Aroylnitrile oxide cyclizations. 1. Synthesis of (3-aroyl-1,2,4-oxadiazol-5-yl)acetic acids

Intrermolecular cyclization of 1,3-dipolar aroylnitrile oxides to malononitrile provided a viable approach to a variety of novel (3-aroyl-1,2,4-oxadiazol-5-yl)acetic acid derivatives.