Stereoselective Intermolecular Allylic C–H Trifluoroacetoxylation of Functionalized Alkenes
作者:Rauful Alam、Lukasz T. Pilarski、Elias Pershagen、Kálmán J. Szabó
DOI:10.1021/ja302457p
日期:2012.5.30
Pd-catalyzed allylic C-H trifluoroacetoxylation of substituted alkenes was performed using PhI(OCOCF3)(2) as the oxidant and acyloxy source. Trifluoroacetoxylation of monosubstituted cyclopentenes and cyclohexenes proceeds with excellent regio- and diastereoselectivity. Studies with one of the possible (eta(3)-allyl)Pd(II) intermediates suggest that the reaction proceeds via stereoselective formation of Pd(IV) intermediates and subsequent stereo- and regioselective reductive elimination of the product.