Cyclopropylmethylsilanes and α-keto aldehydes underwent novel [3+2] cycloaddition reaction to afford 2-silylmethyl substituted tetrahydrofurans in good yields. Relative stereochemistries of the products were dependent on the reaction temperatures, trans- and cis-tetrahydrofurans were obtained stereoselectively at 0 °C and at −78 °C, respectively.
环丙基甲基硅烷和 α-酮醛发生了新颖的 [3+2] 环加成反应,以良好的收率获得了 2-
硅甲基取代的
四氢呋喃。产物的相对立体
化学性质取决于反应温度,反式和顺式
四氢呋喃分别在 0 °C 和 -78 °C 下立体选择性地获得。