stereoselective 1,4-diboration of conjugated dienes with B2(pin)2 was accomplished with Ni(cod)2 and PCy3 as the catalyst. This reaction broadens the substrate scope of current methods for catalytic diene diboration by including internal and sterically hindered dienes, and it proceeds efficiently at low catalyst loadings. The intermediate allylboronate was oxidized to the stereodefined allylic 1,4-diol.
以Ni(cod) 2和PCy 3为催化剂,完成了共轭二烯与B 2 (pin) 2的催化立体选择性1,4-二
硼化反应。该反应通过包含内二烯和位阻二烯,拓宽了当前催化二烯二
硼化方法的底物范围,并且该反应在低催化剂负载量下有效进行。中间体烯丙基
硼酸酯被氧化成立体定义的烯丙基 1,4
-二醇。