Publication Details (including relevant citation information):
Dmitry Tsvelikhovsky,a Dikla Pessing,a David Avnir,a,* and Jochanan Bluma,*
Adv. Synth. Catal. 2008, 350, 2856 – 2858
Institute of Chemistry, The Hebrew University, Jerusalem 91904, Israel
While the Heck coupling of aryl bromides with styrenes by palladium acetate entrapped within octylated silica sol-gel forms almost entirely trans-stilbenes, the catalysis by the palladium com- pound within the cis-pre-imprinted support gives stilbenes that are substantially enriched by cis-ori- ented isomers. Although the ceramic support is completely freed from the imprint prior to the cou- pling process, cis-stilbenes are formed with similar selectivities upon recycling of the catalyst systems for at least four consecutive runs.