Copper(I)–N-Heterocyclic Carbene Complexes as Efficient Catalysts for the Synthesis of 1,4-Disubstituted 1,2,3-Sulfonyltriazoles in Air
作者:Faïma Lazreg、Catherine S. J. Cazin
DOI:10.1021/acs.organomet.7b00506
日期:2018.3.12
Bis-NHC and mixed NHC/PR3 copper(I) complexes (NHC = N-heterocyclic carbene) were found to be efficientcatalysts enabling the azide–alkyne cycloaddition reaction leading to the formation of 1,2,3-sulfonyltriazoles under Click conditions. The mechanism of this transformation was probed and decoordination of the NHC ligand (even in the NHC/PR3 mixed ligand systems) during the catalytic transformation
Copper and Rhodium Relay Catalysis for Selective Access to <i>cis</i>-2,3-Dihydroazepines
作者:You Li、Han Luo、Zongyuan Tang、Yingzi Li、Luan Du、Xiaolan Xin、Shanshan Li、Baosheng Li
DOI:10.1021/acs.orglett.1c02262
日期:2021.8.20
access synthetically challenging cis-2,3-dihydroazepines is reported. The reaction starts with readily available dienals, alkynes, and sulfonyl azides as the substrates and employs copper and rhodium as relay catalysts. Key steps include a copper-catalyzed reaction between an alkyne and a sulfonyl azide to form a triazole intermediate. The subsequent activation of this triazole intermediate by a rhodium
<i>N</i>
<sup>2</sup>
-Selective Autocatalytic Ditriazolylation Reactions of Cyclopropenones and Tropone with <i>N</i>
<sup>1</sup>
-Sulfonyl-1,2,3-triazoles
作者:Long-Hai Li、Yu Jiang、Jian Hao、Yin Wei、Min Shi
DOI:10.1002/adsc.201700936
日期:2017.10.4
N2‐Selective autocatalytic ditriazolylation reactions of cyclopropenones and tropone with N1‐sulfonyl‐1,2,3‐triazoles are reported for the first time. In contrast to previous methods for preparing N2‐substituted bis(1,2,3‐triazolyl) compounds, the present reaction achieved ditriazolylation in one step under simple and user‐friendly conditions with a wide substrate scope. A plausible mechanism has been