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Your search keyword '"Yoshinobu, Yokomori"' showing total 4 results
Start Over Author "Yoshinobu, Yokomori" Publication Type Academic Journals
4 results on '"Yoshinobu, Yokomori"'

1. Novel photoreductive cyclization of 1-aryl-2-methylpropane-1,3-diones

Author

Michikazu Yoshioka, Nobuko Ishizuka, Akiko Sano, Sanae Kuwabara, Yoshinobu Yokomori, and Tadashi Hasegawa

Subjects
Ring formation (Chemistry) -- Observations, Ketones -- Analysis, Carbonyl compounds -- Research, Hydrochloric acid -- Analysis, Nuclear magnetic resonance spectroscopy -- Usage, Biological sciences, Chemistry
Abstract

2-methyl-1-phenylpropane-1, 3-dione in a 2-propanol solution yields three trioxatricyclononane isomers as Pyrex filtered mercury lamp irradiation 1,3-diketones yield 2,6, 9-trioxatricyclo(3.3.1.0)nonanes by unique photoreductive cyclization with pinacols as intermediate products. Nonanes yield bicyclooctadienes, methylenecyclopentenes and epoxycycloheptenone on acid treatment. IR spectroscopic studies reveal that three trioxatricyclononane isomers have no carbonyl or hydroxy absorption-bands.

Published
1993

3. Reaction of arynes with amino acid estersElectronic supplementary information (ESI) available: Detailed experimental procedures and analytical data. CCDC 815166. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c1cc11234a

Author

Kentaro Okuma, Nahoko Matsunaga, Noriyoshi Nagahora, Kosei Shioji, and Yoshinobu Yokomori

Subjects
CHEMICAL reactions, AMINO acids, ESTERS, PHENYL compounds, INTERMEDIATES (Chemistry), HETEROCYCLIC compounds
Abstract

An efficient route to a variety of 2-phenylindolin-3-ones from amino acid methyl esters has been developed. The reaction of amino acid methyl esters with benzyne prepared from 2-(trimethylsilyl)phenyl triflate and CsF gave 2-phenylindolin-3-ones in moderate to good yields. [ABSTRACT FROM AUTHOR]

Published
2011
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