Evans, David A.; Murry, Jerry A.; Matt, Peter von, Angewandte Chemie, 1995, vol. 107, # 7, p. 864 - 867
作者:Evans, David A.、Murry, Jerry A.、Matt, Peter von、Norcross, Roger D.、Miller, Scott J.
DOI:——
日期:——
Chiral Bis(oxazoline)copper(II) Complexes as Lewis Acid Catalysts for the Enantioselective Diels−Alder Reaction
作者:David A. Evans、Scott J. Miller、Thomas Lectka、Peter von Matt
DOI:10.1021/ja991190k
日期:1999.8.1
Bis(oxazoline)copper(II) complexes are highlyenantioselective catalysts in Diels−Alder reactions involving bidentate dienophiles. Cationic [Cu((S,S)-t-Bu-box)]X2 complexes with different counterions have been used as catalysts, revealing a profound influence of the counterion on the rate and stereoselectivity of the catalyst. A square-planar catalyst−substrate complex is proposed to account for the