A series of unsymmetrical triazine–triazole conjugates were prepared by the copper-catalyzed cycloaddition reactions of 2-azide-4,6-dimethoxy-1,3,5-triazine with terminal alkynes under mild reactio...
Solvent-Directed Click Reaction between Active Methylene Compounds and Azido-1,3,5-triazines
作者:Ziqiang Yan、Yuanheng Li、Mingming Ma
DOI:10.1021/acs.orglett.9b02089
日期:2019.9.20
A novel solvent-directed click reactionbetween active methylene compounds and azido-1,3,5-triazines has been developed. In aqueous solution, the regiospecific trisubstituted 1,2,3-triazole products are quickly synthesized in high yields under mild conditions and easy to separate without column chromatography. This click reaction is controlled by the protonation of a nitrogen anion intermediate, and
Solvent-Directed Transition Metal-Free C–C Bond Cleavage by Azido-1,3,5-triazines and Their Stability-Reactivity Paradox
作者:Fulei Ma、Xiaoyu Xie、Yuanheng Li、Ziqiang Yan、Mingming Ma
DOI:10.1021/acs.joc.0c02342
日期:2021.1.1
We report a solvent-directed and regioselective carbon–carbon bondcleavage of aryl ketones by azido-1,3,5-triazines (ATs), which is typically completed within 10 min in DMSO at room temperature, without using transition metal catalysts. The cleavage is driven by the steric hindrance in the adducts of aryl ketones and ATs, which is substantiated by DFT calculation. Our recent results showed that ATs
Diastereoselective synthesis of 1,2,3-triazolines fused with pentane and dihydropyran rings
作者:Nikolay A. Belyaev、Tetyana V. Beryozkina、Vasiliy A. Bakulev、Oleg S. Eltsov、Gert Lubec
DOI:10.1007/s10593-018-2382-z
日期:2018.10
As a result of studying the reactions of 5-azido-1-methyl-4-nitroimidazole and 2,4,5-trimethoxy-1,3,5-triazine with endocyclic enamines, a diastereoselective method was developed for the synthesis of 1-hetarylcycloalkano[1,2,3]triazolines with cis configuration of substituents at the bridgehead carbon atoms. The structures of the obtained reaction products were studied by methods of NMR spectroscopy