Aromatic compounds bearing at least one phosphonate or phosphinate group, preparation method and uses thereof

A process for the preparation of an aromatic compound, the process comprising reacting an aromatic compound with the formula (III):

• wherein:
• A represents the residue of a cycle forming all or a portion of a monocyclic or polycyclic, aromatic, carbocyclic and/or heterocyclic system;
• R, which may be identical or different, represents substituents on the cycle;
• and
• n represents the number of substituents on the cycle,
• with a reagent of formula (I) or (II) constituted of a diene backbone and bearing a phosphonate or phosphinate group on one of the double bonds, in the presence of a Lewis acid:
• wherein:
• R1 and R2, represent, independently, hydrogen, alkyl, alkenyl, aryl, alkaryl, aralkyl, cycloalkyl, heterocycloalkyl, or alkenyl groups,
• R3 represents an alkyl group or an electron-donating group, and
• R4, R5 and R6 represent independently hydrogen, alkyl, aralkyl, cycloalkyl or metals selected from the group consisting of alkali metal or alkaline earth metal, wherein the resulting aromatic compound bears a phosphonate or phosphinate group on the aromatic ring.