K. Petrova, O. Petrov, A. Antonova
2003
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0
Influential Citations
2
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Journal
Heterocyclic Communications
Abstract
Derivatives of a new type tricyclic system having a 1,4-benzothiazine skeleton are described. The reaction of l-(2-mercaptophenyl)-2//-imidazol-2-ones 2 with excess formaldehyde in acid medium resulted in the formation of 2,4-dihydro-lH-imidazo[5,l-c][l,4]benzothiazin-l-one 3. The starting compounds 2 were prepared by a modification of a previously described method of ring transformation of 3-(2-oxopropyI)-2(3//)-benzothiazoIones in reactions with primary amines.