반응 #214084

반응 방정식

7β-[2-(2-carbobenzoxyamino-5-fluoro-4-thiazolyl)-2-hydroxyiminoacetamido]-3-cephem-4-carboxylic acid diphenylmethyl ester

diazomethane

→

7β-[2-(2-carbobenzoxyamino-5-fluoro-4-thiazolyl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylic acid diphenylmethyl ester

용매

dichloromethane

ether

반응 조건

후처리

1. 1
   농축the reaction mixture is concentrated

실험 절차

To a solution of 7β-[2-(2-carbobenzoxyamino-5-fluoro-4-thiazolyl)-2-hydroxyiminoacetamido]-3-cephem-4-carboxylic acid diphenylmethyl ester (180 mg) in dichloromethane (3 ml) is added a solution of diazomethane in ether until yellow color of the solution does no more fade out. After 30 minutes, the reaction mixture is concentrated to give 7β-[2-(2-carbobenzoxyamino-5-fluoro-4-thiazolyl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylic acid diphenylmethyl ester (153 mg). Similarly prepared are compounds of Table 1.

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