Phosphorus in Organic Synthesis. XII. Amino Acids and Peptides. XXII. Reaction of Penicillin Sulfoxides with Diethyl Phosphorocyanidate (DEPC)

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概要

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• Reaction of penicillin sulfoxides with diethyl phosphorocyanidate (DEPC) was investigated. Treatment of benzylpenicillin (S)-sulfoxide methyl ester (4a) with a slight excess of DEPC in N, N-dimethylacetamide gave the 3-cephem (5a), the 2-cephem (6a). and the 3-methylenecepham (7a) in 22,4,and 4% yields, respectively. Increase of the quantity of DEPC to a three or five fold excess increased the yield of the 3-cephem (5a). Phenoxymethylpenicillin (S)-sulfoxide methyl ester (4b) also afforded the 3-cephem (5b) and the 3-methylenecepham (7b) under analogous reaction conditions as above, while phthalimidopenicillin (R)-sulfoxide methyl ester (8) furnished the 3-cephem (9) and the isothiazolones (10 and 11).

• 公益社団法人日本薬学会の論文
• 1976-11-25

著者

• 山田 俊一

  Faculty of Pharmaceutical Sciences, University of Tokyo

• 塩入 孝之

  Faculty of Pharmaceutical Sciences, Nagoya City University

• 山田 俊一

  Faculty Of Pharmaceutical Sciences University Of Tokyo

• 塩入 孝之

  Faculty Of Pharmaceutical Sciences Nagoya City University

• 二宮 邦博

  Faculty of Pharmaceutical Sciences, University of Tokyo

• 二宮 邦博

  Faculty Of Pharmaceutical Sciences University Of Tokyo

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