Knöpfel Thomas F, Boyall Dean, Carreira Erick M
Laboratorium für Organische Chemie, ETH-Hönggerberg, CH-8093 Zurich, Switzerland.
Org Lett. 2004 Jun 24;6(13):2281-3. doi: 10.1021/ol0491585.
[reaction: see text] The conjugate addition of in situ generated zinc alkynylides is reported. The use of chiral, ephedrine derived acceptors provides access to enantiomerically enriched beta-alkynyl acids in good yields.