The development of highly enantioselective catalysts involving Cu(OTf)2 and chiral camphorsulfonamides for the alkynylation of ketone is described. The influences of Lewis acids, reaction conditions and chiral ligands on the outcome of the reaction are discussed. The best enantioselectivity (up to 97 % ee) was obtained in the alkynylation of 2′-chloroacetophenone. The scope of the reaction is also
描述了涉及Cu(OTf)2和手性
樟脑磺酰胺的高度对映选择性催化剂的开发,用于酮的烷基化。讨论了
路易斯酸,反应条件和手性
配体对反应结果的影响。在2'-
氯苯乙酮的炔基化反应中获得了最佳的对映选择性(至多97%ee)。还检查了反应范围。