Pd(II)-Catalyzed Primary-C(sp<sup>3</sup>)–H Acyloxylation at Room Temperature
作者:Raja K. Rit、M. Ramu Yadav、Akhila K. Sahoo
DOI:10.1021/ol301579q
日期:2012.7.20
With the aid of a novel S-methyl-S-2-pyridyl-sulfoximine (MPyS) directing group (DG), the unactivated primary beta-C(sp(3))-H bond of MPyS-N-amides oxidizes at room temperature. The catalytic conditions are applicable to the diacetoxylation of primary beta,beta'-C(sp(3))-H bonds, and the carboxylic acid solvent is pivotal in the formation of the C-O bond. The MPyS-DG cleaves from the oxidation products and is recovered. This method provides convenient access to alpha,alpha'-disubstituted-beta-hydroxycarboxylic acids.