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Communication | Special issue | Vol 7, No. 2, 1977, pp.765-771
Published online, 1st January, 1970
DOI: 10.3987/S-1977-02-0765
Dihydroimidazobenzothiadiazine Dioxides

Richard Friary* and Elijah H. Gold

*Schering Research, 60 Orange Street, Bloomfield, New Jersey 07003, U.S.A.


Reductive cyclization of 2-methylthio-1-(2-nitrobenzenesulfonyl)-4,5-dihydroimidazolides gave a series of 1H-2,3-dihydroimidazo[1,2-b][l,2,4]benzothiadiazine 5,5-dioxides, three of which were isomerized by potassium iodide to 3H-1,2-dihydroimidazo[2,1-c][1,2,4]benzothiadiazine 5,5-dioxides.