Synthesis and reactions of some new benzoaphenothiazine-3,4-dione derivatives

摘要

The reaction of 2,3-dihydro-2,3-epoxy-1,4-naphthoquinone with substituted anilines furnished the corresponding benzofusedheterocyclic derivatives. Furthermore, treatment of benzoaphenothiazine derivative with halo compounds, namely, ethyl bromoacetate, phenacyl bromide, dibromoethane, or chloroacetone afforded ether derivatives, respectively. Moreover, the reaction of with o-substituted aniline gave the corresponding benzoaphenothiazin-5-one derivatives and benzod1,3oxazin-4-one, respectively. Finally, the chromenone derivative was synthesized via the reaction of ester derivative with salicyaldhyde in refluxing pyridine. The newly synthesized compounds were characterized by spectroscopic measurements (IR, ~1H NMR, ~(13)C NMR, and mass spectra).