Abstract

A simple and proficient method for the synthesis of 1,3-benzoxazine derivatives via three-component reaction of isocyanide and isoquinoline with 1-(6-hydroxy-2-isopropenyl-1-benzofuran-yl)-1-ethanone or 4-hydroxycumarine in water in the presence of piperidine at 70°C is reported.

Keywords: 1-(6-hydroxy-2-isopropenyl-1-benzofuran-yl)-1-ethanone, 1, 3-benzoxazine, Isocyanide, isoquinoline, threecomponent reaction.