Browsing by Author "Arvind Kumar Yadav"

Now showing 1 - 7 of 7

Iodine-catalyzed thioallylation of indoles using Bunte salts prepared from Baylis-Hillman bromides
(Royal Society of Chemistry, 2021) Prince Kumar Gupta; Arvind Kumar Yadav; Anup Kumar Sharma; Krishna Nand Singh
Metal-free iodine-catalyzed regioselective thioallylation of indoles has been accomplished at room temperature using Bunte salts prepared from Baylis-Hillman bromides. The resulting multi-functional C3 thioallylated indoles exhibit ample structural diversity and good functional group tolerance. © The Royal Society of Chemistry 2021.
Metal-free denitrative arylation of β-nitrostyrenes using benzoyl peroxide: An easy access to: Trans -stilbenes
(Royal Society of Chemistry, 2017) Arvind Kumar Yadav; Krishna Nand Singh
A simple, novel and stereoselective synthesis of trans-stilbenes has been described using denitrative arylation of β-nitrostyrenes in the presence of benzoyl peroxide under metal-free conditions. The reaction is assumed to involve homolytic cleavage of benzoyl peroxide followed by decarboxylation to generate a phenyl radical, which brings about ipso-substitution of the nitro group of nitrostyrenes to afford trans-stilbenes. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2017.
Retraction: Visible-light-induced oxidative difunctionalization of styrenes: synthesis of α-trifluoromethylthio-substituted ketones (Chemical Communications (2018) 54 (1976-1979) DOI: 10.1039/c7cc09953c)
(Royal Society of Chemistry, 2019) Arvind Kumar Yadav; Krishna Nand Singh
We the named authors hereby wholly retract this Chemical Communications article due to the fact that the paper has fundamental errors in the identification of the synthetic products from the experimental data. In the article the product of the reaction were identified as a-trifluoromethylthio-substituted ketones however subsequent analysis by independent experts and the authors indicates that the products were trifluoromethyl-substituted instead. The authors sincerely apologise for this inadvertent mistake on their part. Given the significance of the errors to the conclusions presented in this paper, it is necessary to retract it to maintain the validity of the scientific record. © 2019 The Royal Society of Chemistry.
Silver-Catalyzed Decarboxylative Trifluoromethylthiolation of Cinnamic Acids: An Easy Access to α-Trifluoromethylthiolated Ketones
(Wiley-VCH Verlag, 2018) Anup Kumar Sharma; Arvind Kumar Yadav; Krishna Nand Singh
A silver-catalyzed decarboxylative difunctionalization of cinnamic acids has been developed to afford a variety of α-trifluoromethylthiolated ketones under mild reaction conditions using in situ generated SCF3 source by the combination of Langlois’ reagent and CS2. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Visible light enabled γ-trifluoromethylation of Baylis-Hillman acetates: Stereoselective synthesis of trisubstituted alkenes
(Royal Society of Chemistry, 2019) Arvind Kumar Yadav; Anup Kumar Sharma; Krishna Nand Singh
A distinct visible light induced γ-trifluoromethylation of Baylis-Hillman acetates has been accomplished using eosin Y as a photoredox catalyst and bench stable Langlois' reagent (CF3SO2Na) as a CF3 source under metal-free conditions at room temperature to afford various trisubstituted alkenes. The product stereochemistry is predominantly trans (E), and involves trifluoromethylation followed by de-acetoxylation. © 2019 the Partner Organisations.
Visible Light-Triggered β-Allylation of Indoles Using Baylis-Hillman Bromides
(Wiley-VCH Verlag, 2020) Prince Kumar Gupta; Arvind Kumar Yadav; Krishna Nand Singh
A facile regioselective β-allylation of indoles has been accomplished employing Baylis-Hillman bromides as allyl source under visible light photoredox catalysis in the presence of Ru(bpy)3Cl2.6H2O and blue LED. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Visible-light-induced oxidative difunctionalization of styrenes: Synthesis of α-trifluoromethylthio-substituted ketones
(Royal Society of Chemistry, 2018) Arvind Kumar Yadav; Krishna Nand Singh
A novel and practical synthesis of α-trifluoromethylthio-substituted ketones has been accomplished through the visible-light-induced aerobic oxidation of styrenes. The protocol employs the combination of CF3SO2Na and CS2 as a new source of SCF3 radicals in the presence of eosin Y as a photoredox catalyst. © The Royal Society of Chemistry 2018.