Chiral allyl vinyl boronates are generated by catalytic enantioselective diboration of prochiral allenes. They may then be reacted, in situ, with a hydroborating reagent to form a novel triboron intermediate. The least hindered and most reactive C-B bond then participates in cross-coupling wherein the coupling is brought about by the same catalyst as that which catalyzed the diboration reaction. The
手性烯丙基
乙烯基硼酸酯是通过前手性烯丙基的催化对映选择性二
硼化而生成的。然后可以使它们与
硼氢化试剂原位反应以形成新型三
硼中间体。然后受阻最少和反应性最强的CB键参与交叉偶联,其中偶联是通过与催化双
硼化反应的催化剂相同的催化剂进行的。然后在反应后处理中将剩余的CB键氧化,从而允许以简明的单罐方式模块化合成手性二醇。