Allylic alcohols can be used directly for the palladium(0)-catalyzed allylation of aryl- and alkenylboronic acids with a wide variety of functional groups. A triphenylphosphine-ligated palladium catalyst turns out to be most effective for the cross-coupling reaction and its low loading (less than 1 mol%) leads to formation of the coupling product in high yield. The Lewis acidity of the organoboron
Nickel-Catalyzed Direct Coupling of Allylic Alcohols with Organoboron Reagents
作者:Gaonan Wang、Yi Gan、Yuanhong Liu
DOI:10.1002/cjoc.201800237
日期:2018.10
The direct coupling of allylicalcohols with arylboronic acids or their derivatives catalyzed by Ni(cod)2 in the presence of a catalytic amount of base has been developed. A wide variety of allylic substrates or arylboronic acids turned out to be applicable to this catalytic system. The present method does not require the use of ligands for stabilizing the nickel catalyst in most cases or additional
Palladium(0)-catalyzed direct cross-coupling reaction of allyl alcohols with aryl- and vinyl-boronic acidsElectronic supplementary information (ESI) available: spectral data of compounds. See http://www.rsc.org/suppdata/cc/b4/b402256d/
oxidative allylic C(sp3)–H arylation by radical relay using a broad range of heteroaryl boronicacids with inexpensive and readily available unactivated terminal and internal olefins. This C(sp2)–C(sp3) allyl coupling has the advantage of using cheap, abundant, and nontoxic Cu2O without the need to use prefunctionalized alkenes, thus offering an alternative method to allylic arylation reactions that employ
A palladiumcatalyzed Suzuki cross-coupling for construction of Csp3–Csp2 bond via Csp3–N bond activation of benzyltrimethyl-ammonium salt is described. This reaction not only offered a highly efficientapproach to diarylmethanes but also paved the way for the application of benzyltrimethylammonium salts in the palladiumcatalyzedcrosscouplingreactions.