Thiapentanamide derivatives

摘要

A compound of the general formula <IMAGE> (I) in which X represents a chlorine or bromine atom, R1 represents a hydrogen atom, a C(1-6) alkyl group, a benzyl group or a phenyl group optionally substituted by a C(1-6) alkyl group, and R2 represents the group CN or the group COOR3 in which R3 represents a C(1-6) alkyl group, a process for the preparation of a compound of formula (I), and the use of a compound of formula (I) in the preparation of a compound of the general formula. <IMAGE> (IV) in which R1 is as defined above and R4 represents an amino group or a hydroxyl group.