Facile Synthesis of 7‐Methoxy‐2‐aryl‐3‐phenyl/or‐H‐8‐[2‐(4,6‐dimethyl‐3,5‐dicarbethoxy‐pyridyl)]‐4H‐1‐benzopyran‐4‐ones

Abstract

Condensation of 8‐formyl‐7‐methoxy‐2‐phenyl‐4H‐1‐benzopyran‐4‐ones (5a–f) with ethyl‐3‐aminocrotonate (6) in glacial acetic acid under Hantzsch conditions afforded 7‐methoxy‐2‐aryl‐3‐phenyl/or‐H‐8‐[2‐(4,6‐dimethyl‐3,5‐dicarbethoxy‐pyridyl)]‐4H‐1‐benzopyran‐4‐ones (7a–f) in good yields.

Keywords:

• 4H‐1‐benzopyran‐4‐ones
• pyridylfarones