7-Amino-3-(5-methyl-1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid → 7-[2-Methoxyimino-2-(1,2,3-thiadiazol-4-yl)acetamido]-3-(5-methyl-1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid

Participants

Reaction Steps

2-Methoxyiminio-2-(1,2,3-thiadiazol-4-yl)acetic acid (anti isomer) (1.0 g.) and 7-amino-3-(5-methyl-1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid (2.16 g.) were reacted according to similar manners to those of Examples 1(b) and 8 to give pale yellow powder of 7-[2-methoxyimino-2-(1,2,3-thiadiazol-4-yl)acetamido]-3-(5-methyl-1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid (anti isomer) (1.68 g.), mp 104° to 115° C. (dec.).

Provenance & Evidence