Allylgermanes were obtained by the reaction of allyl acetates with bis(triethylgermyl)cuprate(I) reagent in high yields. It was found that the present reaction proceeded with high regioselectivity, in which a triethylgermyl group was exclusively introduced to the less substituted side of an allylic system regardless of the original location of acetoxyl group. In the case of the allyl acetates possessing two secondary centers at the both ends of the allylic system, the formal SN2 product was preferentially produced (SN2 : SN2′ = ca. 9 : 1). The desulfurizative germylation of allyl phenyl sulfides utilizing bis(triethylgermyl)cuprate(I) reagent also proceeded to give allylgermanes in good yields with the same regioselectivity.
通过将烯丙基
醋酸酯与双(三乙基
锗基)
铜(I)试剂反应,可以获得高产率的烯丙基
锗化合物。研究发现,该反应具有高区域选择性,即三乙基
锗基团独占性地引入到烯丙基体系的较少取代侧,而不受醋氧基团原始位置的影响。在烯丙基体系两端都拥有两个二级中心的烯丙基
醋酸酯的情况下,形式上优先生成SN2产物(SN2 : SN2′ ≈ 9 : 1)。利用双(三乙基
锗基)
铜(I)试剂对烯丙基苯基
硫化物进行去
硫化锗化反应,也能以良好的产率生成烯丙基
锗化合物,并且保持相同的区域选择性。