NOVEL PENICILLINS AND CEPHALOSPORINS AND PROCESS FOR PRODUCING THE SAME

摘要

1508064 N-Piperazinocarbonyl-amino acid derivatives TOYAMA CHEMICAL CO Ltd 28 April 1975 [13 Aug 1974 28 Oct 1974 17 Feb 1975] 15360/77 Divided out of 1508062 Heading C2C Novel compounds I and salts and carboxyl derivatives thereof (R is an amino acid residue; R2 and R3 are H or alkyl and R2 and R3 are both linked to the same carbon atom; and A is H or an optionally substituted alkyl, alkenyl, aryl or aralkyl group) are prepared by reaction of a compound II NH 2 RCOOR1 (III) (R1 is H or a cation) with a reactive derivative of a compound IV