Abstract
We reported the synthesis of (S)-pregabalin in a five-step sequence with 20% overall yield. As a modification of the previously developed route, a Michael addition between CH3NO2 and chiral oxaoxazolidinone was employed as a key operation for introducing the methyleneamino group, which allowed avoiding the use of toxic cyanide reagent and led to enantiomerically pure product (>99% ee) after the recrystallization in appropriate solvent.
Graphical Abstract
Disclosure statement
No potential conflict of interest was reported by the author(s).