Direct Synthesis of 3-Acylindoles through Rhodium(III)-Catalyzed Annulation of<i>N</i>-Phenylamidines with α-Cl Ketones
作者:Jianhui Zhou、Jian Li、Yazhou Li、Chenglin Wu、Guoxue He、Qiaolan Yang、Yu Zhou、Hong Liu
DOI:10.1021/acs.orglett.8b03383
日期:2018.12.7
versatile 3-acylindoles through Rh(III)-catalyzed C–H activation and annulation cascade of N-phenylamidines with α-Cl ketones was developed, in which α-Cl ketones serve as unusual one-carbon (sp3) synthons. This strategy features high regioselectivity, efficiency, wide substrate tolerance, and mild reaction conditions, which further underscore its synthetic utility in drug molecule synthesis.
CuI-Catalyzed Amination of Arylhalides with Guanidines or Amidines: A Facile Synthesis of 1-<i>H</i>-2-Substituted Benzimidazoles
作者:Xiaohu Deng、Heather McAllister、Neelakandha S. Mani
DOI:10.1021/jo900912h
日期:2009.8.7
CuI/L5 (N,N′-dimethylethylenediamine) proves to be an efficient catalyst system for the amination of arylhalides with guanidines. The same catalyst system is then successfully applied to the one-step synthesis of 1-H-2-amino-benzimidazoles through tandem aminations of 1,2-dihaloarenes in modest yields. This methodology is also applicable for the preparation of 1-H or 1-substutituted 2-aryl- or 2-alkyl-benzimidazoles
事实证明,CuI / L5(N,N'-二甲基乙二胺)是一种用于将芳基卤化物与胍胺化的有效催化剂体系。然后将相同的催化剂体系成功地通过1,2-二卤代芳烃的串联胺化以适度的产率成功地一步合成1- H -2-氨基-苯并咪唑。该方法学也可用于制备1- H或1-取代的2-芳基-或2-烷基-苯并咪唑。
Vanadium-Catalyzed Oxidative C(CO)–C(CO) Bond Cleavage for C–N Bond Formation: One-Pot Domino Transformation of 1,2-Diketones and Amidines into Imides and Amides
作者:Chander Singh Digwal、Upasana Yadav、P. V. Sri Ramya、Sravani Sana、Baijayantimala Swain、Ahmed Kamal
DOI:10.1021/acs.joc.7b00950
日期:2017.7.21
identified that enables their transformation into imides and amides. The reaction proceeds by dual acylation of amidines via oxidative C(CO)–C(CO) bond cleavage of 1,2-diketones to afford N,N′-diaroyl-N-arylbenzamidine intermediates. In the reaction, these intermediates are easily hydrolyzed into imides and amides through vanadium catalysis. This method provides a practical, simple, and mild synthetic
N-Heterocyclic carbene-catalyzed annulation of ynals with amidines: access to 1,2,6-trisubstituted pyrimidin-4-ones
作者:Yangxi Xie、Jian Wang
DOI:10.1039/c8cc02023j
日期:——
A thiazolium-catalyzed annulation of ynals and amidines has been reported to construct pyrimidin-4-ones.
一种噻唑嗪催化的ynals和胺亚胺的环化反应已被报道用于构建嘧啶-4-酮。
Lewis acid-catalyzed 2-arylquinazoline formation from N′-arylbenzimidamides and paraformaldehyde
作者:Xiufang Cheng、Huamin Wang、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c6gc02319c
日期:——
An efficient procedure for the synthesis of 2-arylquinazolines from N'-arylbenzimidamides has been developed under transition-metal-free conditions. In this process, stable and low toxicity paraformaldehyde was used as the carbon source....