Metal- and Base-Free Three-Component Reaction of Ynones, Sodium Azide, and Alkyl Halides: Highly Regioselective Synthesis of 2,4,5-Trisubstituted 1,2,3-NH-Triazoles
A base- and metal-free three-component reaction of ynones, sodium azide, and alkyl halides is developed for the regioselective synthesis of 2,4,5-trisubstituted-1,2,3-triazoles. The method is general, convenient, environmentally benign, atom-economical, and high-yielding.
One-pot synthesis of 2,4,5-trisubstituted 1,2,3-triazoles through the cascade reactions of acid chlorides, terminal acetylenes, sodium azide and aryl halides
作者:Xiang Liu、Jihui Li、Baohua Chen
DOI:10.1039/c3nj40912k
日期:——
An efficient one-pot reaction of acid chlorides, terminal acetylenes, sodium azide and aryl halides is developed for the regioselective synthesis of 2,4,5-trisubstituted 1,2,3-triazoles. The method is general, convenient, eco-friendly, atom-economical, and could provide excellent yields and regioselectivities.
Method of regio-selective synthesis of tri-substituted-1, 2, 3-triazoles
申请人:Shi Xiaodong
公开号:US20100069644A1
公开(公告)日:2010-03-18
The embodiments provide for region-selective synthesis of tri-substituted 1,2,3-traizoles. A first embodiment provides for the selective N-2 alkylation of a 4,5-disubstituted 1,2,3-triazole. A second embodiment provides for the selective acetylation of a 4,5-disubstituted 1,2,3-triazole. A third embodiment provides for the selective arylation of a 4,5-disubstituted 1,2,3-triazole.
Efficient Synthesis of <i>N</i>-2-Aryl-1,2,3-Triazole Fluorophores via Post-Triazole Arylation
作者:Yuxiu Liu、Wuming Yan、Yunfeng Chen、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1021/ol802246q
日期:2008.12.4
Efficient post-triazole regloselective N-2 arylation was developed from C-4, C-5 disubstituted-1,2,3-NH-triazoles. Three different approaches had been investigated, including SNAr, Cu(I) catalyzed aryl amidation and Cu(II) mediated boronic acid coupling. The N-2-aryl triazoles were successfully synthesized with excellent yields. The structures were characterized by X-ray crystallography and some N-2-triazole products gave strong fluorescence with various emission controlled by the C-5 groups.