A Practical Approach for Enantio- and Diastereocontrol in the Synthesis of 2,3-Disubstituted Succinic Acid Esters: Synthesis of the pan-Notch Inhibitor BMS-906024

An oxidative intermolecular enolate heterocoupling reaction was employed for the synthesis of anti -2,3-disubstituted succinic acid mono- and differentially protected diesters. Tactical approaches to access all the diastereomers are discussed. The method was applied to the synthesis of a potent anticancer agent, BMS-906024.