642075-97-6Relevant academic research and scientific papers
New oxovanadium and dioxomolybdenum complexes as catalysts for sulfoxidation: experimental and theoretical investigations of E and Z isomers of ONO tridentate Schiff base ligand
Kargar, Hadi,Moghimi, Atefeh,Fallah-Mehrjardi, Mehdi,Behjatmanesh-Ardakani, Reza,Rudbari, Hadi Amiri,Munawar, Khurram Shahzad
, p. 22 - 36 (2021/06/23)
A new ONO-tridentate Schiff base ligand (H2L) derived by the condensation of nicotinic hydrazide with 5-chlorosalicylaldehyde has been prepared and characterized by combustion analysis (CHN), FT-IR and multinuclear (1H and 13C) NMR spectroscopy. The crystalline nature and molecular structure of the ligand were confirmed by single-crystal X-ray diffraction analysis. Furthermore, the optimized structural parameters of the four possible configurations of the ligand including Z and E stereoisomers each containing two tautomeric forms (enol and keto) have also been investigated. The theoretical parameters were calculated by performing the DFT method using the B3LYP/Def2-TZVP level of theory. In addition to this, dioxomolybdenum(VI) (MoO2L) and oxovanadium(V) (VOL) complexes with the entitled Schiff base ligand have also been prepared and characterized by different techniques. Then, the catalytic efficiencies of synthesized VOL and MoO2L complexes were also explored for the oxidation of sulfides using 30% aqueous H2O2 as a source of oxygen. These homogeneous catalysts showed excellent catalytic activities in the oxidation of both aromatic and aliphatic sulfides.
Oxovanadium and dioxomolybdenum complexes: synthesis, crystal structure, spectroscopic characterization and applications as homogeneous catalysts in sulfoxidation
Kargar, Hadi,Kaka-Naeini, Azar,Fallah-Mehrjardi, Mehdi,Behjatmanesh-Ardakani, Reza,Amiri Rudbari, Hadi,Munawar, Khurram Shahzad
, p. 1563 - 1583 (2021/05/11)
New oxovanadium and dioxomolybdenum Schiff base complexes, [VO(L)(OCH3)] n and [MoO2(L)(CH3OH)], were synthesized by treating an ONO donor Schiff base (H2L) derived by condensation of 3-ethoxysalicylaldehyde and nicotinic hydrazide with oxo and dioxo acetylacetonate salts of vanadium and molybdenum (VO(acac)2 and MoO2(acac)2), respectively. The synthesized ligand and complexes were characterized by FTIR, multinuclear (1H, 13C) NMR, elemental and single crystal X-ray diffraction analysis. In both complexes, the geometry around the central metal ions was distorted octahedral as revealed by diffraction studies. Theoretical calculations of the synthesized compounds were carried out by DFT at B3LYP/Def2-TZVP level of theory, which showed good correlation with the experimental results. Moreover, the catalytic efficiency of both complexes was investigated by oxidizing aryl and alkyl sulfides in the presence of 30% H2O2 in ethanol.
A general and practical sulfonylation of benzylic ammonium salts with sulfonyl hydrazides for the synthesis of sulfones
Zhu, Haibo,Zhang, Yingying,Liu, Yishuai,Yang, Liu,Xie, Zongbo,Jiang, Guofang,Le, Zhang-Gao
supporting information, (2020/05/06)
A practical and efficient approach adopting transition-metal-free cross-coupling of sulfonyl hydrazides with benzyl ammonium salts has been developed to synthesize benzyl sulfones using Cs2CO3 as base under mild conditions. The protocol employs stable and easy to handle coupling partners, and is endowed with good substrate compatibility, leading to functional benzyl sulfones in good yields.
Efficient synthesis of aliphatic sulfones by Mg mediated coupling reactions of sulfonyl chlorides and aliphatic halides
Fu, Ying,Xu, Qin-Shan,Li, Quan-Zhou,Du, Zhengyin,Wang, Ke-Hu,Huang, Danfeng,Hu, Yulai
, p. 2841 - 2845 (2017/04/03)
Sulfonyl chlorides were reduced to anhydrous sulfinate salts with magnesium under sonication. These sulfinates were alkylated to sulfones with alkyl chlorides in the presence of catalytic sodium iodide under sonication. A variety of aliphatic sulfones was efficiently prepared by this one-pot two-step procedure.
Ruthenium(II) porphyrin catalyzed cyclopropanation of alkenes with tosylhydrazones
Zhang, Jun-Long,Hong Chan, Philip Wai,Che, Chi-Ming
, p. 8733 - 8737 (2007/10/03)
The diastereoselective ruthenium(II) porphyrin catalyzed cyclopropanation of a variety of alkenes with aryl diazomethanes generated in situ from stable tosylhydrazone derivatives, was achieved in good to excellent yields (up to 92%) and product turnovers.
