[3 + 2] Cycloaddition of Isocyanides with Aryl Diazonium Salts: Catalyst-Dependent Regioselective Synthesis of 1,3- and 1,5-Disubstituted 1,2,4-Triazoles
作者:Jian-Quan Liu、Xuanyu Shen、Yihan Wang、Xiang-Shan Wang、Xihe Bi
DOI:10.1021/acs.orglett.8b03069
日期:2018.11.2
An unprecedented catalyst-dependent regioselective [3 + 2] cycloaddition of isocyanides with aryl diazonium salts is reported. 1,3-Disubstituted 1,2,4-triazoles were selectively obtained in high yield under Ag(I) catalysis, whereas 1,5-disubstituted 1,2,4-triazoles were formed by Cu(II) catalysis. These catalytic methodologies provide a controlled, modular, and facile access to 1,2,4-triazole scaffolds
Facile One-Pot Synthesis of Methyl 1-Aryl-1<i>H</i>
-1,2,4-triazole-3-carboxylates from Nitrilimines with Vilsmeier Reagent
作者:Shuo-En Tsai、Kun-Heng Chiang、Ching-Chun Tseng、Nai-Wei Chen、Ching-Yuh Chern、Fung Fuh Wong
DOI:10.1002/ejoc.201801808
日期:2019.2.28
A selective and convenient one‐pot methods have been developed for the synthesis of 1,2,4‐triazoles and methyl 1H‐1,2,4‐triazole‐3‐carboxylates by using hydrazonoyl hydrochlorides (nitrilimines) with Vilsmeier reagent. 2‐Amino‐2‐(2‐arylhydrazono)acetates were prepared from 2‐chloro‐2‐(2‐arylhydrazono)acetates with bis(trimethylsilyl)amine [NH(SiMe3)2] as the isolated intermediates for the further mechanistic
已经开发了一种选择性方便的单罐方法,该方法是通过使用肼基酰基盐酸盐(硝化亚胺)和Vilsmeier试剂来合成1,2,4-三唑和1 H - 1,2,4-三唑-3-羧酸甲酯。2-氨基-2-(2-芳基肼基)乙酸酯是由2-氯-2-(2-芳基肼基)乙酸酯与双(三甲基甲硅烷基)胺[NH(SiMe 3)2 ]作为分离的中间体制备的,用于进一步的机理研究。
Bruche, Luca; Garanti, Luisa; Zecchi, Gaetano, Journal of Heterocyclic Chemistry, 1989, vol. 26, # 26, p. 619 - 624
作者:Bruche, Luca、Garanti, Luisa、Zecchi, Gaetano
DOI:——
日期:——
Bruche, Luca; Garanti, Luisa; Zecchi, Gaetano, Journal of the Chemical Society. Perkin transactions I, 1985, p. 1903 - 1906
作者:Bruche, Luca、Garanti, Luisa、Zecchi, Gaetano
DOI:——
日期:——
A New Route to 5-Substituted 1<i>H</i>-1,2,4-Triazole-3-carboxylic Acid Esters