1-(2-Chloroethyl)piperidine → 2-(2-Chlorophenyl)-4-(piperidin-1-yl)butanenitrile

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The present invention relates to a novel process for the preparation of N-heterocyclealkanamide derivatives having the following formula: ##STR1## which comprises reacting 1-(2-chloroethyl)piperidine with 2-chlorobenzeneacetonitrile to give (±)-α-(2-chlorophenyl)-1-piperidinebutanenitrile; alkylating the piperidenebutanenitrile to give (±)-α-(2-chlorophenyl)-α-(2,2-dimethoxyethyl)piperidine-1-butanenitrile; hydrolyzing the resulting alkylated piperidinebutanenitrile to give (±)-α-(2-chlorophenyl)-α-(2-oxoethyl)piperidine-1-butanenitrile; reacting the resulting piperidinebutanenitrile with isopropylamine to form (±)-α-(2-chlorophenyl)-α-[2-[(1-methylethyl)imino]ethyl]piperidine-1-butanenitrile; reducing the resulting imine to form (±)-α-(2-chlorophenyl)-α-[2-[(1-methylethyl)amino]ethyl]-piperidine-1-butanenitrile; acetylating the resulting amine to form (±)-N-[3-(2-chlorophenyl)-3-cyano-5-(1-piperidinyl)pentyl]-N-(1-methylethyl)acetamide; hydrolyzing the resulting acetylated amino substituted piperidine butanenitrile to form (±)-α-[2-[acetyl(1-methylethyl)amino]ethyl]-α-(2-chlorophenyl)-1-piperidinebutanamide; and isolating the resulting piperidinebutanamide.

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