Enantioselective aza-Henry reactions of cyclic α-carbonyl ketimines under bifunctional catalysis
作者:Alejandro Parra、Ricardo Alfaro、Leyre Marzo、Alberto Moreno-Carrasco、José Luis García Ruano、José Alemán
DOI:10.1039/c2cc34053d
日期:——
The aza-Henry reaction of nitroalkanes with the CN group of 2-aryl-3H-indol-3-ones catalyzed by thiourea-chincona derivatives takes place with good yield and high ee's.
Asymmetric Brønsted Acid-Catalyzed Friedel-Crafts Reactions of Indoles with Cyclic Imines - Efficient Generation of Nitrogen-Substituted Quaternary Carbon Centers
作者:Magnus Rueping、Sadiya Raja、Alberto Núñez
DOI:10.1002/adsc.201000952
日期:2011.3.7
A new enantioselective Brønsted acid‐catalyzed Friedel–Crafts reaction of indole with cyclicimines has been develeoped. This organocatalytic reaction provides for the first time optically active indolindolinone derivatives in high yields and with excellent enantioselectivities (up to 91% ee) under mild reaction conditions.