Patent ID: 8193210

Claim:
Compounds of general formula I: wherein: R is F, CI, Br, I, —N3, —COOR′, —CONR′R″, or —NHR′″—NR′R″, in which R′, R″ and R′″ are each independently H, alkyl, aryl, arylalkyl, acyl, alkoxycarbonyl, or aryloxycarbonyl; R1 is hydrogen, alkyl, aminoalkyl, hydroxyalkyl, nitrile, alkoxymino, aryloxymino, or silylalkyl; R2 is hydrogen, hydroxyl, alkoxy, or aminoalkyl; R3 is hydrogen, optionally protected hydroxyl, alkoxy, or aminoalkyl; wherein the alkyl, acyl, alkoxy, aminoalkyl or alkoxymino groups contain 1 to 8, carbon atoms, in a straight or branched chain, and the aryl and aryloxy groups contain 5 to 10 carbon atoms; and the pharmaceutically acceptable salts, isomers, enantiomers, diastereomers thereof and corresponding mixtures.