参考标题:Catalytic Enantioselective Synthesis Of Lactams Through Formal [4+2] Cycloaddition Of Imines With Homophthalic Anhydride 作者:Claire L. Jarvis,Jennifer S. Hirschi,Mathew J. Vetticatt,Daniel Seidel |发布日期:2017.3.1 摘要:An Amide‐thiourea Compound, Operating Through A Novel Ion Pairing Mechanism, Is An Efficient Organocatalyst For The Asymmetric Reaction Of Homophthalic Anhydride With Imines. N‐aryl And N‐alkyl Imines Readily Undergo Formal [4+2] Cycloaddition To Provide Lactams With High Levels Of Enantio‐ And Diastereoselectivity. The Nature Of The Key Chiral Ion Pair Intermediate Was Elucidated By Dft Calculations