Organocatalytic Asymmetric Tandem Cyclization/Michael Addition via Oxazol-5(2<i>H</i>)‑One Formation: Access to Perfluoroalkyl-Containing <i>N</i>,<i>O</i>‑Acetal Derivatives

Herein, we report a convenient organocatalytic asymmetric tandem cyclization/Michael addition protocol for the synthesis of diastereomerically pure and highly enantioenriched perfluoroalkyl-containing N,O-acetal derivatives starting from racemic N-perfluoroacyl amino acids under mild conditions. This efficient atom economic reaction leads to highly enantioselective and diastereoselective construction of N,O-acetal derivatives containing oxazolone and perfluoroalkyl moieties containing vicinal quaternary and tertiary stereocenters (up to 97% yield, up to 96% ee, and up to >20:1 dr).