Patent ID: 7902392
Filing Date: 2011-03-08
Classification: C07F,C08G

Abstract:
1. A method for preparing organosilicon compounds (2) containing carboxy radicals, and comprising units of the formula where each A is identical or different and is a radical of the formula by oxidizing organosilicon compounds (1) comprising carbinol radicals and units of the formula where each A′ is identical or different and is a radical of the formula where Y Y y corresponds to the valency of radical Y R each is identical or different and is a monovalent, SiC-bonded optionally substituted hydrocarbon radical, X each is identical or different and is a chlorine atom, the group A′ or a radical of the formula OR a is 0, 1 or 2, b is 0, 1, 2 or 3, c is 0, 1, 2 or 3, and d is 0, 1, 2 or 3, in the presence of a mediator (3) comprising at least one nitroxyl radical of the formulae where R the phenyl radicals are unsubstituted or mono- or polysubstituted by a radical R R R the carbamoyl, sulfamoyl, amino, mercapto and phenyl radicals are unsubstituted or mono- or polysubstituted by a radical R and the aryl-C and two adjacent groups [—CR where R H—N—OH and at least one oxidizing agent (4), selected from the group consisting of air, oxygen, hydrogen peroxide, organic peroxides, perborates, persulfates, organic and inorganic peracids, salts and derivatives of the peracids, chlorine, bromine, iodine, hypohalic acids and salts thereof, halic acids and salts thereof, halogen acids and salts thereof, Fe(CN)