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Beilstein J. Org. Chem. 2020, 16, 2100–2107, doi:10.3762/bjoc.16.177
Graphical Abstract
Figure 1: Structures of compounds 1–4.
Figure 2: Key HMBC (green arrows) and COSY (bold) correlations in 1 and 2.
Scheme 1: (A) Synthesis of MTPA diesters 1a and 1b. (B) Δδ Values for the (S)- and (R)-MTPA esters of 1.
Figure 3: Simplified model structures for calculations of the ECD spectra of 1.
Figure 4: Comparison of the experimental ECD spectra (black solid line) of 1 (A) and 2 (B) with the Boltzmann...