Pinacol Coupling Reaction of β-Halo-α,β-unsaturated Aldehydes Promoted by TiI4
摘要:
[GRAPHICS]The pinacol reaction of beta-halogenated alpha,beta-unsaturated aldehydes was promoted by titanium tetraiodide to give coupling products in good yields with high di-selectivity. Subsequent reduction with H-2/Pd-C gave saturated vic-diols in good yields. Heck coupling reaction enabled the displacement of halogens with vinyl groups without the loss of stereochemical integrities.
[GRAPHICS]The pinacol reaction of beta-halogenated alpha,beta-unsaturated aldehydes was promoted by titanium tetraiodide to give coupling products in good yields with high di-selectivity. Subsequent reduction with H-2/Pd-C gave saturated vic-diols in good yields. Heck coupling reaction enabled the displacement of halogens with vinyl groups without the loss of stereochemical integrities.