Diisopropylethylamine → N-(1-benzyloxycarbonylcyclopentyl)-N-(2'-cyanobiphenyl-4-ylmethyl)-amine

Participants

Reaction Steps

A mixture of 2.72 g (10 mmol) of 4-bromomethyl-2'-cyano-biphenyl, 2.63 g (12 mmol) of 1-aminocyclopentane-carboxylic acid benzyl ester, 3.4 ml (20 mmol) of Hunig base and 10 ml of N,N-dimethylformamide is heated to 130°-140° (bath temperature) for 2 hours while stirring. After cooling, the reaction mixture is poured onto 50 ml of ice/water. Extraction using ethyl acetate yields the crude N-(1-benzyloxycarbonylcyclopentyl)-N-(2'-cyanobiphenyl-4-ylmethyl)-amine, which forms a hydrochloride melting between 180° and 182° (ethanol/diethyl ether).

Provenance & Evidence