反应详情

To 10 ml of dichloromethane were added 1.41 g of 7-ACA, 2.18 g of concentrated sulfuric acid and 1.88 ml of trimethyl borate. The reaction was conducted at 0° C. for one hour. After completion of the reaction, substantially the same procedure as in Example 1 was repeated, to thereby obtain the desired product, namely 7-amino-3-methoxymethyl-3-cephem-4-carboxylic acid. The amount of the desired product was 0.63 g. The yield of the desired product was 50%.

1. customAfter completion of the reaction