Copper nanoparticles incorporated on a mesoporous carbon nitride, an excellent catalyst in the Huisgen 1,3-dipolar cycloaddition and<i>N</i>-arylation of<i>N</i>-heterocycles
作者:Siyavash Kazemi Movahed、Parinaz Salari、Melika Kasmaei、Mahsa Armaghan、Minoo Dabiri、Mostafa M. Amini
DOI:10.1002/aoc.3914
日期:2018.1
XRD and N2 adsorption isotherms show that it maintains a hexagonal mesoporous structure with a high surface area (600.03 m2 g−1). The embedded Cu nanoparticles exhibit extremely high catalytic performance in two different kinds of organic reactions. The Huisgen 1,3‐dipolar cycloaddition and N‐arylation of N‐heterocycles were all accomplished.
具有约10nm的平均粒径的Cu纳米颗粒被掺入到中孔氮化碳载体的表面上。XRD和N 2吸附等温线表明,它保持了具有高表面积(600.03 m 2 g -1)的六方介孔结构。包埋的铜纳米颗粒在两种不同的有机反应中显示出极高的催化性能。全部完成了Huisgen 1,3-偶极环加成和N-杂环的N-芳基化。
Application of Photoclick Chemistry for the Synthesis of Pyrazoles via 1,3-Dipolar Cycloaddition between Alkynes and Nitrilimines Generated In Situ
作者:Richard Remy、Christian G. Bochet
DOI:10.1002/ejoc.201701225
日期:2018.1.23
The photolysis of tetrazoles leads to the extrusion of dinitrogen and forms a reactive nitrile imine intermediate. The latter can then react in situ with alkynes in a [3+2] cycloaddition providing pyrazoles. Some reactivity trends were identified, such as a preference for electron‐poor alkynes. On the tetrazole part, there is a clear preference for either aromatic or conjugated substituents.
Regiospecific Synthesis of N2-Aryl 1,2,3-Triazoles from 2,5-Disubstituted Tetrazoles via Photochemically Generated Nitrile Imine Intermediates
作者:Robert Harris、Craig Jamieson、Sam Stewart
DOI:10.1055/s-0034-1379010
日期:——
The synthesis of N2-aryl 1,2,3-triazoles from 2,5-disubstituted tetrazoles was achieved under photochemical conditions. This simple and mild one-step reaction provides regiospecific access to 2,4,5-substituted 1,2,3-triazoles via a nitrile imine intermediate. Syntheses of alkyl and heterocylic derivatives were also investigated.