(Organothiomethyl)chlorosilanes and their preparation methods

Details (Organothiomethyl)chlorosilanes and their preparation methods (Organothiomethyl)chlorosilanes and their preparation methods

2006-09-19

2006-09-19

Barts, Samuel (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

Reexamination Certificate

active

07109367

ABSTRACT:
This invention relates to (organothiomethyl)chlorosilanes and methods for their preparation by the dehydrohalogenative Si—C coupling reaction of oranothiomethyl halides with Si—H containing chlorosilanes (hydrosilanes), wherein a mixture of oranothiomethyl halide and hydrosilane is heated in the presence of tertiary amine or organic salts (quaternary organoammonium and organophosphonium halides to give (organothiomethyl)chlorosilanes, which is existing a sulfur atom in alkyl chain, (formula: R2SCH2SiCl2R1) in good yield. wherein R1represents a hydrogen atom, halogen, or C1–C6alkyl; R2is selected from the group consisting of C1–C6alkyl or an aryl group. Especially, this reaction using organic salt as a catalyst provide better economical matter and yield compared with conventional methods, because only catalytic amount of organic salt is required and the catalyst can be separated from the reaction mixture and recycled easily.

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Sorokin et al.,Russian Journal of General Chemistry, 71(12):1883-90 (2001).
Voronkov et al.,Zhurnal Obshchei Khimii, 45(8):1807-11 (1975).
Sharipov,Russian Journal of Applied Chemistry, 76:108-113 (2003).

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