Palladium-Catalyzed Chemoselective Activation of sp<sup>3</sup> vs sp<sup>2</sup> C–H Bonds: Oxidative Coupling To Form Quaternary Centers
作者:Gang Hong、Pradip D. Nahide、Uday Kumar Neelam、Peter Amadeo、Arjun Vijeta、John M. Curto、Charles E. Hendrick、Kelsey F. VanGelder、Marisa C. Kozlowski
DOI:10.1021/acscatal.9b00091
日期:2019.4.5
activation of alkyl C–H bonds vs arene C–H bonds with Pd(OAc)2 has been found to be generalizable to a number of nucleophilic substrates, allowing the formation of a range of hindered quaternary centers. The substrates share a common mechanistic path wherein Pd(II) initiates an oxidative dimerization. The resultant dimer modifies the palladium catalyst to favor activation of alkyl C–H bonds, in contrast to
Here, we explore the GO‐catalyzed cross‐dehydrogenativecoupling of oxindoles with arenes and thiophenols for the rapid synthesis of 3‐aryloxindoles and 3‐sulfenylated oxindoles. Control experiments and small‐molecule mimicking studies reveal that the acidic nature and quinone‐type functionalities of GO are synergistically utilized for the coupling reaction. The reaction proceeds under simple and mild
Fe<sup>III</sup>-Catalyzed Cross-Dehydrogenative Arylation (CDA) between Oxindoles and Arenes under an Air Atmosphere
作者:Hong-Ru Wu、Hong-Yan Huang、Chuan-Li Ren、Li Liu、Dong Wang、Chao-Jun Li
DOI:10.1002/chem.201502519
日期:2015.11.16
An efficient FeIII‐catalyzedcross‐dehydrogenative arylation (CDA) of 3‐substituted oxindoles with activated arenes under an air atmosphere was developed to provide 3,3′‐disubstituted oxindoles in good yields.