Enantioselective annulations for dihydroquinolones by in situ generation of azolium enolates.

ABSTRACT: 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.

SUBMITTER: Lee A 

PROVIDER: S-EPMC4120988 | biostudies-literature | 2014 Jul

REPOSITORIES: biostudies-literature