Compounds derived from 5-thioxylose and their use in therapeutics

A compound selected from the group consisting of:

• a) compounds corresponding to formula I
• wherein
• the pentapyranosyl group is a free or acylated 5-thio-β-D-xylopyranosyl group;
• R is a hydrogen atom or a C2-C6 acyl group;
• R1 is a C1-C4 alkylsulfonyl group, a C2-C6 acyl group, a group CONR′R″ or a group
• wherein
• X is a single bond, an oxygen atom, a sulfoxy group, a group —CO— or a group —CHOH—;
• Ra is a hydrogen atom, a halogen, a hydroxyl group, a C1-C4 alkyl group, a trifluoromethyl group, a trifluoromethoxy group, a cyano group, a C1-C4 hydroxyalkyl group, a C2-C4 acyl group, a C1-C4 alkoxy group or a group NR′R″;
• wherein R′ and R″ independently are each a hydrogen atom or a C1-C4 alkyl group optionally substituted by an aromatic ring, or together with the nitrogen atom to which they are attached form a ring having 5 or 6 carbon atoms;
• Rb and Rc independently of one another are each a hydrogen atom, a halogen atom, a C1-C4 alkyl group, a cyano group or a C1-C4 alkoxy group;
• and
• R2 is a hydrogen atom, a C1-C4 alkyl group or a halogen atom;
• b) acid addition salts of a);
• and
• c) active metabolites of b) and c).