3‐Mono‐Substituted BINOL Phosphoric Acids as Effective Organocatalysts in Direct Enantioselective Friedel–Crafts‐Type Alkylation of N‐Unprotected α‐Ketiminoester
most widely used chiral Brønsted acid organocatalysts, their structures are mostly limited to 3,3′‐disubstituted ones and simple 3‐mono‐substituted ones without any polar functionalities on the 3‐substituent have not been used in highly enantioselective reactions. This work reports such 3‐mono‐substituted analogues as effective organocatalysts in direct highly enantioselectiveFriedel–Crafts‐type alkylation