Formation of a benzothiazine via the reaction of ortho-halo sulfoximines with copper salts

Abstract

The formation of an interesting benzothiazine from the reaction of S-(o-halophenyl)-S-methyl sulfoximines in the presence of copper salts is reported. The overall yield is 27% over three steps from commercially available 2-halothioanisoles in the best case. The product's structure was confirmed by spectroscopic and X-ray crystal analysis. The benzothiazine shows fluorescent properties. © ARKAT-USA, Inc.