ChemInform Abstract: Novel 2‐Methyl‐1‐oxacephalosporins. Part 2. Synthesis of 3‐Substituted 2‐Methyl‐1‐oxacephem Nucleus.

Abstract

The diazomethyl ketone (II), prepared from the carboxylate (I), reacts with hydrochloric acid, acetic acid, and mercapto heterocycles (III) to produce the derivatives (IV).