NOVEL PROCESS FOR PREPARING NITRONES AND N-HYDROXYLAMINES COMPRISING AT LEAST ONE HYDROXYL GROUP, AND PRODUCTS THUS OBTAINED

摘要

The present invention relates to the use of a Lewis acid, in particular chosen from: - boron trihalides (BI₃, BBr₃, BCl₃, BF₃), - complexes of the abovementioned boron trihalides with Lewis bases such as ethers, thioethers, phosphines or amines, or - trialkylsilane halides (TMSI, TMSBr), for converting one or more alkoxyl groups to one or more hydroxyl groups, wherein said alkoxyl groups are present on cyclic or noncyclic compounds bearing a nitrone or N-hydroxylamine nitrogenous functional group, it being possible for said nitrogenous functional group to be integrated into a ring, without affecting the nitrogenous functional group.