabicyclo[2.2.2]octadiene, was successfully trapped by [4+2] cycloaddition with anthracene and 1,1-dimethyl-2,5-diphenyl-1-silacyclopentadiene.
View full abstract
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Yoshinori Naruta, Yoshihiro Arita, Naoshi Nagai, Hidemitsu Uno, Kazuhi ...
1982 Volume 11 Issue 11 Pages
1859-1862
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
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Introduction of 2,4-pentadienyl side chain to halogenated
p-quinones is performed with (2,4-pentadienyl)trimethylstannane to afford 2-halo-3-(2,4-pentadienyl)-1,4-quinones. Pyrolytic decomposition of the corresponding azidoquinones derived from the obtained haloquinones affords 3
H-pyrrolo[1,2-
a]indol-5,8-dione derivatives in good yields.
View full abstract
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Ryuichi Sugimoto, Hiroharu Suzuki, Yoshihiko Moro-Oka, Tsuneo Ikawa
1982 Volume 11 Issue 11 Pages
1863-1866
Published: November 05, 1982
Released on J-STAGE: March 27, 2006
JOURNAL
FREE ACCESS
Novel dinuclear rhodium dioxygen complexes having olefinic ligand are prepared by the reaction of cationic rhodium diene complexes, [(1,5-cyclooctadiene)
2Rh]
+Y
− or [(norbornadiene)
2Rh]
+Y
− (Y
− = BF
4−, ClO
4−), with potassium superoxide in dichloromethane.Transfer of the dioxygen ligand to the coordinated olefin is confirmed by pyrolysis of the complex under an atmosphere of
18O
2.
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