作者:Reiko Wada、Kounosuke Oisaki、Motomu Kanai、Masakatsu Shibasaki
DOI:10.1021/ja047200l
日期:2004.7.1
The first example of catalytic enantioselective allylboration and crotylboration of simple ketones is described. High enantioselectivity (up to 93% ee) was obtained using 3 mol % CuF-iPr-DuPHOS as a chiral catalyst and 4.5 mol % La(OiPr)3 as a cocatalyst. Mechanistic studies strongly suggested that the active nucleophile of the present reaction is an allylcopper, and that La(OiPr)3 facilitates the
描述了简单酮的催化对映选择性烯丙基硼化和巴豆基硼化的第一个例子。使用 3 mol% CuF-iPr-DuPHOS 作为手性催化剂和 4.5 mol% La(OiPr)3 作为助催化剂获得了高对映选择性(高达 93% ee)。机理研究强烈表明,本反应的活性亲核试剂是烯丙基铜,并且 La(OiPr)3 有助于从烯丙基硼酸酯生成活性烯丙基铜,而不影响酮烯丙基化步骤的过渡态结构。