Preparation of Functionalized α,β-Unsaturated Sulfonamides via Olefin Cross-Metathesis
作者:Łukasz Woźniak、Adam A. Rajkiewicz、Louis Monsigny、Anna Kajetanowicz、Karol Grela
DOI:10.1021/acs.orglett.0c01471
日期:2020.7.2
The synthesis of functionalized α,β-unsaturated sulfonamides by means of cross-metathesis of vinyl sulfonamides and olefins has been developed. The reaction proceeds smoothly in the presence of Hoveyda–Grubbs catalyst and its nitro analogue, providing a wide range of substituted products. The usefulness of this methodology has been proven in the preparation of new derivatives of biologically active
Efficient and selective hydrogen peroxide-mediated oxidation of sulfides in batch and segmented and continuous flow using a peroxometalate-based polymer immobilised ionic liquid phase catalyst
作者:S. Doherty、J. G. Knight、M. A. Carroll、J. R. Ellison、S. J. Hobson、S. Stevens、C. Hardacre、P. Goodrich
DOI:10.1039/c4gc01770f
日期:——
The peroxometalate-based polymer immobilized ionic liquid phase catalyst [PO4WO(O2)2}4]@PIILP has been prepared by anion exchange of ring opening metathesis-derived pyrrolidinium-decorated norbornene/cyclooctene copolymer and shown to be a remarkably efficient system for the selectiveoxidation of sulfides under mild conditions. A cartridge packed with a mixture of [PO4WO(O2)2}4]@PIILP and silica
efficient synthetic methodology towards the selective synthesis of sulfoxides and sulfones is reported using a cheap and green organocatalytic method. Starting from sulfides and using 2,2,2-trifluoroacetophenone as the organocatalyst and H2O2 as the oxidant, the high-yielding preparation of sulfoxides or sulfones is described, being dependent on the reaction conditions. A highly efficient synthetic methodology
摘要 据报道,一种廉价且绿色的有机催化方法可用于选择性合成亚砜和砜的高效合成方法。从硫化物开始,以2,2,2-三氟苯乙酮为有机催化剂,以H 2 O 2为氧化剂,描述了根据反应条件的高产亚砜或砜的制备方法。 据报道,一种廉价且绿色的有机催化方法可用于选择性合成亚砜和砜的高效合成方法。从硫化物开始,以2,2,2-三氟苯乙酮为有机催化剂,以H 2 O 2为氧化剂,描述了根据反应条件的高产亚砜或砜的制备方法。
Catalytic Conversion of Sulfides to Sulfoxides by The [PZnMo<sub>2</sub>W<sub>9</sub>O<sub>39</sub>]<sup>5−</sup>Polyoxometalate
作者:Bahram Yadollahi
DOI:10.1246/cl.2003.1066
日期:2003.11
Keggin type polyoxometalates can be used as catalysts for the activation of 30% aqueous hydrogen peroxide for the selective transformation of various organic substrates. In this paper, results are presented for the oxidation of sulfides to sulfoxides in high to excellent yields using 30% aqueous H2O2 as oxidant and [PZnMo2W9O39]5− as catalyst in acetonitrile.
Efficient and selective oxidation of sulfides in batch and continuous flow using styrene-based polymer immobilised ionic liquid phase supported peroxotungstates
作者:S. Doherty、J. G. Knight、M. A. Carroll、A. R. Clemmet、J. R. Ellison、T. Backhouse、N. Holmes、L. A. Thompson、R. A. Bourne
DOI:10.1039/c6ra11157b
日期:——
Styrene-based peroxotungstate-modified polymer immobilizedionicliquidphase catalysts [PO4WO(O2)2}4]@ImPIILP (Im = imidazolium) are remarkably efficient systems for the selective oxidation of sulfides under mild conditions both in batch and as a segmented or continuous flowprocess using ethanol as the solvent and mobile phase, respectively. The performance of these styrene-based systems has been