Palladium-Catalyzed C(sp<sup>3</sup>)H Activation: A Facile Method for the Synthesis of 3,4-Dihydroquinolinone Derivatives
作者:Jia-Xuan Yan、Hu Li、Xiang-Wei Liu、Jiang-Ling Shi、Xin Wang、Zhang-Jie Shi
DOI:10.1002/anie.201402562
日期:2014.5.5
s were synthesized by the palladium‐catalyzed, oxidative‐addition‐initiated activation and arylation of inert C(sp3)H bonds. Pd(OAc)2 and P(o‐tol)3 were used as the catalyst and ligand, respectively, to improve the efficiency of the reaction. A further advantage of this reaction is that it could be performed in air. A relatively rare seven‐membered palladacycle was proposed as a key intermediate of
Ruthenium‐Catalyzed Vinylene Carbonate Annulation by C−H/N−H Functionalizations: Step‐Economical Access to Indoles
作者:Yao Yu、Yang Wang、Bo Li、Yuqiang Tan、Huan Zhao、Zheyu Li、Chunran Zhang、Wenbo Ma
DOI:10.1002/adsc.202101466
日期:2022.2.15
A convenient and effective method of ruthenium-catalyzed C−H/N−H annulations using vinylene carbonate as oxidizing acetylene surrogate has been disclosed. This method is scalable and compatible with a wide range of functional groups, providing a step-economical access to indolesynthesis Preliminary mechanistic studies provided support for a reversible, acetate-assisted C−H ruthenation, along with
A palladium catalyzed directinggroup assisted cross-coupling of aliphatic aziridines with indole, indoline, tetrahydroquinoline, and aniline has been developed to furnish the corresponding β-arylethylamine derivatives. The substrate scope was very general, and the protocol was also tolerated in the presence of various external additives. Control experiments suggested that the C–H cleavage step is
Regioselective <i>ortho</i> halogenation of <i>N</i>-aryl amides and ureas <i>via</i> oxidative halodeboronation: harnessing boron reactivity for efficient C–halogen bond installation
作者:Ganesh H. Shinde、Ganesh S. Ghotekar、Francoise M. Amombo Noa、Lars Öhrström、Per-Ola Norrby、Henrik Sundén
DOI:10.1039/d3sc04628a
日期:——
ortho position of N-aryl amides and ureas represents a tool to prepare motifs that are ubiquitous in biologically active compounds. To construct such prevalent bonds, most methods require the use of precious metals and a multistep process. Here we report a novel protocol for the long-standing challenge of regioselective ortho halogenation of N-aryl amides and ureas using an oxidative halodeboronation
Construction of Benzoxazinones from Anilines and Their Derivatives
作者:Teng-Fei Zhao、Xiao-Li Xu、Wei-Yin Sun、Yi Lu
DOI:10.1021/acs.orglett.3c01511
日期:2023.7.14
Herein we report a strategy concerning Rh(III)-catalyzed direct ortho-C–H bond carbonylation to construct benzoxazinones fromanilines and their derivatives with high atom economy. Interestingly, the corresponding amides were generated in situ fromanilines when excess Ac2O was added and directed the following C–H bond carbonylation to form benzoxazinones. Extensive functional group tolerance can be