1580-30-9Relevant academic research and scientific papers
Trisaminomethane–cobalt complex supported on Fe3O4 magnetic nanoparticles as an efficient recoverable nanocatalyst for oxidation of sulfides and C–S coupling reactions
Ashraf, Muhammad Aqeel,Liu, Zhenling,Peng, Wan-Xi
, (2020)
In this work, trisaminomethane–cobalt complex immobilized onto the surface of Fe3O4 magnetic nanoparticles was successfully prepared via a simple and inexpensive procedure. The prepared nanocatalyst was considered a robust and clean nanoreactor catalyst for the oxidation and synthesis of sulfides under green conditions. This ecofriendly heterogeneous catalyst was characterized by Fourier transform infrared spectroscopy, X-ray diffractometry, energy-dispersive X-ray spectroscopy, inductively coupled plasma-atomic emission spectroscopy, thermogravimetric analysis, vibrating sample magnetometry, X-ray mapping, scanning electron microscopy, and transmission electron microscopy techniques. Use of green medium, easy separation and workup, excellent reusability of the nanocatalyst, and short reaction time are some outstanding advantages of this method.
Zirconium oxide complex anchored on boehmite nanoparticles as highly reusable organometallic catalyst for C–S and C–O coupling reactions
Ghorbani-Choghamarani, Arash,Seydyosefi, Zeinab,Tahmasbi, Bahman
, (2018/07/31)
Boehmite nanoparticles were prepared by a simple and inexpensive procedure in water using commercially available materials without inert atmosphere. Then, the surface of the boehmite nanoparticles was modified using 3-mercaptopropyltrimethoxysilane and subsequently zirconium oxide was supported on the modified surface. Zirconium oxide supported on boehmite nanoparticles (Pr.S-ZrO@boehmite) was characterized using scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and inductively coupled plasma technique. The catalytic application of Pr.S-ZrO@boehmite was studied in C–O and C–S coupling reactions for synthesis of valuable compounds such as ether and sulfide derivatives. All products were obtained in good to excellent yields and the catalyst could be recovered and reused several times without significant loss of catalytic efficiency. Furthermore, zirconium oxide is rarely used as catalyst for cross-coupling reactions.
The first report on the preparation of peptide nanofibers decorated with zirconium oxide nanoparticles applied as versatile catalyst for the amination of aryl halides and synthesis of biaryl and symmetrical sulfides
Ghorbani-Choghamarani, Arash,Taherinia, Zahra
, p. 9414 - 9423 (2017/08/29)
We have reported the preparation of peptide nanofibers decorated with zirconium oxide nanoparticles for the first time as a novel, non-toxic, inexpensive and recyclable catalyst for the amination of aryl halides and synthesis of biaryl and symmetrical sulfides (via reaction of aryl halides with S8 or 2-thiobarbituric acid as sulfur transfer reagents). The structure of the catalyst was studied by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), atomic absorption spectroscopy (AAS), UV-visible absorption and fluorescence spectroscopy.
Synthesis of sulfides via reaction of aryl/alkyl halides with S8 as a sulfur-transfer reagent catalyzed by Fe3O4-magnetic-nanoparticles-supported L-Histidine-Ni(II)
Azadi, Gouhar,Taherinia, Zahra,Naghipour, Ali,Ghorbani-Choghamarani, Arash
, p. 303 - 313 (2017/05/04)
One-pot synthesis of symmetrical diaryl/alkyl sulfides in high yields from the reaction between aryl/alkyl halides and S8 can be carried out in a short period, using Fe3O4@SiO2@His@Ni(II) as a reusable catalyst. The present approach offers the advantages of a clean reaction, simple methodology and high efficiency, and avoids the use of a toxic catalyst.
Reaction of Simple Arenes with FSO3H*SbF5/SO2: One-Pot Synthesis of Aromatic Sulfoxides. Mechanistic Aspects and Synthetic Utility
Laali, Kenneth Khosrow,Nagvekar, Devdatt S.
, p. 1867 - 1874 (2007/10/02)
In a simple one-pot reaction, mono-, di-, tri-, and polyalkylbenzenes, isomeric alkylhalobenzenes, and fluoro-, (trifluoromethyl)-, and 1,3,5-trifluorobenzene were converted to their corresponding diaryl sulfoxides with FSO3H*SbF5 (1:1) (magic acid)/SO2.Dependency of the yields on the acidity (H0) and the arene structure was demonstrated.Reduction of the formed sulfoxide was also observed as a minor pathway to give diaryl sulfide.The reduction is superacid-catalyzed, and protonated sulfoxides are the key intermediates en route to sulfides.Protonation of several functionalized diaryl sulfoxides was also studied in magic acid/SO2 under stable ion conditions.Unlike the parent diphenyl sulfoxide, which is S-protonated, alkyl-, fluoro-, and trifluoromethyl-substituted diaryl sulfoxides O-protonate to give long-lived sulfoxonium ions.The proposed mechanism for the arene/superacid/SO2 system involves sulfination of the arenium ions, O-protonation of the resulting sulfinic acid, dehydration of the oxonium ion "ArSO+" and arylation.In the absence of SO2, the fluorosulfonation, ionization, arylation path becomes dominant.The scope of the reaction is sufficiently broad to be synthetically useful.The methodology is also applicable to unsymmetrical (mixed) diaryl sulfoxides.
Diphenyl ethers for tobacco sucker control
-
, (2008/06/13)
Diphenyl ethers having the formula STR1 WHERE Y and Z are halogen, alkyl, trifluoromethyl, alkoxy, hydroxy, nitro, cyano, carboxy, carbalkoxy, carbamoyl, or alkylthio, and m and n are 0, 1, 2, or 3, Are useful in controlling undesirable secondary growth in plants, particularly sucker growth in tobacco.
