designed fluorene-based mono- and bimetallic Pd–PEPPSI complexes were synthesized and demonstrated to be effective for the one-pot sequential α-arylation/alkylation of oxindoles. This streamlined approach offers efficient access to functionalized 3,3-disubstitutedoxindoles in excellent yields (up to 89%) under mild reaction conditions.
Copper-catalyzed bis-arylations of alkenes leading to oxindole derivatives
作者:Liangliang Shi、Yuyuan Wang、Haijun Yang、Hua Fu
DOI:10.1039/c4ob00576g
日期:——
A simple and practical copper-catalyzed approach to oxindole derivatives by copper-catalyzed bis-arylation of N-alkyl-N-phenylacrylamides with diaryliodonium triflates has been developed under mild conditions, and the method is of tolerance towards some functional groups in the substrates.
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
Nickel-Catalyzed Domino Heck Cyclization/Suzuki Coupling for the Synthesis of 3,3-Disubstituted Oxindoles
作者:Yuxiu Li、Kuai Wang、Yuanyuan Ping、Yifan Wang、Wangqing Kong
DOI:10.1021/acs.orglett.7b03713
日期:2018.2.16
The first nickel-catalyzed domino Heck cyclization/Suzukicoupling reaction for the synthesis of 3,3-disubstituted oxindoles bearing quaternary all-carbon centers is reported. A wide range of electrophiles, such as aryl iodides, bromides, triflates, and chlorides, are all compatible with the reaction conditions. Moreover, cheap aryl esters, which undergo catalytic C–O bond cleavage, could also be employed
Oxindole Synthesis by Direct Coupling of C sp 2H and C sp 3H Centers
作者:Yi-Xia Jia、E. Peter Kündig
DOI:10.1002/anie.200805652
日期:——
An sp2/sp3 get‐together: A novel and efficient method can be used to synthesize 3,3‐disubstitued oxindoles by the direct intramolecular oxidative coupling of an aryl CH and a CH center (see scheme; DMF=N,N‐dimethylformamide).