Stereodivergent Construction of Adjacent Tetrasubstituted Stereocenters Enabled by CPA-Catalyzed Enantioselective Desymmetric Friedel-Crafts Reaction of α-Aryl-α-fluoro-1,3-indanediones.
Here we report the asymmetric Friedel-Crafts reaction between compounds α-aryl-α-fluoro-1,3-indanediones and indoles, catalyzed by an efficient chiral phosphoric acid catalyst. Using this methodology, a series of cyclic β-fluoroalcohols bearing two adjacent chiral centers were synthesized in up to 95% yield, with excel...