139696-88-1Relevant articles and documents
Facile synthesis of dimeric BODIPY and its catalytic activity for sulfide oxidation under visible light
Wang, Liang,Cao, Jing,Wang, Jian-Wei,Chen, Qun,Cui, Ai-Jun,He, Ming-Yang
, p. 14786 - 14790 (2014)
An orthogonal dimeric BODIPY was easily prepared via condensation of 2,4-dimethylpyrrole and oxalyl dichloride, and was utilized as a visible-light-driven photocatalyst for the oxidation of sulfides. High catalytic efficiencies, and mild and green conditi
Transition-metal-free highly efficient aerobic oxidation of sulfides to sulfoxides under mild conditions
Zhang, Hua,Chen, Chunyu,Liu, Renhua,Xu, Qiang,Zhao, Weiqie
, p. 83 - 92 (2010)
A highly efficient transition-metal-free catalytic system Br 2/NaNO2/H2O has been developed for a robust and economic acid-free aerobic oxidation of sulfides. It is noteworthy that the sulfide function reacts under mild co
Metal- and Additive-Free Oxidation of Sulfides into Sulfoxides by Fullerene-Modified Carbon Nitride with Visible-Light Illumination
Chen, Xi,Deng, Kejian,Zhou, Peng,Zhang, Zehui
, p. 2444 - 2452 (2018)
Photocatalytic selective oxidation has attracted considerable attention as an environmentally friendly strategy for organic transformations. Some methods have been reported for the photocatalytic oxidation of sulfides into sulfoxides in recent years. However, the practical application of these processes is undermined by several challenges, such as low selectivity, sluggish reaction rates, the requirement of UV-light irradiation, the use of additives, and the instability of the photocatalyst. Herein, a metal-free C60/graphitic carbon nitride (g-C3N4) composite photocatalyst was fabricated by a facile method, and well characterized by TEM, SEM, FTIR spectroscopy, XRD, X-ray photoelectron spectroscopy, diffuse reflectance spectroscopy, and photoluminescence spectroscopy. The C60/g-C3N4 catalyst exhibited a high photocatalytic activity at room temperature for the selective oxidation of sulfides into the corresponding sulfoxides in the presence of other functional groups, due to the synergetic roles of C60 and g-C3N4. Several important parameters have been screened, and this method afforded good to excellent yields of sulfoxides under optimal conditions. The superoxide radical (.O2?) and singlet oxygen (1O2) were identified as the oxidative species for the oxidation of sulfides into sulfoxides by exploring EPR experiments, and hence, a plausible mechanism for this oxidation was proposed. Moreover, the C60/g-C3N4 catalyst can be easily recovered by filtration and then reused at least four times without loss in activity.
DBDMH/NaNO2 catalyst: Transition-metal-free approach to highly efficient aerobic oxidation of sulfides to sulfoxides
Zhang, Hua,Chen, Chun-Yu,Liu, Ren-Hua,Xu, Qiang,Liu, Ji-Hong
, p. 4445 - 4451 (2008)
DBDMH/NaNO2/O2 in water is a very efficient nonmetal transition system for catalytic oxidation of a variety of sulfides to the corresponding sulfoxides. The present catalytic system utilizes cheap and readily available agents as the catalysts and has the
HIPE Polymerization Materials Functionalized with Iodic-BODIPY on the Surface as Porous Heterogeneous Visible-Light Photocatalysts
Li, Wenliang,Li, Leijiao,Cui, Guihua,Bai, Yu,Xiao, Xiao,Li, Yuxin,Yan, Lesan
, p. 392 - 396 (2017)
A high internal phase emulsion polymerization (PolyHIPE) material, with iodine-functionalized boron-dipyrromethene (iodic-BODIPY) immobilized on its surface, composes a porous heterogeneous organic photocatalyst (iodic-BODIPY-PolyHIPE). It shows high catalytic efficiency on the selective oxidation reaction of aromatic sulfides under visible light. The substrates were almost fully converted to their corresponding sulfoxides and no sulfones were observed. Most importantly, iodic-BODIPY-PolyHIPE shows >1.6-fold reaction rate compared to the previous non-inorganic heterogeneous photocatalysts.
Metal-free highly efficient aerobic oxidation of sulfides to sulfoxides catalyzed by DBDMH/TBN/H2O
Zhang, Hua,Chen, Chunyu,Liu, Renhua
, p. 811 - 819 (2012)
A highly efficient metal-free catalytic system, 1,3-dibromo-5,5- dimethylhydantoin (DBDMH)-tert-butylnitrite (TBN)-H2O, has been developed for an environmentally friendly and economical aerobic acid-free oxidation of sulfides. TBN was identifie
Ligand Modification of Au25 Nanoclusters for Near-Infrared Photocatalytic Oxidative Functionalization
Cai, Baogui,Kang, Xi,Li, Yangfeng,Pei, Yong,Tang, Li,Wang, Shuxin,Xiong, Lin,Xuan, Jun,Yin, Zhengmao,Zhu, Manzhou
supporting information, p. 3787 - 3792 (2022/03/15)
The inorganic-organic interface between metal catalysts and their substrates greatly influences reaction processes, but few studies of this interface have been conducted for a detailed understanding of its structure. Herein, we describe the synthesis and structural determination of an arylthiolated Au25(F-Ph)18- nanocluster and characterize in detail the key roles of its ligands in photocatalyzed oxidative functionalization reactions. The most significant findings are that (i) interactions are established between ligands to avoid distortion of the geometric structure, limit the Jahn-Teller effect, and protect the nanocluster from oxidization and (ii) the low energy gap (HOMO-LUMO) of the synthetic clusters enables three types of photocatalytic oxidative functionalization reactions by near-infrared light (850 nm).
Two enantiocomplementary Baeyer-Villiger monooxygenases newly identified for asymmetric oxyfunctionalization of thioether
Liu, Yafei,Ni, Ye,Wei, Shiyu,Xu, Guochao,Zhou, Jieyu
, (2021/08/19)
Two enantiocomplementary Baeyer-Villiger monooxygenases RaBVMO and AmBVMO were identified by genome mining for the asymmetric sulfoxidation. Both recombinant BVMOs have optimal pH of 9.0 and temperature of 35 °C. The half-lives of RaBVMO and AmBVMO at 30 °C were 24.4 and 24.6 h. RaBVMO and AmBVMO exhibited broad substrate spectrum and could catalyze the oxidization of various compounds including fatty ketones, cyclic ketones, and thioethers. Kinetic parameters analysis revealed that both RaBVMO and AmBVMO displayed higher catalytic efficiency toward thioanisole than cyclohexanone. As much as 50 mM thioanisole could be completely oxidized by AmBVMO and RaBVMO with 99% (R) and 95% (S), respectively. Molecular docking analysis further provides evidence for the complementary enantioselectivity of RaBVMO and AmBVMO. Our results demonstrate the potential application of the two novel BVMOs in asymmetric synthesis of sulfoxides.