反应详情

The optical purity of the (S)-5-(hydroxymethyl)-1-(phenylmethyl)-2-pyrrolidinone was established by formation of the ester derived from (S)-(-)-α-methoxy-α-(trifluoromethyl)phenylacetic acid ((-)-MTPA) following the procedure of Mosher, et al. (J. Org. Chem. 1969, 34, 2543). A single diastereomeric ester, as judged by 1H NMR and TLC, was obtained, and could readily be differentiated from the diastereomeric mixture (by the doubling of the CH2N and CH2O signals in the 1H NMR) produced when racemic 5-(hydroxymethyl)-1-(phenylmethyl)-2-pyrrolidinone was used to form the (-)-MTPA ester.

1. customwas obtained