The invention concerns compounds of formula I, wherein: R represents H, a halogen,an alkyl, a hydroxy, an alkoxy, a -COOR, -NRR,-NH-SO-AIk, -NH-CO-AIk, -NR-CO-AIk, -0-AIk-COOR,-0-AIk-NRR, -0-(CH)n-Ph, -CO-NRRor -CO-NH-CH(R)-(CH)-COOR radical；R represents H, a halogen, a cyano a -COOR, -NRR,-NH-SO-AIk, -NH-CO-CF, -NH-CO-Ph, -NH-CO-AIk, -NH-CO-AIk,-CONRR radical, an optionally substituted phenyl oran optionally substituted heteroaryl； R and R independentlyof each other represent a hydroxy, an alkoxy, a -COOR, a nitro, -NRR,-NH-CO-AIk, -NH-CO-Ph, -NH-CO-Alk, -NH-SO-alk, -CO-NRRor -CO-NHOH； or R and R form together, with the carbon atomsof the phenyl ring to which they are bound a 6-membered carbon-containing ring,comprising a nitrogen atom and another heteroatom such as oxygen； in base or saltform, as well as in hydrate or solvate form. The invention also concerns a methodfor preparing said compounds, pharmaceutical composition containing sameand the therapeutic uses thereof.
