A versatile new synthesis of quinolines and related fused pyridines. Part 11. Conversion of acylanilides into α-iminopyridines
Abstract
The Vilsmeier formylation of enamidines, readily derived by treatment of acetanilides with PCl5, allowed the synthesis of 6-chloro-1-aryl-2-iminopyridines. Similarly other acylanilides (RCH2CONHAr) gave 3,5-R2 disubstituted analogues.