14453-85-1Relevant articles and documents
Dimsyl Anion Enables Visible-Light-Promoted Charge Transfer in Cross-Coupling Reactions of Aryl Halides
Pan, Lei,Cooke, Maria Victoria,Spencer, Amara,Laulhé, Sébastien
, p. 420 - 425 (2021/11/01)
A methodology is reported for visible-light-promoted synthesis of unsymmetrical chalcogenides enabled by dimsyl anion in the absence of transition-metals or photoredox catalysts. The cross-coupling reaction between aryl halides and diaryl dichalcogenides proceeds with electron-rich, electron-poor, and heteroaromatic moieties. Mechanistic investigations using UV-Vis spectroscopy, time-dependent density functional theory (TD-DFT) calculations, and control reactions suggest that dimsyl anion forms an electron-donor-acceptor (EDA) complex capable of absorbing blue light, leading to a charge transfer responsible for generation of aryl radicals from aryl halides. This previously unreported mechanistic pathway may be applied to other light-induced transformations performed in DMSO in the presence of bases and aryl halides.
Flavin/I2 catalyzed aerobic oxidative C–H sulfenylation of anilines
Jiang, Xinpeng,Shen, Zhifeng,Zheng, Cong,Fang, Liyun,Chen, Keda,Yu, Chuanming
supporting information, (2020/07/24)
A flavin/I2 catalyzed aerobic oxidative C–H sulfenylation of anilines with thiols under mild reaction conditions is presented for the first time. This metal-free reaction provides an atom-economic pathway to prepare various aryl sulfides with outstanding functional group compatibility. Moreover, it consumes molecular oxygen as the only terminal oxidant and produces environmentally-friendly H2O as the only byproduct.
Method for synthesis of diaryl thioether compound without transition metal catalysis
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Paragraph 0034-0036, (2019/11/28)
The invention discloses a method for synthesis of a diaryl thioether compound without transition metal catalysis. The method includes: in the presence of a riboflavin catalyst, an iodine source, and an oxidant, reacting a compound shown as formula (1) or a compound shown as formula (4) with a compound shown as formula (2) in a solvent at 30-100DEG C for 1-40h, and subjecting the reaction solutionto post-treatment to obtain the diaryl thioether compound shown as formula (3) or formula (5). The reaction equation is shown as the specification, in the formula (1)-formula (5), R1 is selected fromC1-C4 alkyl, aryl, C1-C4 alkoxy, halogen, halogen-substituted C1-C4 alkyl, aryl, nitro, cyano, amino, or heterocyclic mercaptan; R2, R3, and R4 are independently selected from one of H, C1-C4 alkyl, halogen-substituted C1-C4 alkyl, and aryl respectively; R5 and R6 are independently selected from C1-C4 alkyl respectively, and Y represents element O. The method provided by the invention uses a riboflavin catalyst to replace a transition metal to synthesize the diaryl thioether compound, and has the advantages of green reaction, mild conditions, good substrate universality, high yield and the like.