l-Proline-derived tertiary amino alcohol as a new chiral ligand for enantioselective alkynylation of aldehydes

The easily prepared chiral tertiary amino alcohol 1a was found to catalyze the reaction of alkynylzinc reagents with various aldehydes to generate chiral propargylic alcohols with moderate-to-good enantioselectivities. The mechanism of the reaction is also discussed in this Letter. A novel theoretical computation of those evaluated ligands was introduced which may supply valuable experience to help designing new chiral ligands.

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