1,2-Ethanediamine, N1,N1-bis(1-methylethyl)- → N-(2-diisopropylaminoethyl)-6,7-dimethoxy-1-(3,4-dimethoxyphenyl)-3,4-dihydro-2(1H)-isoquinolinecarboxamide

Participants

Reaction Steps

4.0 Parts of 2-diisopropylaminoethylamine in 75 parts of chloroform is added portionwise, at room temperature, to a mixture of 8.0 parts of 6,7-dimethoxy-1-(3,4-dimethoxyphenyl)-3,4-dihydro-2(1H)-isoquinolinecarbonyl chloride and 15 parts of triethylamine in 225 parts of chloroform. After the addition is complete, the mixture is stirred for 3 to 4 hours, allowed to stand overnight, and then washed with water. The chloroform layer is separated, dried over anhydrous calcium sulfate and concentrated under reduced pressure. The solid material obtained in this manner is crystallized from ether to give N-(2-diisopropylaminoethyl)-6,7-dimethoxy-1-(3,4-dimethoxyphenyl)-3,4-dihydro-2(1H)-isoquinolinecarboxamide, melting at about 114°-115°C.

Provenance & Evidence