A practical and greener method of the cross-coupling of vinylethylene carbonates (VECs) with arylboronicacids has been described. The coupling reaction was catalyzed by in situ generated palladium nanoparticles (PdNPs) without any ligands and additional stabilizers in water under ambient conditions to provide useful 4-hydroxylprenylarenes and their derivatives in good to high yields.
作者:Paul S. Fordred、D. Gangani Niyadurupola、Richard Wisedale、Steven D. Bull
DOI:10.1002/adsc.200900309
日期:2009.10
Treatment of allylicalcohols containing a 1,1-disubstituted alkene with a palladium catalyst and hydrogen gas (1 bar) results in facile isomerization to their corresponding trisubstituted (E)-allylic alcohols, along with small amounts of the corresponding hydrogenated products.