Patent ID: 8524700

Claim:
A compound of formula II: wherein Pg represents a trifluoroacetyl group; n represents a value from 1 to 6; —(C)n- represents a C 1-6 alkylidene group optionally substituted with 1 to 4 substituents selected from halogen, hydroxyl, nitro, cyano, amino, C 1-3 monoalkylamino, C 2-6 dialkylamino and C 1-3 alkoxy; R1 represents a hydrogen atom or a C 1-6 alkyl group; B represents: NR3R4, where R3 and R4 represent, independently of one another, a C 1-6 alkyl group, or a hydrogen atom; or R3 and R4 together represent a C 1-6 alkylidene group, a C 2-8 alkenylidene group, a C 1-3 alkylidene-O—C 1-3 alkylidene group, or a C 1-3 alkylidene-N(R5)—C 1-3 alkylidene group where R5 represents a hydrogen atom, or a C 1-3 alkyl or C 1-6 alkylcarbonyl group, it being possible for these C 1-3 alkyl and C 1-6 alkylcarbonyl groups to be substituted with a halogen atom, or a hydroxyl, C 1-3 alkoxy, nitro, cyano or amino group; or B represents an aminocycle, linked via a carbon atom to the group —NR1-(C)n-, said aminocycle being selected from aziridine, azetidine, pyrrolidine, piperidine and morpholine; wherein the groups R3 and R4 and also the aminocycle are optionally substituted with 1 to 4 substituents selected from a phenyl, a benzyl, a halogen, a hydroxyl, a nitro, cyano, amino, C 1-3 monoalkylamino, C 2-6 dialkylamino, C 1-3 alkyl and C 1-3 alkoxy group; and the nitrogen atom being optionally substituted with a C 1-3 alkyl; or a salt thereof.