反应详情

To a solution of 2-(2-(diethylamino)ethyl)-5-methyl-2H(1)benzothiopyrano[4,3,2-cd]indazole (0.17 g.) in acetone (4 ml.) was added 0.2 ml. of 30% aqueous hydrogen peroxide. The solution was left at room temperature overnight and then evaporated to dryness under reduced pressure. The residue was crystallized from acetone-ether to give 2-(2-(diethylamino)ethyl)-5-methyl-2H(1)benzothiopyrano[4,3,2-cd]indazole N-oxide monohydrate, m.p. 123°-124° (decomp.). This compound, when crystallized in the presence of hydrochloric acid, gave a water-soluble monohydrochloride salt which darkened and decomposed at temperatures above 150°.

1. customevaporated to dryness under reduced pressure
2. customThe residue was crystallized from acetone-ether