Catalytic Asymmetric Conjugate Addition of Indolizines to α,β‐Unsaturated Ketones

Abstract A catalytic enantioselective conjugate addition of indolizines to enones is described. The chiral phosphoric acid ( S )‐TRIP activates α,β‐unsaturated ketones, thereby promoting an enantioface‐differentiating attack by indolizines. Using this reaction, several alkylated indolizines were synthesized in good yields and with enantiomeric ratios of up to 98:2.