Synthesis of pinacol arylboronates via cross-coupling reaction of bis(pinacolato)diboron with chloroarenes catalyzed by palladium(0)-tricyclohexylphosphine complexes

[摘要] The cross-coupling reaction of bis-(pinacolato)diboron with chloroarenes to yield pinacol arylboronates was carried out in 1,4-dioxane at 80 degreesC in the presence of KOAc (1.5 equiv.) and Pd(dba)(2)/2.4PCy(3) (3-6 mol%). The catalyst was also effective to carry out analogous coupling with aryl bromides or triflates under milder conditions than those of the previous procedures catalyzed by PdCl2(dppf) in DMSO. (C) 2001 Elsevier Science Ltd. All rights reserved.

[发布日期] 2001-12-03

[关键词] boron and compounds;coupling reactions;aryl halides;palladium and compounds