1
|
Stamou C, Lada ZG, Chasapis CT, Papaioannou D, Dechambenoit P, Perlepes SP. Indium(III)/2-benzoylpyridine chemistry: interesting indium(III) bromide-assisted transformations of the ligand. Dalton Trans 2022; 51:15771-15782. [PMID: 36178466 DOI: 10.1039/d2dt02851d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of 2-benzoylpyridine, (py)(ph)CO, with InX3 (X = Cl, Br) in EtOH at room temperature have been studied. The InCl3/(py)(ph)CO system has provided access to complex [InCl3{(py)(ph)CO}(EtOH)]·{(py)(ph)CO} (1) and the byproduct {(pyH)(ph)CO}Cl (2). The reaction of InBr3 with (py)(ph)CO has led to a mixture of (L)[InBr4{(py)(ph)CO}] (3) and [In2Br4{(py)(ph)CH(O)}2(EtOH)2] (4), where L+ is the 9-oxo-indolo[1,2-a]pyridinium cation and (py)(ph)CH(O)- is the anion of (pyridin-2-yl)methanol. Based on solubility and crystallisation time differences between the two components of the mixture, complex 4 was isolated in pure form, i.e. free from 3. The formations of the counterion L+ and the coordinated (py)(ph)CH(O)- anion represent clearly InBr3-promoted/assisted transformations. Reaction mechanisms have been proposed for the formation of 2, 3 and 4. Complex 4 could also be isolated by the reaction of InBr3 and pre-formed (py)(ph)CH(OH) in EtOH. The solid-state structures of 1, 3 and 4 were determined by single-crystal X-ray crystallography, while the identity of the salt 2 was confirmed by microanalyses and a variety of spectroscopic techniques, including ESI-MS spectra. In the indium(III) complexes, the metal ions are 6-coordinate with a distorted octahedral geometry. The halogeno groups (Cl-, Br-) in the three complexes are terminal. The (py)(ph)CO molecule behaves as a N,O-bidentate (1.11) ligand in 1 and 3. A terminal EtOH ligand completes the coordination sphere of InIII in 1. The alkoxo oxygen atoms of the two 2.21 (py)(ph)CH(O)- ligands doubly bridge the InIII centers in 4 creating a {InIII2(μ-OR)2}4+ core; a nitrogen atom of one reduced organic ligand, two bromo ions and one terminal EtOH molecule complete the 6-coordination at each metal centre. Complexes 1, 3 and 4 were characterised by IR and Raman spectroscopies, and the data were discussed in terms of their known solid-state structures. Molar conductivity data and 1H NMR spectra were used in an attempt to probe the behaviour of the complexes in DMSO. The to-date observed metal ion-assisted/promoted transformations of (py)(ph)CO are also discussed.
Collapse
Affiliation(s)
- Christina Stamou
- Department of Chemistry, University of Patras, 26504 Patras, Greece.
| | - Zoi G Lada
- Institute of Chemical Engineering Sciences (ICE-HT), Foundation for Research and Technology-Hellas (FORTH), P.O. Box 1414, Platani, 26504 Patras, Greece
| | - Christos T Chasapis
- NMR Facility, Instrumental Analysis Laboratory, School of Natural Sciences, University of Patras, 26504 Patras, Greece
| | | | - Pierre Dechambenoit
- Centre de Recherche Paul Pascal, UMR 5031, CNRS, University of Bordeaux, 33600 Pessac, France.
| | - Spyros P Perlepes
- Department of Chemistry, University of Patras, 26504 Patras, Greece. .,Institute of Chemical Engineering Sciences (ICE-HT), Foundation for Research and Technology-Hellas (FORTH), P.O. Box 1414, Platani, 26504 Patras, Greece
| |
Collapse
|
2
|
Gao T, Meng L, Zeng G, Hao Z, Han Z, Feng Q, Lin J. Copper(II) complexes supported by 8-hydroxyquinoline-imine ligands: Synthesis, characterization and catalysis in aerobic alcohols oxidation. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
3
|
Dong Q, Ma Z, Hao Z, Han Z, Lin J, Lu G. Preparation of trinuclear ruthenium clusters based on piconol ligands and their application in Oppenauer‐type oxidation of secondary alcohols. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Qing Dong
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Zongwen Ma
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Zhiqiang Hao
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Zhangang Han
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Jin Lin
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science Hebei Normal University Shijiazhuang China
| | - Guo‐Liang Lu
- Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences The University of Auckland Auckland New Zealand
| |
Collapse
|
4
|
Wang M, Xu Z, Shi Y, Cai F, Qiu J, Yang G, Hua Z, Chen T. TEMPO-Functionalized Nanoreactors from Bottlebrush Copolymers for the Selective Oxidation of Alcohols in Water. J Org Chem 2021; 86:8027-8035. [PMID: 34105963 DOI: 10.1021/acs.joc.1c00410] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Polymeric nanoreactors in water fabricated by the self-assembly of amphiphilic copolymers have attracted much attention due to their good catalytic performance without using organic solvents. However, the disassembly and instability of relevant nanostructures often compromise their potential applicability. Herein, the preparation of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-containing nanoreactors by the self-assembly of amphiphilic bottlebrush copolymers has been demonstrated. First, a macromonomer having a norbornenyl polymerizable group was prepared by RAFT polymerization of hydrophobic and hydrophilic monomers. The macromonomer was further subjected to ring-opening metathesis polymerization to produce an amphiphilic bottlebrush copolymer. Further, TEMPO, as a catalyst, was introduced into the hydrophobic block through the activated ester strategy. Finally, TEMPO-functionalized polymeric nanoreactors were successfully obtained by self-assembly in water. The nanoreactors exhibited excellent catalytic activities in selective oxidation of alcohols in water. More importantly, the reaction kinetics showed that the turnover frequency is greatly increased compared to that of the similar nanoreactor prepared from liner copolymers under the same conditions. The outstanding catalytic activities of the nanoreactors from bottlebrush copolymers could be attributed to the more stable micellar structure using the substrate concentration effect. This work presents a new strategy to fabricate stable nanoreactors, paving the way for highly efficient organic reactions in aqueous solutions.
Collapse
Affiliation(s)
- Maolin Wang
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; Eco-Dyeing and Finishing Engineering Research Center, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zhenkai Xu
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; Eco-Dyeing and Finishing Engineering Research Center, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yi Shi
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; Eco-Dyeing and Finishing Engineering Research Center, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.,Zhejiang Cady Industry Co., Ltd., Industrial Garden Lianshi Town, Huzhou 313013, China
| | - Fang Cai
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; Eco-Dyeing and Finishing Engineering Research Center, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.,Zhejiang Cady Industry Co., Ltd., Industrial Garden Lianshi Town, Huzhou 313013, China
| | - Jiaqi Qiu
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; Eco-Dyeing and Finishing Engineering Research Center, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Guang Yang
- Biomass Molecular Engineering Center, Department of Materials Science and Engineering, Anhui Agricultural University, Hefei 230036, China
| | - Zan Hua
- Biomass Molecular Engineering Center, Department of Materials Science and Engineering, Anhui Agricultural University, Hefei 230036, China
| | - Tao Chen
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; Eco-Dyeing and Finishing Engineering Research Center, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| |
Collapse
|
5
|
Syntheses and crystal structures of new mononuclear and binuclear ruthenium complexes supported by salicylaldimine ligands. TRANSIT METAL CHEM 2021. [DOI: 10.1007/s11243-021-00459-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
6
|
Trinuclear ruthenium carbonyl complexes with salicylaldimine ligands as efficient catalysts for the oxidation of secondary alcohols. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2020.121647] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
7
|
Kumar R, Singh VV, Jain N, Singh AK. Fast Transfer Hydrogenation(TH) in Aerobic Condition and Oxidation of Alcohols with
N
‐Methylmorpholine‐
N
‐oxide Catalyzed by Ru(II) Ligated with Chalcogenated Pyridines and PPh
3. ChemistrySelect 2020. [DOI: 10.1002/slct.202002031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rajan Kumar
- Department of ChemistryIndian Institute of Technology Delhi New Delhi 110016 India
| | - Ved Vati Singh
- Department of ChemistryIndian Institute of Technology Delhi New Delhi 110016 India
| | - Nidhi Jain
- Department of ChemistryIndian Institute of Technology Delhi New Delhi 110016 India
| | - Ajai K. Singh
- Department of ChemistryIndian Institute of Technology Delhi New Delhi 110016 India
| |
Collapse
|
8
|
Liu X, Yu H, Xue C, Zhou X, Ji H. Cyclohexene Promoted Efficient Biomimetic Oxidation of Alcohols to Carbonyl Compounds Catalyzed by Manganese Porphyrin under Mild Conditions. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.201900426] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Xiao‐Hui Liu
- School of Chemical Engineering and Technology, Sun Yat‐sen University Zhuhai Guangdong 519082 China
| | - Hai‐Yang Yu
- School of Chemical Engineering and Technology, Sun Yat‐sen University Zhuhai Guangdong 519082 China
| | - Can Xue
- School of Chemical Engineering and Technology, Sun Yat‐sen University Zhuhai Guangdong 519082 China
| | - Xian‐Tai Zhou
- School of Chemical Engineering and Technology, Sun Yat‐sen University Zhuhai Guangdong 519082 China
| | - Hong‐Bing Ji
- Fine Chemical Industry Research Institute, Key Laboratory of Low‐Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat‐sen University Guangzhou Guangdong 510275 China
- School of Chemical Engineering, Guangdong University of Petrochemical Technology Maoming Guangdong 525000 China
| |
Collapse
|
9
|
Syntheses and crystal structures of ruthenium carbonyl complexes containing pyridine-alkoxide ligands. TRANSIT METAL CHEM 2019. [DOI: 10.1007/s11243-019-00360-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
10
|
Sinha C. Azoimine Chelated Ruthenium(II)- and Osmium(II)-Carbonyl Complex Catalyzed Alcohol Oxidation Reaction. CURRENT ORGANOCATALYSIS 2019. [DOI: 10.2174/2213337206666190311130604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Arylazoimidazole brings azoimine (-N=N-C=N-) chelating N(azo), N(imine) (abbreviated
- N, N/) centres and forms Ru(II) and Os(II) carbonyl complexes. These complexes act as catalysts
for the oxidation of alcohols to aldehydes/ketones by tertiary butyl hydro peroxide (ButOOH), hydrogen
peroxide (H2O2) and N-methylmorpholine-N-oxide (NMO) as oxygen sources. Different substituted
arylazoimidazoles such as 1-alkyl-2-(arylazo)imidazoles (RaaiR/), 1-alkyl-2-(naphthyl-α/β-
azo)imidazoles (α/β-NaiR) and (1-alkyl-2-{(o-thioalkyl)phenylazo}imidazole, SRaaiNR/) are used to
prepare Ru/Os-CO complexes. Ancillary ligands like hydride (H-), chloride (Cl-), triphenylphosphine
(PPh3) are used to monitor the catalytic efficiency of the complexes. Aromatic and aliphatic alcohols
like benzyl alcohol, 2-butanol, cyclopentanol, cyclohexanol, 1-phenylethanol, cinnamyl alcohol, diphenylmethanol,
are oxidized to the corresponding benzaldehyde, 2-butanone, cyclopentanone, cyclohexanone,
phenylacetone, cinamaldehyde, cyclopentanone, benzophenone, respectively. Different
physicochemical analyses (FT-IR, UV-Vis, Mass, NMR) suggest that the complexes react with an
oxidant to yield high valent ruthenium/osmium-oxo species (RuIV=O; OsIV=O), which is capable of
transferring the oxygen atom to alcohols. GC analysis accounts that percentage conversion order is as
follows : Cinnamyl alcohol > Cyclohexanol ~ 1-Phenylethanol > Diphenylmethanol > Cyclopentanol
> 2-Butanol > Benzyl alcohol. The oxidation efficiency of the oxidant follows the order : NMO >
ButOOH > H2O2. RuII complexes are more potent catalysts than OsII complexes. Out of three series
of RuII complexes, [RuCl(CO)(SMeaaiNEt)]ClO4 and [RuCl(CO)(SEtaaiNMe)]ClO4 showed highest
catalytic efficiency amongst 32 catalysts.
Collapse
|
11
|
Yan X, Yue X, Liu K, Hao Z, Han Z, Lin J. Synthesis and Structures of Ruthenium Carbonyl Complexes Bearing Pyridine-Alkoxide Ligands and Their Catalytic Activity in Alcohol Oxidation. Front Chem 2019; 7:394. [PMID: 31214574 PMCID: PMC6558070 DOI: 10.3389/fchem.2019.00394] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/16/2019] [Indexed: 02/05/2023] Open
Abstract
Reaction of Ru3(CO)12 with two equiv of 6-bromopyridine alcohols 6-bromopyCHROH [(R = C6H5 (L1); R = 4-CH3C6H4 (L2); R = 4-OMeC6H4 (L3); R = 4-ClC6H4 (L4); (R = 4-CF3C6H4 (L5); R = 2-OMeC6H4 (L6); R = 2-CF3C6H4 (L7)] and 6-bromopyC(Me)2OH (L8) in refluxing xylene afforded novel trinuclear ruthenium complexes [6-bromopyCHRO]2Ru3(CO)8 (1a-1g) and [6-bromopyC(Me)2O]2Ru3(CO)8 (1h). These complexes were characterized by FT-IR and NMR spectroscopy as well as elemental analysis. The structures of all the complexes were further confirmed by X-ray crystallographic analysis. In the presence of tert-butyl hydroperoxide (TBHP) as the source of oxidant, complexes 1a-1h displayed high catalytic activities for oxidation of primary and secondary alcohols and most of oxidation reactions could be completed within 1 h at room temperature.
Collapse
Affiliation(s)
- Xinlong Yan
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Xiaohui Yue
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Kang Liu
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Zhiqiang Hao
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Zhangang Han
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| | - Jin Lin
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
| |
Collapse
|
12
|
Ruthenium carbonyl complexes bearing bidentate pyridine-alkoxide ligands: Synthesis, crystal structures and reactivity. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
13
|
Zong S, Liu K, Yue X, Hao Z, Ma Z, Han Z, Lu GL, Lin J. Ruthenium carbonyl complexes supported by pyridine-alkoxide ligands: synthesis, structure and catalytic oxidation of secondary alcohols. NEW J CHEM 2019. [DOI: 10.1039/c9nj03222c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Five novel trinuclear ruthenium carbonyl complexes were synthesized and their application in oxidation of secondary alcohols was also researched.
Collapse
Affiliation(s)
- Siqi Zong
- National Demonstration Center for Experimental Chemistry Education
- Hebei Key Laboratory of Organic Functional Molecules
- College of Chemistry & Material Science
- Hebei Normal University
- Shijiazhuang 050024
| | - Kang Liu
- National Demonstration Center for Experimental Chemistry Education
- Hebei Key Laboratory of Organic Functional Molecules
- College of Chemistry & Material Science
- Hebei Normal University
- Shijiazhuang 050024
| | - Xiaohui Yue
- National Demonstration Center for Experimental Chemistry Education
- Hebei Key Laboratory of Organic Functional Molecules
- College of Chemistry & Material Science
- Hebei Normal University
- Shijiazhuang 050024
| | - Zhiqiang Hao
- National Demonstration Center for Experimental Chemistry Education
- Hebei Key Laboratory of Organic Functional Molecules
- College of Chemistry & Material Science
- Hebei Normal University
- Shijiazhuang 050024
| | - Zhihong Ma
- School of Pharmacy
- Hebei Medical University
- Shijiazhuang 050017
- China
| | - Zhangang Han
- National Demonstration Center for Experimental Chemistry Education
- Hebei Key Laboratory of Organic Functional Molecules
- College of Chemistry & Material Science
- Hebei Normal University
- Shijiazhuang 050024
| | - Guo-Liang Lu
- Auckland Cancer Society Research Centre
- Faculty of Medical and Health Sciences
- The University of Auckland
- Auckland 1142
- New Zealand
| | - Jin Lin
- National Demonstration Center for Experimental Chemistry Education
- Hebei Key Laboratory of Organic Functional Molecules
- College of Chemistry & Material Science
- Hebei Normal University
- Shijiazhuang 050024
| |
Collapse
|
14
|
Synthesis, characterization and catalytic activities of rhenium carbonyl complexes bearing pyridine-alkoxide ligands. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.06.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
15
|
Hao Z, Yan X, Liu K, Yue X, Han Z, Lin J. Ruthenium carbonyl complexes with pyridine-alkoxide ligands: synthesis, characterization and catalytic application in dehydrogenative oxidation of alcohols. NEW J CHEM 2018. [DOI: 10.1039/c8nj03706j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dehydrogenative oxidation of secondary alcohols catalyzed by several new trinuclear ruthenium carbonyl complexes under mild conditions was proposed.
Collapse
Affiliation(s)
- Zhiqiang Hao
- National Demonstration Center for Experimental Chemistry Education
- The College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- People's Republic of China
| | - Xinlong Yan
- National Demonstration Center for Experimental Chemistry Education
- The College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- People's Republic of China
| | - Kang Liu
- National Demonstration Center for Experimental Chemistry Education
- The College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- People's Republic of China
| | - Xiaohui Yue
- National Demonstration Center for Experimental Chemistry Education
- The College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- People's Republic of China
| | - Zhangang Han
- National Demonstration Center for Experimental Chemistry Education
- The College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- People's Republic of China
| | - Jin Lin
- National Demonstration Center for Experimental Chemistry Education
- The College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- People's Republic of China
| |
Collapse
|
16
|
Boruah JJ, Das SP. Solventless, selective and catalytic oxidation of primary, secondary and benzylic alcohols by a Merrifield resin supported molybdenum(vi) complex with H2O2 as an oxidant. RSC Adv 2018; 8:34491-34504. [PMID: 35548632 PMCID: PMC9086892 DOI: 10.1039/c8ra05969a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 09/26/2018] [Indexed: 12/03/2022] Open
Abstract
Here, we have described the synthesis, characterization and catalytic activity of a dioxo-molybdenum(vi) complex supported on functionalized Merrifield resin (MR-SB-Mo). The functionalization of Merrifield resin (MR) was achieved in two-steps viz. carbonylation (MR-C) and Schiff base formation (MR-SB). The compounds, MR-C, MR-SB and MR-SB-Mo, were characterized at each step of the synthesis by elemental, SEM, EDX, thermal, BET and different spectroscopic analysis. The catalyst, MR-SB-Mo, efficiently and selectively oxidized a wide variety of alcohols to aldehydes or ketones using 30% H2O2 as an oxidant with reasonably good TOF (660 h−1 in case of benzyl alcohol). The catalyst acted heterogeneously under solventless reaction conditions and did not lead to over oxidized products under optimized conditions. The catalyst afforded regeneration and can be reused for at least five reaction cycles without loss of efficiency and product selectivity. A reaction mechanism for the catalytic activity of MR-SB-Mo was proposed and a probable reactive intermediate species isolated. Synthesis of a Merrifield resin supported dioxomolybdenum(vi) complex. The compound was well characterized and it catalysed the oxidation of alcohols to aldehydes or ketones with high TOF.![]()
Collapse
Affiliation(s)
| | - Siva Prasad Das
- Department of Chemistry
- School of Science
- RK University
- Rajkot-360020
- India
| |
Collapse
|