Fig. 3: Substrate scope for the synthesis of deuterated amino acids and their derivatives.

Standard reaction conditions: amine (0.2 mmol, 1 equiv.), carbonyl compound (1.2 equiv.), d2-HE1 (1.5 equiv.), Ca(NTf2)2 (5 mol%) in HFIP (0.2 M) at r.t. for 12 h. The yields are isolated yields. > 99% deuteration in all cases. bORTEP drawing of compound 16. Thermal ellipsoids are shown at 30% probability level.