2,2-dioxo-1H-thieno[3,4-c][1,2]thiazines. Synthesis and some reactions of a new heterocycle

Article abstract of DOI:10.1002/jhet.5570350639

The first synthesis of substituted 2,2-dioxo-1-phenyl-1H-thieno[3,4- c][1,2]thiazines 2 and some of their reactions are achieved. Compounds 2 were prepared from the 3,5-dimethyl-1,1-dioxo-1,2-thiazine-4-carbaldehydes 1 by reaction with sulfur and triethyl