Organocatalytic Domino Reaction of Cyanosulfones: Access to Complex Cyclohexane Systems with Quaternary Carbon Centers
作者:Sundaram Rajkumar、Kenneth Shankland、Jonathan M. Goodman、Alexander J. A. Cobb
DOI:10.1021/ol400356k
日期:2013.3.15
of a bifunctionalthiourea catalyst, a highlystereoselective domino reaction occurs to generate complex cyclohexanes with up to four stereogenic centers, one of which is quaternary in nature. Therefore, it is demonstrated that, like nitro compounds, sulfones can undergo an asymmetric intramolecular conjugate addition to α,β-unsaturated esters in the presence of a bifunctionalorganocatalyst.