Sodium Salts of Anionic Chiral Cobalt(III) Complexes as Catalysts of the Enantioselective Povarov Reaction
作者:Jie Yu、Hua-Jie Jiang、Ya Zhou、Shi-Wei Luo、Liu-Zhu Gong
DOI:10.1002/anie.201504790
日期:2015.9.14
The sodium salts of anionic chiral cobalt(III) complexes (CCC−Na+) have been found to be efficient catalysts of the asymmetric Povarov reaction of easily accessible dienophiles, such as 2,3‐dihydrofuran, ethyl vinyl ether, and an N‐protected 2,3‐dihydropyrrole, with 2‐azadienes. Ring‐fused tetrahydroquinolines with up to three contiguous stereogenic centers were thus obtained in high yields, excellent
阴离子手性钴的钠盐(III)配合物(CCC -钠+)已经被发现是容易接近亲双烯体的不对称波瓦罗夫反应的高效催化剂,如2,3-二氢呋喃,乙基乙烯基醚,和Ñ -受保护的2,3-二氢吡咯和2-氮杂二烯。从而以高收率,出色的非对映选择性(内/外最高> 20:1)和高对映选择性(最高95:5 er)获得了具有多达三个连续立体中心的环稠合四氢喹啉。