Zobrazeno 1 - 10 of 43 pro vyhledávání: '"Michio Sasaoka"'
1
Synthesis of 3-Hydroxycephems from Penicillin G through Cyclization of Chlorinated 4-(Phenylsulfonylthio)-2-azetidinones Promoted by a BiCl3/Sn or TiCl4/Sn Bimetal Redox System
Autor: Yutaka Kameyama, Sigeru Torii, Hideo Tanaka, Shigemitsu Nagao, Michio Sasaoka, Takashi Shiroi, M. Monnin, Masatoshi Taniguchi, Takae Yamada, Yoshihisa Tokumaru
Publikováno v: Bulletin of the Chemical Society of Japan. 68:1385-1391
A novel access to 3-hydroxycephems was attained from penicillin G via the C=C bond cleavage of 1-(1-alkoxycarbonyl-2-chloromethyl-2-propenyl)-4-(phenylsulfonylthio)-2-azetidinones by successive treatment with RuCl3/HIO4 and HIO4/CuSO4 and reductive c
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ee18ea8a5f021b3d688e41a911a2ccd
https://doi.org/10.1246/bcsj.68.1385
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7
ChemInform Abstract: Deprotection of Carboxylic Esters of β-Lactam Homologues. Cleavage of p-Methoxybenzyl, Diphenylmethyl, and tert-Butyl Esters Effected by a Phenolic Matrix
Autor: Sigeru Torii, Michio Sasaoka, Yutaka Kameyama, Takashi Shiroi, Masatoshi Taniguchi, A. Shimabayashi, Ryo Kikuchi, Shigemitsu Nagao, Hideo Tanaka, Ichiro Kawahara
Publikováno v: ChemInform. 22
p-Methoxybenzyl, diphenylmethyl, and tert-butyl esters were deprotected by gentle heating in phenol. This method of ester cleavage played an important role in β-lactam synthesis. The mechanism of the reaction is believed to involve a proton relay th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b3bcd7d2e939a4160aaf206d72592995
https://doi.org/10.1002/chin.199141095
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10
ChemInform Abstract: Synthesis of 3-Hydroxycephems from Penicillin G Through Cyclization of Chlorinated 4-(Phenylsulfonylthio)-2-azetidinones Promoted by a BiCl3/ Sn or TiCl4/Sn Bimetal Redox System
Autor: Michio Sasaoka, Hideo Tanaka, Sigeru Torii, Masatoshi Taniguchi, Yutaka Kameyama, Yoshihisa Tokumaru, Takashi Shiroi, Shigemitsu Nagao, M. Monnin, Takae Yamada
Publikováno v: ChemInform. 26
A novel access to 3-hydroxycephems was attained from penicillin G via the C=C bond cleavage of 1-(1-alkoxycarbonyl-2-chloromethyl-2-propenyl)-4-(phenylsulfonylthio)-2-azetidinones by successive treatment with RuCl3/HIO4 and HIO4/CuSO4 and reductive c
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13f671b7fc8bd609885e8e771ffb4255
https://doi.org/10.1002/chin.199539270
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