Trimethyl borate → 7-Amino-3-methoxymethyl-3-cephem-4-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

To 10 ml of sulfolane were added 1.41 g of 7-ACA, 0.93 g of ferric chloride, 5.25 g of zinc chloride and 3.13 ml of trimethyl borate. The mixture was heated at 50° C. for 5 hours to advance a reaction. 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 0.89 g. The yield of the desired product was 70%.

Provenance & Evidence