The asymmetric γ-additions of 1-alkynyl ketimines under dual-copper-catalysis have been developed, affording chiral tetrasubstituted α-amino allenoates with a vicinal all-carbon quaternary stereocenter in high yields (up to 99 % yield) with excellent stereoselectivities (up to 99 % ee, up to >20 : 1 dr). Mechanistic experiments and DFT calculations demonstrated that the asymmetric γ-addition reactions
开发了双
铜催化下 1-炔基酮
亚胺的不对称 γ-加成反应,以高产率(高达 99% 的产率)提供具有邻位全碳季立体中心的手性四取代 α-
氨基联烯酸酯,并具有优异的立体选择性(高达至 99% ee,高达 >20: 1 dr)。机理实验和DFT计算表明,双手性Cu催化剂能够催化不对称γ加成反应。