Synthesis of 1-aryl-1, 2-dihydronaphtho [1, 2-e][1, 3] oxazine-3-ones in the presence of ascorbic acid as a catalyst

To our best knowledge, there are only a few methods available for the synthesis of substituted 1 aryl1, 2 dihydronaphtho [1, 2 e][1, 3] oxazin3ones, which involves either toxic chemicals or long reaction time [2, 3]. Hence, there is still scope for the development of milder, safer, economical, and more efficient synthetic protocols for the preparation of aromaticfused oxazinones. The catalytic potential of ascorbic acid in the synthesis of aromaticfused 1 aryl1, 2 dihydronaphtho [1, 2 e][1, 3] oxazine3one derivatives (Scheme1) has been investigated.