Catalytic activity of dithioic acid copper complexes in the alkyne–azide cycloaddition
作者:Bayardo E. Velasco、Gustavo López-Téllez、Nelly González-Rivas、Iván García-Orozco、Erick Cuevas-Yañez
DOI:10.1139/cjc-2012-0325
日期:2013.4
Diverse dithioicacid copper complexes exhibit a high catalytic activity in the copper-catalyzed alkyne–azide cycloaddition using several solvents under different temperatures, showing a high efficiency with only 0.005 mmol catalyst/mmol alkyne or less. A dithioicacid copper complex derived from acetophenone was selected and used as the catalyst in the preparation of a library of 1,4-disubstituted-1
Synthesis of 3-Alkoxy-4-Pyrrolin-2-ones via Rhodium(II)-Catalyzed Denitrogenative Transannulation of 1<i>H</i>-1,2,3-Triazoles with Diazo Esters
作者:Alexander N. Koronatov、Nikolai V. Rostovskii、Alexander F. Khlebnikov、Mikhail S. Novikov
DOI:10.1021/acs.orglett.0c02893
日期:2020.10.16
method for the synthesis of densely substituted 4-pyrrolin-2-ones by Rh(II)-catalyzed denitrogenative transannulation of 1-alkyl-4-aryl-1H-1,2,3-triazoles with diazo esters has been developed. The reaction proceeds via an attack of the rhodium-bound carbene at the N2 atom of the triazole and the formation of unstable 3,4-dihydro-1,2,4-triazine, which further undergoes ringcontraction to a 4-pyrrolin-2-one
已经开发了一种通过Rh(II)催化的1-烷基-4-芳基-1 H -1,2,3-三唑与重氮酯的脱氮脱环合成高取代度的4-吡咯啉-2-酮的方法。该反应通过在三唑的N2原子上与铑结合的卡宾的攻击和不稳定的3,4-二氢-1,2,4-三嗪的形成而发生,该化合物进一步经历环收缩成4-吡咯啉-2 -在铑催化下。该方法不适用于在C4处具有伯烷基取代基的1,2,3-三唑,该化合物可提供稳定的1,2,3-三唑-3-鎓烷基化物作为主要产物。
An Efficient Ultrasound-assisted Method for the Synthesis of 1,4-Disubstituted Triazoles
作者:Yuqin Jiang、Xiaolan Chen、Lingbo Qu、Junliang Wang、Jinwei Yuan、Senshen Chen、Xu Li
DOI:10.1515/znb-2011-0113
日期:2011.1.1
An efficient method for the synthesis of 1,4-disubstituted triazoles has been developed with the help of ultrasound irradiation in water at room temperature. Under the optimized conditions, a novel series of 1,4-disubstituted 1,2,3-triazoles was synthesized in high yields Graphical Abstract An Efficient Ultrasound-assisted Method for the Synthesis of 1,4-Disubstituted Triazoles
Metallic copper wire: a simple, clear and reusable catalyst for the CuAAC reaction in supercritical carbon dioxide
作者:Yuqin Jiang、Xing He、Weiwei Zhang、Xingfeng Li、Niu Guo、Yaru Zhao、Guiqing Xu、Wei Li
DOI:10.1039/c5ra11797f
日期:——
Relatively mild conditions, easy work-up and a simple purification; the stable and easily obtained catalyst presented here could be reused for more than 200 cycles for a 10 cm length of copper wire.