Hydrochloric Acid → Hydrochloric Acid

Participants

Reaction Steps

A solution of 1.5 g of 4,5-dihydro-7-oxo-8-phenyl-7H-thieno[2,3-a]quinolizine-10-carbonitrile in 15 ml of tetrahydrofuran was treated with 20 ml of a 1M BH3 /tetrahydrofuran solution and stirred at room temperature until the reaction was finished. The mixture was then acidified cautiously with 2N hydrochloric acid while cooling with ice, heated to boiling for a short time and made alkaline with 2N sodium hydroxide solution. The tetrahydrofuran was removed, in vacuo and the aqueous residue was extracted with chloroform. The organic phase was washed with saturated sodium chloride solution, dried over magnesium sulfate and evaporated. The residue was chromatographed on silica gel with chloroform/methanol (19:1). After treatment with methanolic hydrochloric acid, there was obtained pure 10-(aminomethyl)-4,5-dihydro-8-phenyl-7H-thieno[2,3-a]quinolizin-7-one hydrochloride of m.p. 254°-255°.

Provenance & Evidence