A Conformational Model for MTPA Esters of Chiral N-(2-Hydroxyalkyl)acrylamides

Figure 1

¹H NMR signals for diastereotopic protons H1′a and H1′b in the (R)-MTPA amido ester (S)-3b (Spectrum A) and (S)-MTPA amido ester (S)-4b (Spectrum B).

(a)

(b)