The unprecedented cooperative systems involving a diarylprolinol silyl ether with various Lewis acids have been found to effect the highly enantioselective intermolecular ¦Á-alkylation of aldehydes. A wide variety of aldehydes and alcohols can be transformed into the desired highly functionalized aldehydes in high yields, excellent enantioselectivities, and good diastereoselectivities at room temperature under mild conditions.
https://pubs.acs.org/doi/abs/10.1021/ol3002859

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