The cross-couplingreaction of allylic carbonates with organosilanes was found to proceed without fluoride ion activation under mild conditions by using a coordinatively unsaturated palladium complex as a catalyst. The reaction was assumed to proceed through an allylpalladium alkoxide derived from the allylic carbonate substrate and a palladium(0) species, the alkoxo ligand activating the organosilicon
Stereospecific Allyl-Aryl Coupling Catalyzed by<i>in situ</i>Generated Palladium Nanoparticles in Water under Ambient Conditions
作者:Jingming Zhao、Jiang Ye、Yong Jian Zhang
DOI:10.1002/adsc.201200704
日期:2013.2.1
practical process for the stereospecific cross-coupling of secondary allylic carbonates with arylboronic acids has been developed. The reaction is catalyzed by in situ generated palladiumnanoparticles (PdNPs) without any ligands and additional stabilizers in waterunderambientconditions and furnishes the allyl–arylcoupling products in high isolated yields with high stereospecificities as well as excellent
Alkenylfluorosilanes smoothly underwent cross-coupling reaction with allylic carbonates in the presence of a palladiun catalyst and in the absence of fluoride ion to give 1,4-dienes in good yields with retention of configuration.