Phosphonium Chloride Induced Dichlorosilylene Transfer from Trichlorosilane
Organometallics2003Vol. 22(13), pp. 2551–2553
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Abstract
Heating trichlorosilane with conjugated dienes or an acetylene solution at 150 or 180 °C in the presence of a catalytic quantity of tetrabutylphosphonium chloride resulted in elimination of HCl and dichlorosilylene transfer to the unsaturated substrates to afford silacyclopentenes or 1,4-disilacyclohexa-2,5-dienes, respectively, in good to excellent yields. The trapping reaction with hex-3-yne gave 1,1,4,4-tetrachloro-2,3,5,6-tetraethyl-1,4-disilacyclohexa-2,5-diene in 79% yield, and its structure was determined by X-ray crystallography.
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