Modular Monodentate Oxaphospholane Ligands: Utility in Highly Efficient and Enantioselective 1,4-Diboration of 1,3-Dienes
作者:Christopher H. Schuster、Bo Li、James P. Morken
DOI:10.1002/anie.201102404
日期:2011.8.16
Tune it up! Tunable, chiral, monodentate oxaphospholane ligands (termed OxaPhos) are highly effective in the Pt‐catalyzed title reaction, providing the 1,4‐addition products in enantiomer ratios approaching 99:1 (see scheme). In the presence of enantiomerically pure cis‐iBu‐OxaPhos, a catalyst loading of only 0.02 mol % [Pt(dba)3] was sufficient for effective reaction. pin=pinacolato, dba=dibenzylideneacetone
调整一下!可调节、手性、单齿氧磷杂环戊烷配体(称为 OxaPhos)在 Pt 催化的标题反应中非常有效,提供对映体比率接近 99:1 的 1,4 加成产物(参见方案)。在对映体纯的顺式 Bu-OxaPhos 存在下,仅 0.02 mol% [Pt(dba) 3 ]的催化剂负载量就足以进行有效反应。pin=频那可乐,dba=二亚苄基丙酮。