Solvent-free synthesis of novel 5-oxo-5H-chromeno[4,3-b]pyridine derivatives
摘要:
An efficient and simple method for the synthesis of new 5-oxo-5H-chromeno[4,3-b]pyridine derivatives via Michael addition of 4-aminocoumarin to arylidenemalononitrile for 20 min at 150A degrees C without any solvent is proposed. The advantages of this procedure are mild reaction conditions, high yields of products, and operational simplicity.