The treatment of 4-benzyloxy-1-butyne with PhMe2SiMgMe in the presence of a catalytic amount of MnCl2 gave a monosilylated product, (E)-PhCH2OCH2CH2CH=CHSiMe2Ph, selectively after an aqueous workup. Meanwhile, the reaction of isoprene with PhMe2SiMgMe under manganese catalysis and the subsequent addition of iodomethane afforded 4-dimethylphenylsilyl-2,3-dimethyl-1-butene in good yield.
在催化剂 MnCl2 的存在下,用 PhMe2SiMgMe 处理 4-苄氧基-
1-丁炔,经过
水性反应后,可选择性地得到单
硅烷化产物 (E)-PhCH2OCH2CH2CH=CHSiMe2Ph。同时,
异戊二烯在
锰催化下与 PhMe2SiMgMe 反应,随后加入
碘甲烷,可以得到 4-二甲基苯基
硅基-
2,3-二甲基-1-丁烯,收率很高。