摘要制备了一种由1,3-二氰基苯衍生的新型双(恶唑啉)配体,并将其作为配体用于制备新的双核钼烯基配合物。通过UV-Vis,质量,1 H NMR和FT-IR光谱法,热和元素分析以及X射线衍射对这种配体进行了表征。通过该配体与MoO 2(acac)2的反应制备钼配合物。还通过FT-IR,UV-Vis和ICP光谱,元素分析和热分析对催化剂进行了表征。在TBHP存在下,该催化体系可有效地用于烯烃和硫化物的氧化。在氧化反应中还研究了不同溶剂和供氧体的影响。
(PhCH<sub>2</sub>PPh<sub>3</sub>)<sup>+</sup>Br<sub>3</sub> <sup>−</sup>: A Versatile Reagent for the Chemoselective Oxidation of Sulfides to Sulfoxides
作者:F. Shirini、G. H. Imanzadeh、A. R. Mousazadeh、A. R. Aliakbar
DOI:10.1080/10426500903176539
日期:2010.7.30
Benzyltriphenylphosphonium tribromide (BTPTB), as a stable solid reagent, is easily prepared by the reaction of benzyltriphenylphosphonium bromide with Br2. This reagent can be used as an efficient reagent for the chemoselective oxidation of dialkyl and aryl-alkyl sulfides to their corresponding sulfoxides in the presence of diaryl sulfides and primary alcohols. All reactions were performed in a refluxing
Abstract A novel bis (oxazoline) ligand derived from 1,3-dicyanobenzene was prepared and applied as a ligand for the preparation of a new binuclear molybdenyl complex. This ligand was characterized by UV–Vis, mass, 1 H NMR, and FT-IR spectroscopic methods, thermal and elemental analysis and X-ray diffraction. The molybdenum complex was prepared by the reaction of this ligand with MoO 2 (acac) 2 . The
摘要制备了一种由1,3-二氰基苯衍生的新型双(恶唑啉)配体,并将其作为配体用于制备新的双核钼烯基配合物。通过UV-Vis,质量,1 H NMR和FT-IR光谱法,热和元素分析以及X射线衍射对这种配体进行了表征。通过该配体与MoO 2(acac)2的反应制备钼配合物。还通过FT-IR,UV-Vis和ICP光谱,元素分析和热分析对催化剂进行了表征。在TBHP存在下,该催化体系可有效地用于烯烃和硫化物的氧化。在氧化反应中还研究了不同溶剂和供氧体的影响。
Epoxidation of alkenes and oxidation of sulfides catalyzed by a new binuclear vanadium bis-oxazoline complex
Bis(oxazoline) ligand, [2,2′-(1,3-phenylene)bis(oxazole-4,2-diyl)]-dimethanol, derived from dicyanobenzene was applied as ligand for complexation with vanadium. The catalyst was characterized by FT-IR, UV–Vis, 1H NMR spectroscopic methods, CHNS, ICP and thermal analyses, and magnetic susceptibility. The catalytic activity of this complex was then studied in the epoxidation of alkenes with TBHP (tert-butyl
衍生自二氰基苯的双(恶唑啉)配体[2,2'-(1,3-亚苯基)双(恶唑-4,2-二基)]-二甲醇用作与钒络合的配体。通过FT-IR,UV-Vis,1 H NMR光谱法,CHNS,ICP和热分析以及磁化率对催化剂进行了表征。然后在乙腈中用TBHP(氢过氧化叔丁基)对烯烃进行环氧化研究了该络合物的催化活性。在环辛烯的环氧化中研究了反应参数如溶剂种类和给氧体的影响。还研究了该催化剂在H 2 O 2氧化硫化物中的催化活性。 乙醇中生成相应的亚砜和砜。
Lewis acid-assisted Ir(<scp>iii</scp>) reductive elimination enables construction of seven-membered-ring sulfoxides
作者:Wu Yang、Yingzi Li、Jiefeng Zhu、Wentan Liu、Jie Ke、Chuan He
DOI:10.1039/d0sc04180g
日期:——
bond formation appears to have fallen off significantly. The main problem lies in the reductive elimination step, as iridium has a tendency to form stable and catalytically inactive Ir(III) species. Herein, with a rationally designed Lewisacid assisted oxidatively induced strategy, the sluggish Ir(III) reductive elimination is successfully facilitated, enabling the facile C–C bond formation. The X-ray