227803-35-2Relevant articles and documents
Synergistic Effect of Squaric Acid in Bromine-Catalyzed Deoxygenation of Sulfonyl Derivatives: Mechanistic Investigations and Synthetic Applications in Electrophilic (Fluoroalkyl)sulfenylation
Xiang, Haonan,Liu, Jie,Wang, Jieping,Jiang, Lvqi,Yi, Wenbin
supporting information, p. 181 - 185 (2021/12/17)
A method for electrophilic (fluoroalkyl)sulfenylation of nucleophiles by collaborative CTAB- and squaric acid-promoted deoxygenation of sulfonyl derivatives is reported. Mechanistic studies indicate that squaric acid dramatically decreased the energy barr
Domino C?S/C?N Bond Formation Using Well-Defined Copper-Phosphine Complex Catalyst: Divergent Approach to 3-Sulfenylated Indoles
Tamargo, Ramuel John Inductivo,Kim, Sung Hong,Lee, Yong Rok
, p. 4005 - 4015 (2019/07/18)
A protocol was developed for the synthesis of 3-thioindoles in good-to-excellent yields involving sulfenylation between 2-nitrocinnamaldehydes and various thiols using a well-defined copper(I)-phosphine complex catalyst. This unconventional divergent approach involves in situ generation of indoles via domino C?S/C?N bond formation initiated by sulfa-Michael addition followed by intramolecular N-heteroannulation. This protocol shows good chemoselectivity and broad substrate scope. To briefly demonstrate the value of this approach, 2-benzoyl-3-sulfenylated indoles were prepared from commercially available 2-nitrochalcones and thiols. (Figure presented.).
Direct, Metal-free C(sp2)?H Chalcogenation of Indoles and Imidazopyridines with Dichalcogenides Catalysed by KIO3
Rafique, Jamal,Saba, Sumbal,Franco, Marcelo S.,Bettanin, Luana,Schneider, Alex R.,Silva, Lais T.,Braga, Antonio L.
supporting information, p. 4173 - 4180 (2018/02/06)
Herein, we report a greener protocol for the synthesis of 3-Se/S-indoles and imidazo[1,2-a]pyridines through direct C(sp2)?H bond chalcogenation of heteroarenes with half molar equivalents of different dichalcogenides, using KIO3 as a non-toxic, easy-to-handle catalyst and a stoichiometric amount of glycerol. The reaction features are high yields, based on atom economy, easy performance on gram-scale, metal- and solvent-free conditions as well as applicability to different types of N-heteroarenes.