Patent ID: 7713965

Claim:
A compound of formula (I): in which either R 1 represents: H, OH, NH 2 , —(CH 2 ) m —NR a R b in which m =0.1 or 2, R a and R b are identical or different and represent H, linear, branched or cyclic (C 1 -C 6 ) alkyl, (C 3 -C 6 ) cycloalkyl-(C 1 -C 6 )-alkyl; or also represent R c ,S(O) 2 R c , C(O)R c ,S(O) 2 R d or C(O)R d ; or R a and R b form together with the nitrogen atom, an R c radical; R c represents a saturated, unsaturated or aromatic 5- to 6-member ring containing 1 to 4 heteroatoms chosen from N, O and S, optionally substituted by 1 to 3 (C 1 -C 6 ) alkyl radicals, said ring being linked, if appropriate, to the nitrogen atom of NR a R b by a nitrogen atom or a carbon atom; R d represents a linear or branched (C 1 -C 6 ) alkyl or (C 3 -C 6 ) cyclic alkyl radical, optionally substituted by 1 to 4 halogens; or R 1 represents R c or CHR e R c or CHR e R d ; R c and R d are as defined above, R e represents H, OH, NH 2 , NH—(C 1 -C 6 )-alk or N—(C 1 -C 6 )- alk 2 , or NH—(C 1 -C 7 )-acyl or NHR c , R c being as defined above; R 2 represents: H, (CH 2 ) m —NR a R b , R c , CHR e R c or CHR e R d , R a , R b , R c , R d and R e are as defined above; and R′ 2 represents H; it being understood that R 1 and R 2 cannot at the same time be H or that R 1 and R 2 or R 2 and R 1 cannot be one (CH 2 ) m —NR a R b or R c or H and the other one OH, or one H and the other one NH 2 , or one H and the other one (CH 2 ) m —NR a R b in which R a and R b represent H or (C 1 -C 6 ) alkyl or C(O)R d , in which R d represents an unsubstituted linear or branched (C 1 -C 6 ) alkyl or (C 3 -C 6 ) cyclic alkyl radical; or R 1 has the above definition except H and R 1 and R′ 2 together represent gem (C 1 -C 6 ) dialkyl or (C 1 -C 6 ) alkyl-oxime, or R 2 and R′ 2 represent respectively R c or R d and OH, NH 2 , NHR c or NHR f , R c and R d being as defined above and R f being a (C 1 -C 7 ) acyl radical; or R 1 represents H and R 2 and R′ 2 together represent (C 1 -C 6 ) alkyl-oxime or one represents R c and the other one represents OH, NH 2 , NHR c or NHR f , R c and R f being defined as above; n is 0 or 1; R 3 and R′ 3 , identical or different, represent H or (C 3 -C 6 ) alkyl optionally substituted by 1 to 3 halogens or R 3 represents a (C 1 -C 6 ) alkoxy carbonyl group and R′ 3 represents H; R 4 represents methyl optionally substituted by one to three halogens; R 5 represents H, (C 3 -C 6 ) alkyl or (C 7 -C 12 ) arylalkyl; R 6 represents H, fluorine, NO 2 , CF 3 or CN; in the form of mixtures of enantiomers or single enantiomers, as well as their addition salts with mineral and organic acids and their salts with mineral or organic bases.