Mitsunobu Reaction of 1,2,3-NH-Triazoles: A Regio- and Stereoselective Approach to Functionalized Triazole Derivatives
作者:Wuming Yan、Tao Liao、Odbadrakh Tuguldur、Cheng Zhong、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1002/asia.201100357
日期:2011.10.4
The Mitsunobureaction was used in the preparation of chiral triazole derivatives. The reactions gave good to excellent yields with large substrate scope. Complete stereochemistry inversion was obtained, making this strategy one practical approach for the synthesis of enantiomeric enriched triazole analogous.
Facile synthesis and stereo-resolution of chiral 1,2,3-triazoles
作者:Ye Shi、Xiaohan Ye、Qiang Gu、Xiaodong Shi、Zhiguang Song
DOI:10.1039/c5ob00479a
日期:——
triazoles were used as starting materials, followed by sequential epoxidation, rearrangement and reduction to give the corresponding hydroxyl-triazoles. The CalB lipase catalyzed kinetic resolution gave enantiomericallypure (>99% ee) chiral triazoles in excellent yield. These new chiral TAs were also successfully applied as ligands in asymmetric addition of diethylzinc to aldehydes.
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.
Highly efficient synthesis of vinyl substituted triazoles by Au(I) catalyzed alkyne activation
作者:Haifeng Duan、Wuming Yan、Sujata Sengupta、Xiaodong Shi
DOI:10.1016/j.bmcl.2009.03.096
日期:2009.7
Au(I) catalyzed 1,2,3-triazole addition to non-activated alkyne was reported. A large group of substituted NH-1,2,3-triazoles were suitable for this transformation along with both internal and terminal alkynes. The N-1 and N-2 vinyl substituted 1,2,3-triazoles were prepared in up to 98% yield with as low as 0.2% catalyst loading, thereby providing a new protocol for the synthesis of potentially biological-active vinyl-triazole building blocks. (C) 2009 Elsevier Ltd. All rights reserved.
Conformational control in the regioselective synthesis of N-2-substituted-1,2,3-triazoles
作者:Yunfeng Chen、Yuxiu Liu、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1039/b805328f
日期:——
An effective strategy for the synthesis of N-2-substituted-1,2,3-triazoles with excellent yields and regioselectivity has been developed.