Organocatalytic asymmetric 5-hydroxyisoxazolidine synthesis: A highly enantioselective route to β-amino acids

Abstract

The highly chemo- and enantioselective organocatalytic tandem reaction between N-protected hydroxyl amines and α,β-unsaturated aldehydes is presented; the reaction provides access to 5-hydroxyisoxazolidines and β-amino acids in high yields and with 90–99% ee.