Cephem and pyrrolo[2,1-b][1,3]thiazine-4,6-dione ring systems construction from 6-benzoyl-2,3-dihydro-4h-1,3-thiazine-4-ones prepared via rearrangement of 5-benzoyl-3(2h)-isothiazol-3-ones

摘要

Cephem and Pyrrolo[2,1-b][1,3]thiazine-4,6 dione ring systems' construction from 6-benzoyl-2,3-dihydro-1,3-thiazine-4-ones prepared from properly designed 5-benzoyl-, 3(2H)-isothiazol-3-ones through experimental simple reactions, is described here. Keywords : 5-Benzoyl-3(2H)-isothiazol-3-ones; 6-Benzoyl-2,3-dihydro-1,3-thiazine-4-ones; Cephems; Pyrrolo[2,1-b][1,3]thiazine-4,6 diones.