Method of preparation of 3-methylenecephams

Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent

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Details

424246, 260239A, 544 16, C07D50102

Patent

active

040523870

ABSTRACT:
Penicillin sulfoxide derived azetidinone sulfinyl chlorides and related sulfinic acid derivatives are cyclized to 3-methylenecephams by reaction with Friedel-Crafts catalysts or metathetic cation forming agents.

REFERENCES:
patent: 3960851 (1976-06-01), Kukolja et al.

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