Divergent strategy for the chemoselective synthesis of N-Arylbenzimidazoles and N-Arylindazoles from arylamino oximes
摘要:
An efficient and divergent synthesis of N-arylbenzimidazoles and N-arylindazoles from arylamino oximes based on reaction conditions selection was developed. The synthesis was approached by treating oximes with BTC and the chemoselectivity was regulated by the amount of Et3N. This switchable N-N and N-C bond formation process features mild reaction conditions, simple execution, high chemoselectivity and broad substrate scope. (C) 2020 Elsevier Ltd. All rights reserved.
Sodium Butylated Hydroxytoluene: A Functional Group Tolerant, Eco‐Friendly Base for Solvent‐Free, Pd‐Catalysed Amination
作者:Volodymyr Semeniuchenko、Wilfried M. Braje、Michael G. Organ
DOI:10.1002/chem.202101617
日期:2021.9
NaBHT (sodium 2,6-di-tert-butyl-4-methylphenolate), a strong, but hindered and lipophilic base, has been effectively paired with similarly lipophilic, high-reactivity Pd-NHC (N-heterocyclic carbene) catalysts to produce an ideal combination for performing solvent-free (melt) cross-coupling amination. The mild nucleophilicity of NaBHT, coupled with the anti-oxidant properties of its conjugate acid byproduct
Copper-Catalyzed Electrophilic Amination of Arylboronic Acids with Anthranils: An Access to <i>N</i>-Aryl-2-aminophenones
作者:Yang Gao、Simin Yang、Yibiao Li、Yanping Huo、Zongyi Huang、Zumin Chen、Xiao-Qiang Hu
DOI:10.1021/acs.joc.0c01109
日期:2020.8.7
An efficient copper-catalyzed electrophilicamination strategy has been established for the rapid synthesis of N-aryl-2-aminophenones from readily available arylboronic acids/esters and anthranils. This protocol features good functional group tolerance, broad substrate scope, and operational simplicity. Moreover, a tandem C–H borylation and C–N coupling protocol has also been developed to transform
which involves the connection of two substituents through a benzene ring, is rarely recognized as a related idea. In this article, we present synthesis and physical properties, including their structure and reactivity of phenylogous amides. This amide mimetic unit is relatively stable and easily prepared by the Hartwig–Buchwald amination reaction. The effect of the resonance was examined by means
Copper-catalyzed intramolecular direct amination of sp2 C–H bonds for the synthesis of N-aryl acridones
作者:Wang Zhou、Yong Liu、Youqing Yang、Guo-Jun Deng
DOI:10.1039/c2cc35425j
日期:——
A copper-catalyzed approach for the synthesis of N-arylacridones via sp(2) C-H bond amination using air as oxidant under neutral conditions is disclosed. This reaction not only provides a complementary method for synthesizing medicinally important acridones, but also offers a new strategy for sp(2) C-H bond amination.
Rapid construction of acridines via BF3•Et2O promoted cyclization of 2-phenylamino benzophenones
作者:Liuyang Deng、Ranran Guo、Lianjie Wang、Cao Yang、Zechao Wang
DOI:10.1016/j.tetlet.2022.154044
日期:2022.8
benzophenone promoted by BF3•Et2O has been developed. The reaction goes through the intramolecular Friedel–Crafts acylation and dehydration with a facile work-up procedure. It shows good functional group tolerance and the yields of acridines are mostly in range of 90–99 %. The efficiency of this reaction is tremendously high, which can be completed within 30 min. Gram-scale synthesis and synthetic