Bromination of sydnones. II Bromination of 3‐(2‐aminophenyl)sydnone and related compounds

Abstract

Abstract Bromination of 3‐(2‐aminophenyl)sydnone 2 under a variety of conditions is reported. The products obtained are interrelated by a series of subsequent reactions. One major product is the bromoaryl compound 8 , the first example of bromination on the aryl rather than sydnone ring when the two are in competition. Surprisingly, bromoaminosydnone 9 , prepared from its nitro analogue, was not among the products obtained by direct bromination of 2.