Facile and Efficient Synthesis of Novel Oxazine, Oxazepine and Phenoxazine of Chromenones Fused with 1,4-Naphthoquinone

Heterocycles, Volume 77, Issue 1 ( January, 1, 2009 ), Pages 611-615         DOI: 10.3987/COM-08-S(F)30 Vishnu K. Tandon and Hardesh K. Maurya

A series of novel mono ethers 5, 7, diethers 6, 8, 9, oxazine 10, oxazepine 11 and phenoxazines 12 of chromenones fused with 1,4-naphthoquinone have been synthesized.