Regioselective synthesis of 1,2,3-triazole derivatives via 1,3-dipolar cycloaddition reactions in waterElectronic supplementary information (ESI) available: experimental procedures, elemental analyses and spectroscopic data. See http://www.rsc.org/suppdata/cc/b3/b307084k/
作者:Zhong-Xia Wang、Hua-Li Qin
DOI:10.1039/b307084k
日期:——
Reaction of an arylacetylene with an azide in hot water gave 1,4-disubstituted 1,2,3-triazoles in high yields, while similar reaction between a terminal aliphatic alkyne and an azide (except m-nitroazidobenzene) afforded a mixture of regioisomers with the ratio of 1,4- to 1,5-isomers ranging from 3:1 to 28.6:1. Reactions of m-nitroazidobenzene with either arylalkynes or aliphatic alkynes formed only
An Efficient Solid-Phase Synthesis of Substituted Isoxazole, Triazole, and Cycloalkadiene Derivatives Using Supported Selenium Resin
作者:Xian Huang、Yu-Guang Wang、Wei-Ming Xu
DOI:10.1055/s-2006-950366
日期:2007.1
We have developed efficient methods for the syntheses of 3,5-disubstituted isoxazoles and 1,2,3-triazoles, and 1,3- and 1,4-cycloalkadiene derivatives using polymer-supported selenium resin. The advantages of these methods include straightforward operation, lack of odor, good stability, and high purity of the products.
Alkyl Propiolates Participated [3+2] Annulation for the Switchable Synthesis of 1,5‐ and 1,4‐Disubstituted 1,2,3‐Triazoles Containing Ester Side Chain
作者:Shuo Cao、Yunyun Liu、Changfeng Hu、Chengping Wen、Jie‐Ping Wan
DOI:10.1002/cctc.201801366
日期:2018.11.7
By means of a featured enamine activation, the alkylpropiolates have been successfully employed in the [3+2] annulation for the synthesis of 1,2,3‐triazoles. The synthesis of both 1,4‐ as well as the hardly available 1,5‐disubstituted1,2,3‐triazoles can be selectively accessed by using tosyl azide and tosyl hydrazine as nitrogen source, respectively.
作者:Florian Kloss、Uwe Köhn、Burkhard O. Jahn、Martin D. Hager、Helmar Görls、Ulrich S. Schubert
DOI:10.1002/asia.201100404
日期:2011.10.4
Abstract[3+2]‐cycloaddition reactions of aromatic azides and silylated alkynes in aqueous media yield 1,5‐disubstituted‐4‐(trimethyl‐silyl)‐1H‐1,2,3‐triazoles. The formation of the 1,5‐isomer is highly favored in this metal‐free cycloaddition, which could be proven by 1D selective NOESY and X‐ray investigations. Additionally, DFT calculations corroborate the outstanding favoritism regarding the 1,5‐isomer. The described method provides a simple alternative protocol to metal‐catalyzed “click chemistry” procedures, widening the scope for regioselective heavy‐metal‐free synthetic applications.
Direct Pd-Catalyzed Arylation of 1,2,3-Triazoles
作者:Stepan Chuprakov、Natalia Chernyak、Alexander S. Dudnik、Vladimir Gevorgyan
DOI:10.1021/ol070697u
日期:2007.6.1
A highly efficient method for the synthesis of multisubstituted 1,2,3-triazoles via a direct Pd-catalyzed C-5 arylation has been developed.