Asymmetric Homoenolate Additions to Acyl Phosphonates through Rational Design of a Tailored <i>N</i>-Heterocyclic Carbene Catalyst
作者:Ki Po Jang、Gerri E. Hutson、Ryne C. Johnston、Elizabeth O. McCusker、Paul H.-Y. Cheong、Karl A. Scheidt
DOI:10.1021/ja410932t
日期:2014.1.8
A highly selective NHC-catalyzed synthesis of gamma-butyrolactones from the fusion of enals and alpha-ketophosphonates has been developed. Computational modeling of competing transition states guided a rational design strategy to achieve enhanced levels of enantioselectivity with a new tailored C-1-symmetric biaryl-saturated imidazolium-derived NHC catalyst.