Patent ID: 7838681

Claim:
A process for the synthesis of a heterocyclic compound, wherein the process comprises the opening of a compound of formula I: in which, X represents NH, or an N-p group, p being a protective group, Y represents N, O or S, Z represents NH 2 or NH-p, and R 1 represents a C 1 -C 6 alkoxy radical, an aryloxy radical, optionally being substituted, or a salt or isomer of the compound, said stage of opening being carried out under conditions resulting in a heterocycle of formula II: in which, X, Y and Z are as defined above, and R 2 represents a free allylamine chain or an allylamine chain protected in the carbamate form, —CH═CH—CH 2 —NH 2 R 1 , allylamide —CH═CH—CH 2 —NH—COR 1 or group, R 3 occupying one, two or three positions and representing a halogen.