11. Anil‐Synthese. 16. Mitteilung. Über die Herstellung von styryl‐derivaten des 2‐phenyl‐imidazo [1,2‐<i>a</i>]pyridins

Abstract

Preparation of styryl derivatives of 2‐phenyl‐imidazo [1, 2‐ a ]pyridine 2‐( p ‐Tolyl)‐imidazo [1, 2‐ a ]pyridines and 7‐methyl‐2‐phenyl‐imidazo [1,2‐ a ]‐pyridines can be converted, in dimethylformamide, on reaction with anils of aromatic aldehydes in the presence of potassium hydroxide or potassium t ‐butoxide, into the corresponding 2‐(stilben‐4‐yl)‐ and 2‐phenyl‐7‐styry1‐imidazo [1, 2‐ a ]‐pyridines (‘Anil‐Synthesis’). The 2‐( p ‐tolyl)‐imidazo [1,2‐ a ]pyridines react far less readily than the 7‐methyl‐2‐phenyl‐imidazo[1,2‐ a ]pyridines.