Access to benzo[e][1,3]thiazin-4-ones via PCy3-mediated annulations of benzo[c][1,2]dithiol-3-ones with iso(thio)cyanates

Herein, we describe a novel organophosphine-mediated annulation reaction of benzo[c][1,2]dithiol-3-ones with iso(thio)cyanates, which proceeds via an S atom to C-N unit exchange strategy. The methodology efficiently produced a variety of...