The reactivity of tetramesityldisilene with epoxides: dependence of product distributions on steric and structural characteristics of the epoxide
作者:John E. Mangette、Douglas R. Powell、Timothy K. Firman、Robert West
DOI:10.1016/0022-328x(95)06069-9
日期:1996.8
Mono- and 1,1-disubstituted epoxides react with tetramesityldisilene (1) to give disilyl enol ethers (5) five-membered rings (6) and the products of epoxide deoxygenation, alkenes and 1,1,2,2-tetramesityl-3-oxa-1,2-disilacyclopropane (4). Adducts 5 and 6 are formed with complete regioselectivity, suggesting involvement of an epoxide ring-opened intermediate, Product ratios vary systematically with a dependence on the steric properties of the epoxide. Single crystal X-ray diffraction results are given for 6a and 6g, the five-membered ring products derived from propylene and cyclohexene oxides.