Chiral Tridentate P,N,N Ligands for Highly Enantioselective Copper-Catalyzed Propargylic Amination with both Primary and Secondary Amines as Nucleophiles
作者:Cheng Zhang、Ya-Hui Wang、Xin-Hu Hu、Zhuo Zheng、Jie Xu、Xiang-Ping Hu
DOI:10.1002/adsc.201200589
日期:2012.10.8
enantioselective propargylic amination of propargylic acetates with both primary and secondary amines as nucleophiles, affording the corresponding propargylic amines in high yields and with excellent enantioselectivities (up to 97% ee for secondary amines, and up to 96% ee for primary amines). Furthermore, the present catalytic system was also effective for the more challenging aliphatic propargylic acetate
已证明手性三齿P,N,N配体对于铜催化的乙酸丙酯与伯胺和仲胺均作为亲核试剂的对映选择性丙胺胺化非常有效,从而以高收率提供了相应的炔丙基胺,并具有出色的对映选择性(最高可达仲胺为97%ee,伯胺为96%ee)。此外,本催化体系对于更具挑战性的脂族乙酸炔丙酯底物也是有效的。