反应详情

By condensation of 1,7-dichloro-4-methyl-9-thioxanthenone with 2-(diethylamino)ethyl hydrazine was obtained 9-chloro-2-(2-(diethylamino)ethyl)-5-methyl-2H(1)benzothiopyrano[4,3,2-cd]indazole. To 0.13 g. of this base in acetone (3 ml.) was added 30% aqueous hydrogen peroxide (0.2 ml.). After 18 hours at room temperature the solution was evaporated to dryness under reduced pressure and the residue crystallized from acetone to give 9-chloro-2-(2-(diethylamino)ethyl)-5-methyl-2H(1)benzothiopyrano[4,3,2-cd]indazole N-oxide monohydrate, m.p. 134°-135° (decomp.).