2,2-DIMETHYL-4-PHENYLOXAZOLIDINE AND 2,2-DIMETHYL-4,5-DIPHENYLIMIDAZOLIDINE AS NEW CHIRAL AUXILIARIES - APPLICATIONS TO ASYMMETRIC NITRILE OXIDE CYCLOADDITIONS
Asymmetric dipolar cycloadditions of a nitrile oxide to the acrylamide derivatives of two new chiral auxiliaries, (R)-2,2-dimethyl-4-phenyloxazolidines and (S,S)-2,2-dimethyl-4,5-diphenylimidazolidine, show satisfactorily high diastereoselectivities (up to 91%).