作者:Joshua D. Sieber、James P. Morken
DOI:10.1021/ja710922h
日期:2008.4.1
The nickel-catalyzed enantioselective addition of allylboronic acid pinacol ester, allylB(pin), is described. This reaction is highly effective with dialkylidene ketones and favors the allylation of the benzylidene site in nonsymmetric substrates. The reaction appears to proceed by conversion of the dialkylidene ketone substrate to an unsaturated pi-allyl complex (I), followed by reductive elimination
描述了镍催化的烯丙基硼酸频哪醇酯烯丙基 B(pin) 的对映选择性加成。该反应对二亚烷基酮非常有效,并有利于非对称底物中亚苄基位点的烯丙基化。该反应似乎是通过将二亚烷基酮底物转化为不饱和的 pi-烯丙基络合物 (I),然后进行还原消除来进行的。当使用手性配体 14 时,一系列底物的对映选择性范围为 91% 至 94% ee。