Direct Boronation of Allyl Alcohols with Diboronic Acid Using Palladium Pincer-Complex Catalysis. A Remarkably Facile Allylic Displacement of the Hydroxy Group under Mild Reaction Conditions
作者:Vilhelm J. Olsson、Sara Sebelius、Nicklas Selander、Kálmán J. Szabó
DOI:10.1021/ja060468n
日期:2006.4.1
to allyl boronic acids and subsequently to trifluoro(allyl)borates with tetrahydroxy diboron using palladium pincer-complex catalysis. These reactions are regio- and stereoselective proceeding with high isolated yields. Competitive boronation experiments indicate that under the applied reaction conditions the allylic displacement of a hydroxy group is faster than the displacement of an acetate leaving
Palladium-Catalyzed Coupling of Allylboronic Acids with Iodobenzenes. Selective Formation of the Branched Allylic Product in the Absence of Directing Groups
作者:Sara Sebelius、Vilhelm J. Olsson、Olov A. Wallner、Kálmán J. Szabó
DOI:10.1021/ja062585o
日期:2006.6.1
Palladium-catalyzedcouplingreactions of functionalized allylboronic acids with iodobenzenes were achieved under standard Suzuki-Miyauracoupling conditions. The couplingreactions afforded selectively the branched allylic products in high to excellent yields. In contrast to palladium-catalyzed nucleophilic substitution reactions proceeding via (eta3-allyl)palladiumintermediates, this process does