Manganese‐Catalyzed Synthesis of cis‐β‐Amino Acid Esters through Organometallic CH Activation of Ketimines

Manganese-catalyzed CH functionalization reactions of ketimines set the stage for the expedient synthesis of cis-β-amino acid esters through site- and regioselective alkene annulations. The organometallic CH activation occurred efficiently with high functional group tolerance, delivering densely functionalized β-amino acid derivatives with ample scope.