PROCESS FOR PRODUCING ESTERS OF 19-NORSTEROID ALCOHOL DERIVATIVES FORMED WITH ORGANIC ACIDS AND SALTS THEREOF, AS WELL AS PHARMACEUTICAL COMPOSITIONS COMPRISING SAME

Products of general formula (I): in which R1 denotes an aliphatic hydrocarbon radical, R2 and R3, which are identical or different, denote a hydrogen atom or an alkyl radical, G denotes a hydrocarbon group containing from one to eighteen carbon atoms and optionally one or a number of identical or different heteroatoms, which is linked to the steroid nucleus by a carbon atom, and either X denotes XA, XA being a hydrogen atom, an alkyl radical, an arylalkyl radical or an acyl radical, and in this case Y denotes YA, YA being a group -B-O-CO-A-Z in which B denotes a saturated or unsaturated, linear or branched, divalent aliphatic radical, A denotes either a saturated or unsaturated, linear or branched, divalent aliphatic radical optionally interrupted or terminated by a divalent aromatic radical, or A denotes a divalent aromatic radical and Z denotes one of the functional groups -COOH or -SO3H, it being possible for these functional groups to be optionally converted into salt form or X denotes XB, XB being a group -CO-A-Z in which A and Z are as defined above and Y then denotes YB, YB being one of the groups chosen from -C IDENTICAL C-R4, -CH=CH-R4 or -CH2-CH2-R4, in which R4 denotes a hydrogen atom, a halogen atom, a trialkylsilyl radical, an alkyl radical or a phenyl radical, the said alkyl and phenyl radicals being optionally substituted.