aminolysis reaction between various aryl esters and inert tertiaryamines by C–O and C–N bond activations has been developed for the selective synthesis of a broad scope of tertiary amides under neutral and mild conditions. The mechanism may undergo the two key steps of oxidativeaddition of acyl C–O bond in parent ester and C–N bond cleavage of tertiaryamine via an iminium-type intermediate.
Energy-Efficient Green Catalysis: Supported Gold Nanoparticle-Catalyzed Aminolysis of Esters with Inert Tertiary Amines by C–O and C–N Bond Activations
Catalyzed by supported gold nanoparticles, an aminolysis reaction between various aryl esters and inert tertiary amines by C–O and C–N bond activations has been developed for the selective synthesis of tertiary amides. Comparison studies indicated that the gold nanoparticles could perform energy-efficient green catalysis at room temperature, whereas Pd(OAc)2 could not.
Copper-Catalyzed Oxidative Dearomatization/Spirocyclization of Indole-2-Carboxamides: Synthesis of 2-Spiro-pseudoindoxyls
作者:Lingkai Kong、Mengdan Wang、Fangfang Zhang、Murong Xu、Yanzhong Li
DOI:10.1021/acs.orglett.6b03131
日期:2016.12.2
A copper-catalyzedoxidative dearomatization/spirocyclization of indole-2-carboxamides using tert-butyl hydroperoxide (TBHP) as the oxidant has been developed that provides rapid and efficient access to C2-spiro-pseudoindoxyls. Two of the sp2C–H bonds are functionalized during the reaction process, and the reaction likely proceeds via the formation of a highly reactive 3H-indol-3-one intermediate
Palladium-Catalyzed Dual C(sp<sup>2</sup>)–H Functionalization of Indole-2-carboxamides Involving a 1,2-Acyl Migration: A Synthesis of Indolo[3,2-<i>c</i>]quinolinones
作者:Lingkai Kong、Zhong Zheng、Rong Tang、Mengdan Wang、Yue Sun、Yanzhong Li
DOI:10.1021/acs.orglett.8b02419
日期:2018.9.21
A novel Pd/Cu catalytic system to construct indolo[3,2-c]quinolinones has been developed starting from indole-2-carboxamides, Substrates were transformed into indolo[3,2-c]quinolinones through dual C(sp(2))-H functionalization of the indole moiety and arene, in which a carbonyl 1,2-migration was involved. The corresponding products were obtained in moderate to excellent yields with a wide substrate scope.