Fig. 7: NMR characterization of the ion pair between catalyst 3e and nitronate 1b. | Nature Catalysis

Fig. 7: NMR characterization of the ion pair between catalyst 3e and nitronate 1b.

From: Harnessing the ambiphilicity of silyl nitronates in a catalytic asymmetric approach to aliphatic β3-amino acids

Fig. 7: NMR characterization of the ion pair between catalyst 3e and nitronate 1b.

a, Sequence of catalyst silylation and nitronate addition leading to ion pair 3e-TBS-1b. b, 31P NMR traces corresponding to the respective steps in a (all measurements conducted at 193 K; see Supplementary Figs. 4 and 5 for further details). c, DFT structure of ion pair 3e-TBS-1b. Red, oxygen; blue, nitrogen; black, carbon; white, hydrogen; orange, phosphorous; green, fluorine; yellow, sulfur.

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