| abstract |
Process for the synthesis of a compound of formula (I) below: in which: R1 and R2 represent, independently of each other, an N-protecting group; R3 represents a hydrogen atom, a C1-alkyl group; C6, aryl (C1-C6) alkyl, C2-C6 alkenyl, or alkoxycarbonylalkyl; Y is -C (HR4) - wherein R4 is hydrogen, a group C1 to C6 alkyl, aryl, aryl C1 to C6 alkyl, or C2 to C6 alkenyl; oran ortho-phenylene group. |