Patent ID: 7951952

Claim:
A process for the preparation of N-aminopiperidine of formula (I): or a salt thereof, comprising the steps of: a) reacting a carbazate of formula (II): NH 2 —NH—COOR (II) in which R represents a (C 1 -C 6 )alkyl group, a phenyl or a benzyl, with a 1,5-dihalopentane of formula (III): Hal-(CH 2 ) 5 -Hal (III) in which Hal represents a halogen atom to obtain piperidin-1-ylcarbamate of formula (IV): in which R is as defined above; b) treating the piperidin-1-ylcarbamate thus obtained in basic medium to produce the compound of formula (I); and c) reacting the compound of formula (I) taken in a solvent with a suitable inorganic or organic acid to form the salt of the compound of formula (I).