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As shown in Figure 2, the ee values of isolated 3q′ (40% yield) and recovered 3q (55% yield) were both kept as 99% after epimerization, indicating that only the chiral center of C5 in 3q was epimerised in the presence of DBU. See Supporting Information for characterization details.
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As shown in Figure 2, the ee values of isolated 3q′ (40% yield) and recovered 3q (55% yield) were both kept as 99% after epimerization, indicating that only the chiral center of C5 in 3q was epimerised in the presence of DBU. See Supporting Information for characterization details.
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