Abstract: The invention concerns novel flavone and isoflavone derivatives of formulae (Ia) and (Ib) wherein: X represents a group of formula —COOR, or —PO(OR)2; R represents a hydrogen atom or an alkaline or alkaline-earth metal, or a lower alkyl group; R1 represents a hydroxy group, a lower alkoxy group or an acyloxy group; R2 and R3, identical or different, represent a hydrogen or halogen atom, or a trifluoromethyl group, a trichloromethyl group, a hydroxy group, an alkoxy group or an acyloxy group comprising 1 to 5 carbon atoms, or R2 and R3 can combine to form an alkylene dioxy group. The invention is useful for rheumatic diseases.

Abstract: The invention concerns novel flavone and isoflavone derivatives of formulae (Ia) and (Ib) wherein: X represents a group of formula —COOR, or —PO(OR)2; R represents a hydrogen atom or an alkaline or alkaline-earth metal, or a lower alkyl group; R1 represents a hydroxy group, a lower alkoxy group or an acyloxy group; R2 and R3, identical or different, represent a hydrogen or halogen atom, or a trifluoromethyl group, a trichloromethyl group, a hydroxy group, an alkoxy group or an acyloxy group comprising 1 to 5 carbon atoms, or R2 and R3 can combine to form an alkylene dioxy group. The invention is useful for rheumatic diseases.

Abstract: Glycosyl-spacer-drugs compounds (prodrugs), their preparation and their use as pharmaceuticals are described.

Abstract: Glycosyl-spacer-drugs compounds (prodrugs), their preparation and their use as pharmaceuticals are described.

Abstract: Substrate-spacer-prodrug compounds (pro-prodrugs) suited for site specific delivery of drugs, a process of preparing them and their use are described.

Abstract: Enzymatically clearable prodrugs with reduced Michaelis-Menten constant (Km) are described.

Abstract: Glycosylated prodrugs, a preparation method therefor, and their use with tumor-specific immunoenzymatic conjugates for the treatment of cancer, are described. These anthracycline prodrugs have formula (I).

Abstract: The present invention relates to new anthracyclines corresponding to the general formula I below: ##STR1## in which R' and R", which may be identical or different, denote a hydrogen atom (and in this case R' is different from R") or the group --(CH.sub.2).sub.n --R.sub.1 --(CH.sub.2).sub.m --R.sub.2 where n is between 1 and 6,m is between 0 and 4 (with the proviso, of course, that if m=0, R.sub.2 is nonexistent)R.sub.1 denotes one of the following groups: ##STR2## (in this case, m=0) ##STR3## (in this case m=0) where R.sub.3 and R.sub.4, which may be identical or different, denote a hydrogen atom or a substituted or unsubstituted alkyl group)--C.tbd.N (in this case m=0)--S----O--(with the proviso that m is other than 0) ##STR4## (m=0 and R.sub.3 R.sub.4 have the same meaning as above) and R.sub.2 denotes (in the case where m is other than 0) a hydrogen atom or alkyl or alkoxy groups or ##STR5## (R.sub.3 and R.sub.4 having the same meaning as above).

Abstract: The present invention relates to new aglycons which correspond to the general formula: ##STR1## in which: R.sub.1, R.sub.2, R.sub.3 and R.sub.5, which can be identical or different, represent a hydrogen atom or a group OH, OMetal or OR.sub.4, R.sub.4 being a substituted or unsubstituted C.sub.1 to C.sub.6 alkyl group,R represents a hydrogen atom or a group COCH.sub.2 R', R' being hydrogen or an alkyl, hydroxyl, alkoxy or aryl group,R.sub.6 and R.sub.7, which are always different, represent either a hydrogen atom or an OH group, andR.sub.8 represents a hydrogen atom or the group CH.sub.3 CO--.Application to the preparation of antibiotics and antitumoral agents.

Abstract: Process for hydroxylating alkylphenols in which the carbon atoms of the alkyl group bonded to the aromatic nucleus has at least one hydrogen atom bonded thereto and the phenolic ethers thereof, at the meta position relative to the phenol or ether function, by reacting the phenol compound with an aqueous hydrogen peroxide solution in the presence of a liquid superacid at low temperature.

Abstract: Process for the isomerization of ortho- and para-bromophenols or the ethers thereof into corresponding meta-brominated derivatives by isomerizing ortho- and para-bromophenols in the corresponding ethers in the presence of a liquid superacid at a temperature in the region of ambient temperature.