Pseudoephedrine-Directed Asymmetric α-Arylation of α-Amino Acid Derivatives
作者:Rachel C. Atkinson、Fernando Fernández-Nieto、Josep Mas Roselló、Jonathan Clayden
DOI:10.1002/anie.201502569
日期:2015.7.27
Available α‐amino acids undergo arylation at their α position in an enantioselective manner on treatment with base of N′‐aryl urea derivatives ligated to pseudoephedrine as a chiral auxiliary. In situ silylation and enolization induces diastereoselective migration of the N′‐aryl group to the α position of the amino acid, followed by ring closure to a hydantoin with concomitant explulsion of the recyclable