Copper-Catalyzed γ-Selective and Stereospecific Substitution Reaction of Allylic Carbonates with Diboron: Efficient Route to Chiral Allylboron Compounds
作者:Hajime Ito、Chika Kawakami、Masaya Sawamura
DOI:10.1021/ja056099x
日期:2005.11.23
copper-catalyzed gamma-selective and stereospecific substitution reaction of allylic carbonates with a diboron reagent affording allylboron compounds is described. Boryl group was selectively introduced at the gamma-position of the leaving carbonate group. Functionalized allylboronates that have an acetal, ester, or isolated alkene were prepared. The reaction of optically active allylic carbonates underwent complete
描述了铜催化的 γ 选择性和立体定向取代反应烯丙基碳酸酯与二硼试剂提供烯丙基硼化合物。在离去碳酸酯基团的 γ 位选择性地引入硼基。制备了具有缩醛、酯或分离的烯烃的官能化烯丙基硼酸酯。旋光烯丙基碳酸酯的反应通过反立体化学进行完全的 α 到 γ 手性转移,以产生具有硼取代立体中心的旋光烯丙基硼酸酯。