氧二过氧钼配合物[MoO(O 2)2 @ En / MIL-100(Cr)]的开放金属位点Cr-MOF的纳米结构作为选择性硫醚氧化的有前途和双功能催化剂
摘要:
在这项工作中,MIL-100(Cr)的开放金属现场金属有机骨架被选作钼络合物多步接枝的载体。将氧二过氧钼配合物配位到乙二胺修饰的MIL-100(Cr)孔笼上,证明该双功能MoO(O 2)2 @ En / MIL-100(Cr)催化剂已成功用于H 2 O 2(30 %)介导绿色和选择性的硫醚氧化过程。MoO(O 2)2 @ En / MIL-100(Cr)催化剂的组分活性和可回收性测试显示成功运行了8次。
Metal-free oxidative coupling of alkyl chlorides with thiols: An efficient access to sulfoxides
作者:Qian Liu、Xiaoqian Zhao、Feng Xu、Gaoqiang Li
DOI:10.1016/j.tetlet.2019.151492
日期:2020.2
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
本文描述了在I 2 O 5和DBU存在下,通过直接氧化偶合从硫醇和烷基卤化物高效,经济地获取亚砜的方法。这是第一种将威廉姆森硫化物合成和随后的硫化物氧化结合起来一步一步进行亚砜制备的情况。该协议具有广泛的底物范围,温和无金属的条件,使用天然丰富的起始原料以及避免过度氧化的特点。
Nondirected Copper-Catalyzed Sulfoxidations of Benzylic C–H Bonds
作者:Hao Yu、Zhen Li、Carsten Bolm
DOI:10.1021/acs.orglett.8b00615
日期:2018.4.6
A copper-catalyzed sulfoxidation of benzylic C–H bonds by nondirected oxidative C(sp3)-H activation was developed. The process proceeds via sulfenate anions, which are generated by base-triggered elimination of β-sulfinyl esters and benzyl radicals. The functional group tolerance is high, and the product yields are good.
Novel dioxomolybdenum complexes containing ONO-tridentate Schiff base ligands derived from 4-aminobenzohydrazide: synthesis, spectral characterization, and application as efficient homogeneous catalysts for selective sulfoxidation
作者:Hadi Kargar、Mehdi Fallah-Mehrjardi
DOI:10.1007/s13738-021-02282-0
日期:2021.12
Novel dioxomolybdenum Schiff base complexes, [MoO2(Ln)(CH3OH)], were synthesized by the reaction of MoO2(acac)2 and ONO donor Schiff base ligands (H2Ln) derived by the condensation of 4-aminobenzohydrazide and substituted salicylaldehydes. The synthesized ligands and their complexes were characterized by various spectroscopic techniques like FT-IR, 1H NMR, 13C NMR, and elemental analysis (CHN). The
新型二氧钼席夫碱配合物 [MoO 2 (L n )(CH 3 OH)] 是通过 MoO 2 (acac) 2和 ONO 供体席夫碱配体 (H 2 L n )的反应合成的,该配体由 4 -氨基苯甲酰肼和取代的水杨醛。合成的配体及其配合物通过各种光谱技术如 FT-IR、1 H NMR、13C NMR和元素分析(CHN)。复合物中中心金属原子周围的几何形状被认为是扭曲的八面体。此外,通过在叔丁基氢过氧化物存在下在回流条件下在 1,2-二氯乙烷中氧化芳基和烷基硫化物来研究配合物的催化效率。该方法具有收率高、反应时间短、选择性好等优点,可生成相应的亚砜而不会过度氧化成砜。
Synthesis, spectral characterization, crystal structure and catalytic activity of a novel dioxomolybdenum Schiff base complex containing 4-aminobenzhydrazone ligand: A combined experimental and theoretical study
A novel dioxomolybdenum Schiff base complex, [MoO2(L)(H2O)], was synthesized by the reaction of MoO2(acac)2 and an ONO donor Schiff base ligand (H2L: (E)-4-amino-N'-(3-ethoxy-2-hydroxybenzylidene)benzohydrazide) derived by the condensation of 4-aminobenzohydrazide and 3-ethoxysalicylaldehyde. The synthesized ligand and complex were characterized by various spectroscopic techniques like FT-IR, 1H NMR
一种新颖的二氧合钼席夫碱配合物,[的MoO 2(L)(H 2 O)],通过的MoO的反应合成2(ACAC)2和供体ONO席夫碱配体(ħ 2 L: (E) -4-氨基-N' -(3-乙氧基-2-羟基苯甲酰肼)由4-氨基苯甲酰肼和3-乙氧基水杨醛缩合而成。合成的配体和配合物通过各种光谱技术如 FT-IR、1 H NMR、13C NMR和元素分析(CHN)。通过单晶X射线衍射分析(SC-XRD)证实了配合物的结构。从衍射研究中收集的数据表明,复合物中中心金属离子周围的几何形状是扭曲的八面体。合成化合物的理论计算,通过 DFT 使用 B3LYP 和 PBE0 理论水平在 Def2-TZVP 基组上进行,表明计算结果与实验结果一致。此外,通过在乙醇中的 30% H 2 O 2水溶液存在下氧化芳基和烷基硫化物来研究配合物的催化效率。