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Rawal's catalyst as an effective stimulant for the highly asymmetric Michael addition of β-keto esters to functionally rich nitro-olefins†
A. Suresh Kumar,T. Prabhakar Reddy,R. Madhavachary,Dhevalapally B. Ramachary
Organic & Biomolecular Chemistry Pub Date : 11/13/2015 00:00:00 , DOI:10.1039/C5OB02178B
Abstract

A general approach to asymmetric synthesis of highly substituted dihydroquinolines was achieved through neighboring ortho-amino group engaged sequential Michael/amination/dehydration reactions on (E)-2-(2-nitrovinyl)anilines with cyclic and acyclic β-keto esters in the presence of a catalytic amount of Rawal's quinidine-NH-benzyl squaramide followed by TFA.

Graphical abstract: Rawal's catalyst as an effective stimulant for the highly asymmetric Michael addition of β-keto esters to functionally rich nitro-olefins
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