Enantioselective Synthesis of Multisubstituted Allenes by Cooperative Cu/Pd‐Catalyzed 1,4‐Arylboration of 1,3‐Enynes
作者:Yang Liao、Xuemei Yin、Xihong Wang、Wangzhi Yu、Dongmei Fang、Lianrui Hu、Min Wang、Jian Liao
DOI:10.1002/anie.201912703
日期:2020.1.13
Cu/Pd-catalyzed enantioselective synthesis of multisubstituted allenes is established. By employing chiral sulfoxide phosphine (SOP)/Cu and PdCl2 (dppf) complexes as catalysts, the 1,4-arylboration of 1,3-enynes provides an efficient approach to trisubstituted chiral allenes with up to 92 % yield and 97:3 er. Furthermore, by using 2-substituted 1,3-enynes as substrates, the tetrasubstituted chiral allenes were
建立了铜/钯催化的多取代烯的对映选择性合成。通过使用手性亚砜膦(SOP)/ Cu和PdCl2(dppf)配合物作为催化剂,1,3-烯炔的1,4-芳基硼化提供了一种高效的三取代手性异戊烯的方法,收率高达92%和97:3 er 。此外,通过使用2-取代的1,3-烯炔作为底物,使用该策略成功地产生了四取代的手性烯丙基。最后,理论计算表明,烯丙基铜物种的金属转移是该转变的限速步骤。