Enantioselective Annulations for Dihydroquinolones by in Situ Generation of Azolium Enolates
摘要:
A convergent, catalytic asymmetric formal [4 + 2] annulation for the synthesis of dihydroquinolones has been developed. Carboxylic acids can be employed as precursors to NHC enolates through an in situ activation strategy. Simultaneous generation of a reactive aza-o-quinone methide under the basic conditions employed for NHC generation leads to a dual activation approach.
Ionic diamine rhodium complex catalyzed hydroaminomethylation of 2-allylanilines
作者:Kazumi Okuro、Howard Alper
DOI:10.1016/j.tetlet.2010.07.048
日期:2010.9
Ionic diamine rhodium complexes catalyze the hydroaminomethylation of 2-allylanilines. The reaction involves initial hydroformylation followed by reductive amination, which provides direct access to 1,2,3,4-tetrahydroquinolines and 2,3,4,5-1H-1-benzazepines. (C) 2010 Elsevier Ltd. All rights reserved.