Anil‐Synthese. 24. Mitteilung. über die Herstellung von Styryl‐ und Stilbenyl‐Derivaten des 1H‐Benzotriazols

Preparation of Styryl and Stilbenyl Derivatives of 1 H ‐Benzotriazoles 1‐( p ‐Tolyl)‐substituted 1 H ‐benzotriazoles react with anils of aromatic aldehydes in the presence of dimethylformamide and potassium hydroxide to yield the corresponding 1‐(styr‐4′‐yl)‐1 H ‐benzotriazoles and 1‐(stilben‐4′‐yl)‐1 H ‐benzotriazoles, respectively (‘anil synthesis’). Further, under the same reaction conditions, the Schiff 's bases derived from p ‐chloroaniline and 4‐(1′ H ‐benzotriazol‐1′‐yl)benzaldehydes give, with p ‐tolyl‐substituted heterocycles, the corresponding heterocyclic substituted stilbenyl derivatives.