Patent ID: 6392077
Filing Date: 2002-05-21
Classification: C07F

Abstract:
A process for preparing organosilicon compounds represented by formula I, comprising a dehydrohalogenative coupling reaction of hydrochlorosilane represented by formula II with organic halides represented by formula III in the presence of quaternary phosphonium salt as a catalyst,R4R3CHSiR1Cl2(I)HSiR1Cl2(II)R2R3CHX(III)wherein R1 represents hydrogen, chloro, or methyl;X represents chloro or bromo; R2 is selected from the group consisting of C1-17 alkyl, C1-10 fluorinated alkyl with partial or full fluorination, C2-5 alkenyl, silyl containing alkyl group represented by (CH2)nSiMe3-mClm wherein n is an integer of 0 to 2 and m is an integer of 0 to 3, aromatic group represented by Ar(Râ€²)q wherein Ar is C6-14 aromatic hydrocarbon, Râ€² is C1-14 alkyl, halogen, alkoxy, or vinyl, and q is an integer of 0 to 5, haloalkyl group represented by (CH2)pX wherein p is an integer of 1 to 9 and X is chloro or bromo, and aromatic hydrocarbon represented by ArCH2X wherein Ar is C6-14 aromatic hydrocarbons and X is a chloro or bromo; R3 is hydrogen, C1-6 alkyl, aromatic group represented by Ar(Râ€²)q wherein Ar is C6-14 aromatic hydrocarbon, Râ€² is C1-4 alkyl, halogen, alkoxy, or vinyl, and q is an integer of 0 to 5; and R4 in formula I is the same as R2 in formula III and further, R4 can also be (CH2)pSiR1Cl2 or ArCH2SiR1Cl2, when R2 in formula III is (CH2)pX or ArCH2X, which is formed from the coupling reaction of X-(CH2)p+1-X or XCH2ArCH2X with the compounds of formula II; or when R2 and R3 are covalently bonded to each other to form a cyclic compounds of cyclopentyl or cyclohexyl group, R3 and R4 are also covalently bonded to each other in the same fashion.