Supporting Information. Some of the catalyst identifiers
(A–G) used in the Supporting Information
did not match those shown in the Communication. We have updated the Supporting Information to eliminate this discrepancy.Prof. D. E. Ward (University of Saskatchewan) alerted us to several
relevant publications involving enantioconvergent proline-catalyzed
aldol reactions of chiral racemic electrophiles. We thank Prof. Ward
for bringing these examples to our attention. Reference 4 should begin,
“For the dynamic reduction of α-keto esters and subsequent
diastereoselective lactonization see: (a) Steward, K. M.; Gentry,
E. C.; Johnson, J. S. J. Am. Chem. Soc.2012, 134, 7329–7332.” The references
shown as ref (1) below
should then follow as refs 4b–e.