Cinchonamine Squaramide Catalyzed Asymmetric aza-Michael Reaction: Dihydroisoquinolines and Tetrahydropyridines
作者:Tarun Kumar Roy、Biswajit Parhi、Prasanta Ghorai
DOI:10.1002/anie.201805020
日期:2018.7.20
The first example of a chiral cinchona‐squaramide catalyzed enantioselective intramolecular aza‐Michaeladdition for the synthesis of dihydroisoquinolines and tetrahydropyridines has been developed. In general, good yields and excellent enantioselctivities were observed. Broad classes of Michael acceptors, such as enones, esters, thioesters, and Weinreb amides, were successful substrates. The possibility