Chloroform → HCID 21506608, compound

Participants

Reaction Steps

4.48 g. of α-(3,4,5-trimethoxybenzamido)-N-[2-hydroxy-2-(3,4-dimethoxyphenyl)-ethyl]-acetamide [producible from 2-(3,4-dimethoxyphenyl)-2-hydroxyethylamine and 3,4,5-trimethoxybenzamidoacetyl chloride] is allowed to stand in 100 ml. of chloroform with 6.2 g. of phosphorus pentachloride for 3 days at 20°. The mixture is decomposed with ice water and washed several times with NaHCO3 solution. The chloroform solution is evaporated. The thus-obtained crude 1-(3,4,5-trimethoxybenzamidomethyl)-6,7-dimethoxy-isoquinoline is taken up in 50 ml. of methanol, combined with 400 mg. of PtO2, and hydrogenated at 20° and under normal pressure. The product is filtered and evaporated. Chromatography on silica gel (with chloroform/methanol 19:1) yields 1-(3,4,5-trimethoxybenzamidomethyl)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline; hydrochloride, m.p. 234°-236°.

Provenance & Evidence