17530-83-5Relevant academic research and scientific papers
Synthesis and characterization of Manganese(III) tetraphenylporphyrinato chloride immobilized on multi-wall carbon nanotubes, and its application as an efficient and reusable catalyst in the biomimetic oxidation of sulfides: A comprehensive experimental and computational study
Khajehzadeh, Mostafa,Moghadam, Majid,Noorbakhsh, Pardis
, (2020)
In the present study, manganese(III) tetraphenylporphyrinato choloride, was immobilized on multiwall carbon nanotubes by covalent bonding. The structures of [Mn(TPP)Cl]&at;AP-MWC catalyst was confirmed by FT-IR, UV–vis spectroscopic techniques and scanning electron microscopy (SEM). Then, the ability of this novel heterogeneous catalyst was investigated in the oxidation of linear and cyclic sulfides under magnetic stirring conditions. Also, the DFT computational method (B3PW91 method with LanL2DZ basis set) was used for further analysis of this catalyst. Based on this method, the molecular geometries and frequencies of vibrations, chemical shifts, absorbed wavelengths, hyper-conjugative interactions, electron transitions between electron surfaces, positive and negative charges, HOMO and LUMO gap, wavelength (λ), chemical potential (μ), ionization energy (IE), global hardness (η), global softness (S), electrophilicity index (ω) and electronegativity (α) of the most intensity electronic transition for carbon nanotubes and [Mn(TPP)Cl]&at;AP-MWCNT catalyst were calculated. The activity and efficiency of this catalyst were then investigated in the biomimetic oxidation of sulfides. The [Mn(TPP)Cl]&at;AP-MWC heterogeneous catalyst showed the advantages such as high efficiency, good to excellent yield, short reaction times, easy separation and high reusability of the catalyst.
Metal-free oxidative coupling of alkyl chlorides with thiols: An efficient access to sulfoxides
Liu, Qian,Zhao, Xiaoqian,Xu, Feng,Li, Gaoqiang
supporting information, (2019/12/27)
An efficient and step-economical access to sulfoxides from thiols and alkyl halides in the presence of I2O5 and DBU via direct oxidative couplings is described here. It is the first case that combined Williamson sulfide synthesis and subsequent sulfide oxidation into one step manipulation for sulfoxides preparation. This protocol features wide substrate scope, mild and metal-free conditons, the use of naturally abundant starting materials and avoidance of over-oxidation.
Method of preparing sulfoxide compounds from benzyl chloride compound and thiophenol by one-step reaction in metal free condition
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Paragraph 0050; 0051; 0052; 0053, (2019/04/06)
The invention discloses a method of preparing sulfoxide compounds from benzyl chloride compound and thiophenol by a one-step reaction in a metal free condition. The method can be used for preparing aseries of sulfoxide compounds in a mild condition by taking benzyl chloride compound and thiophenol as reaction raw materials, iodine pentoxide as an oxidizing agent and 1,8-diazabicycloundecylenic-7-ene as alkali with a high yield. By taking halogenated hydrocarbon and thiol as reactants directly, compared with known and popular methods of generating thioether by halogenated hydrocarbon and thiolunder the action of strong alkali, separating a thioether compound and oxidizing the thioether to synthesize sulfoxide through an oxidizing agent, the reaction steps are shortened to one step from two steps. The middle treatment process of the reaction is few, the atom economy is good, and no transitional metal catalysts take part in the reaction, so that the synthetic cost is low, the reaction condition is mild, and the method opens up a novel and efficient path which is high in atom economy and low in cost for preparing the sulfoxide compounds and has a wide application prospect.
TiCl4 hiocarbonyls and oxidation of sulfides in the presence of H2O2
Bahrami, Kiumars,Khodaei, Mohammad M.,Shakibaian, Vida,Khaledian, Donya,Yousefi, Behrooz H.
experimental part, p. 155 - 163 (2012/06/01)
H2O2 in combination with TiCl4 proved to be a highly reactive reagent system for the desulfurization of thioamide and thioketone derivatives in excellent yields and short reaction times with high purity. Sulfides were also found to undergo oxidation to sulfones under similar reaction conditions. In most cases, these reactions are highly selective, simple, and clean, affording products in high yields and purity.
H2O2/Tf2O system: An efficient oxidizing reagent for selective oxidation of sulfanes
Khodaei, Mohammad Mehdi,Bahrami, Kiumars,Karimi, Ahmad
, p. 1682 - 1684 (2008/12/21)
A versatile procedure for the oxidation of sulfanes to sulfoxides without any overoxidation to sulfones has been reported. It is noteworthy that the reaction tolerates oxidatively sensitive functional groups and that the sulfur atom is selectively oxidize
