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Rawal's catalyst as an effective stimulant for the highly asymmetric Michael addition of β-keto esters to
A Suresh Kumar1, T Prabhakar Reddy1, R Madhavachary1
1School of Chemistry, University of Hyderabad, Hyderabad 500 046, India. ramsc@uohyd.ernet.in.
Organic & Biomolecular Chemistry
|November 28, 2015
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.