Hydrochloric Acid → (R)-5-(5-amino-2-fluoro-phenyl)-5-methyl-morpholine-3-thione hydrochloride

Participants

Reaction Steps

A solution of (R)-5-[5-(benzhydrylidene-amino)-2-fluoro-phenyl]-5-methyl-morpholin-3-thione (0.795 g, 1.97 mmol) in dioxane (10 ml) was treated dropwise at room temperature with hydrochloric acid (1M). The yellow reaction mixture was stirred at room temperature overnight. For the workup, the solution was evaporated at reduced pressureand. The yellow oil was dissolved in ether (15 ml), and the solution was extracted with hydrochloric acid (1M, 15 ml). The aqueous layer was extracted with ether (15 ml), then the combined organic layers were extracted with hydrochloric acid (1M, 5 ml). The combined aqueous layers were evaporated at reduced pressure and yielded the (R)-5-(5-amino-2-fluoro-phenyl)-5-methyl-morpholine-3-thione hydrochloride as a yellow solid (0.47 g, 87%) which was pure enough to be engaged in the next step without further purification; (calculated) C11H13FN2OS [240.30]; (found) [M+H]+=241.

Provenance & Evidence