2-Aminocyclohepta-2,4,6-trien-1-one → HCID 54712695, compound

Participants

Reaction Steps

A solution of methyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (3.0 g) and 2-amino-2,4,6-cycloheptatrien-1-one (1.6 g) in xylene (100 ml) is refluxed for 8 hours. The reaction mixture is then allowed to stand at room temperature for 15 hours. The crystals that have separated out are collected by filtration, washed with toluene and recrystallized from dimethylformamide to give 4-hydroxy-2-methyl-N-(1-oxo-2,4,6-cycloheptatrien-2-yl)-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide (0.68 g), m.p. 259°-261° C.

Provenance & Evidence