Organocatalytic Cascade Knoevenagel–Michael Addition Reactions: Direct Synthesis of Polysubstituted 2-Amino-4H-Chromene Derivatives
作者:Sanjay N. Jadhav、Seema P. Patil、Dipti Prava Sahoo、Dharitri Rath、Kulamani Parida、Chandrashekhar V. Rode
DOI:10.1007/s10562-019-03089-8
日期:2020.8
isotherms measurements, and they were successfully examined for the cascade type Knoevenagel–Michael addition reactions. The product yields associated with these substrates were optimized, and key reaction parameters affecting the yields were identified. The present catalytic method is simple and robust for diversity oriented synthesis which proceeds good to excellent yields without generating any hazards
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.