AN EFFICIENT APPROACH FOR THE ONE-POT SYNTHESIS OF ETHYL 4-OXO-4H-BENZOd1,3OXAZINE-2-CARBOXYLATES

摘要

Simple one-pot synthesis of ethyl 4-oxo-4H-benzod1,3oxazine-2-carboxylates is described by condensation reaction of anthranilic acid derivatives with ethyl 2-chloro-2-oxoacetate in CHCl3. High yields of the products obtain in high purity with simple work-up.