- Unveiling Potent Photooxidation Behavior of Catalytic Photoreductants
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We describe a photocatalytic system that reveals latent photooxidant behavior from one of the most reducing conventional photoredox catalysts, N-phenylphenothiazine (PTH). This aerobic photochemical reaction engages difficult to oxidize feedstocks, such as benzene, in C(sp2)-N coupling reactions through direct oxidation. Mechanistic studies are consistent with activation of PTH via photooxidation and with Lewis acid cocatalysts scavenging inhibitors inextricably formed in this process.
- Targos, Karina,Williams, Oliver P.,Wickens, Zachary K.
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- The azide-alkyne cycloaddition catalysed by transition metal oxide nanoparticles
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Colloidal nanoparticles of Earth-abundant, first-row transition metal oxides and sulfide, namely magnetite (Fe3O4), manganese and cobalt ferrite, (MnFe2O4, CoFe2O4), manganese(ii) oxide (Mn
- Molteni, Giorgio,Ferretti, Anna M.,Trioni, Mario Italo,Cargnoni, Fausto,Ponti, Alessandro
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p. 18049 - 18061
(2019/12/03)
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- TBAI or KI-Promoted Oxidative Coupling of Enamines and N-Tosylhydrazine: An Unconventional Method toward 1,5- and 1,4,5-Substituted 1,2,3-Triazoles
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A novel method for the synthesis of 1,5- and 1,4,5-substituted 1,2,3-triazoles has been reported. This approach is promoted by iodine-TBHP oxidation system using enamines and N-tosylhydrazine as materials, which avoid the dependence of traditional methods on azides and transition metals. Through this approach, various 1,5- and 1,4,5-substituted 1,2,3-triazoles were delivered in moderate to high yields. The mechanistic study indicated that an amino exchange would be involved in the reaction process. Moreover, the product methyl 1-(2-methoxyphenyl)-4-methyl-1H-1,2,3-triazole-5-carboxylate is a useful precursor to anti-influenza A agent, and further application research was conducted. (Figure presented.).
- Huang, Wei,Zhu, Chuanle,Li, Minke,Yu, Yue,Wu, Wanqing,Tu, Zhengchao,Jiang, Huanfeng
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p. 3117 - 3123
(2018/08/01)
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- Pressure-accelerated azide-alkyne cycloaddition: Micro capillary versus autoclave reactor performance
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Pressure effects on regioselectivity and yield of cycloaddition reactions have been shown to exist. Nevertheless, high pressure synthetic applications with subsequent benefits in the production of natural products are limited by the general availability o
- Borukhova, Svetlana,Seeger, Andreas D.,Nol, Timothy,Wang, Qi,Busch, Markus,Hessel, Volker
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p. 504 - 512
(2015/03/04)
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- 3-nitro- and 3-bromo-3-nitroacrylates in reactions with phenyl azide
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1,3-Dipolar cycloaddition of alkyl 3-nitro-and 3-bromo-3-nitroacrylates to phenyl azide gives regioisomeric alkyl 5(4)-nitro-1-phenyl-4,5-dihydro-1H-1,2,3- triazole-4(5)-carboxylates, the corresponding triazoles both with and without nitro group, and alky
- Berestovitskaya,Anisimova,Kataeva,Makarova,Berkova
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p. 1567 - 1575
(2008/03/14)
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- Arylazide cycloaddition to methyl propiolate: DFT-based quantitative prediction of regioselectivity
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Several 1-(4-substituted)-phenyl-4- or 5-methoxycarbonyl-1,2,3-triazoles have been synthesized by 1,3-dipolar cycloaddition of the corresponding arylazides to methyl propiolate in carbon tetrachloride. The regioselectivity of these reactions cannot be rat
- Molteni, Giorgio,Ponti, Alessandro
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p. 2770 - 2774
(2007/10/03)
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- CYCLOADDITION DES METHYLAZIDE ET PHENYLAZIDE AU β-NITROSTYRENE ET AU NITROPROPENE HOMOLOGUE
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Phenylazide and methylazide reacts with title olefines and gives two isomeric triazoles without nitro group, and 4-nitro-1,2,3 triazole.The isomerisation of starting alkenes explains the formation of isomeric triazoles.Oxydation of amino-nitro-diazocompounds in equilibrium with 1,2,3 triazolines leads to 4-nitro-1,2,3 triazoles.
- Cailleux, P.,Piet, J. C.,Benhaoua, H.,Carrie, R.
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