51
|
Zhang X, Sun J, Ding Y, Yu L. Dehydration of Aldoximes Using PhSe(O)OH as the Pre-Catalyst in Air. Org Lett 2015; 17:5840-2. [PMID: 26574922 DOI: 10.1021/acs.orglett.5b03011] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
PhSe(O)OH was found to be a good pre-catalyst for aldoxime dehydrations in open air. Compared with the previously reported (PhSe)(2)-H(2)O(2) system, it is more stable and milder, affording broader application scopes due to a higher functional group tolerance. The control experiments for mechanism study disclosed that air was the key factor for the reaction to maintain enough concentration of PhSeOH, which should be the real catalytic species.
Collapse
Affiliation(s)
- Xu Zhang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Jiangsu Key Laboratory of Zoonosis, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China
| | - Jingjing Sun
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Jiangsu Key Laboratory of Zoonosis, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China
| | - Yuanhua Ding
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Jiangsu Key Laboratory of Zoonosis, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China
| | - Lei Yu
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Jiangsu Key Laboratory of Zoonosis, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China
| |
Collapse
|
52
|
Bradley TD, Dragan A, Tomkinson NC. Baeyer–Villiger oxidation under Payne epoxidation conditions. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
53
|
Yu L, Luan J, Xu L, Ding Y, Xu Q. Proline and secondary amine co-catalyzed condensation of cyclobutanone with aldehydes: a facile access to 2-methylenecyclobutanones under near neutral conditions. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
54
|
Yu L, Huang Y, Wei Z, Ding Y, Su C, Xu Q. Heck Reactions Catalyzed by Ultrasmall and Uniform Pd Nanoparticles Supported on Polyaniline. J Org Chem 2015; 80:8677-83. [PMID: 26274575 DOI: 10.1021/acs.joc.5b01358] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using air as the oxidant instead of the traditionally employed persulfates, the smaller and more uniform Pd nanoparticles (around 2 nm) supported on polyaniline (Pd@PANI) can be easily fabricated by the oxidation-polymerization of aniline with PdCl2. This material is an efficient and environmentally friendly catalyst for Heck reactions due to its recyclability, low loading, and ligand-free and mild reaction conditions. It was even tolerant to sulfur-containing substrates. This work reports the Pd@PANI-catalyzed Heck reactions with very wide substrate scopes, and discloses the catalytic mechanisms based on experimental findings and results of catalyst analysis and characterization.
Collapse
Affiliation(s)
- Lei Yu
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China.,Zhejiang Key Laboratory of Carbon Materials, College of Chemistry and Materials Engineering, Wenzhou University , Wenzhou, Zhejiang 325035, China
| | - Yaping Huang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China.,Zhejiang Key Laboratory of Carbon Materials, College of Chemistry and Materials Engineering, Wenzhou University , Wenzhou, Zhejiang 325035, China
| | - Zheng Wei
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China.,SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University , Shenzhen 518060, China
| | - Yuanhua Ding
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China
| | - Chenliang Su
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University , Shenzhen 518060, China
| | - Qing Xu
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu 225002, China.,Zhejiang Key Laboratory of Carbon Materials, College of Chemistry and Materials Engineering, Wenzhou University , Wenzhou, Zhejiang 325035, China
| |
Collapse
|
55
|
Developments in Synthetic Application of Selenium(IV) Oxide and Organoselenium Compounds as Oxygen Donors and Oxygen-Transfer Agents. Molecules 2015; 20:10205-43. [PMID: 26046320 PMCID: PMC6272618 DOI: 10.3390/molecules200610205] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/23/2015] [Accepted: 06/01/2015] [Indexed: 11/16/2022] Open
Abstract
A variety of selenium compounds were proven to be useful reagents and catalysts for organic synthesis over the past several decades. The most interesting aspect, which emerged in recent years, concerns application of hydroperoxide/selenium(IV) oxide and hydroperoxide/organoselenium catalyst systems, as "green reagents" for the oxidation of different organic functional groups. The topic of oxidations catalyzed by organoselenium derivatives has rapidly expanded in the last fifteen years This paper is devoted to the synthetic applications of the oxidation reactions mediated by selenium compounds such as selenium(IV) oxide, areneseleninic acids, their anhydrides, selenides, diselenides, benzisoselenazol-3(2H)-ones and other less often used other organoselenium compounds. All these compounds have been successfully applied for various oxidations useful in practical organic syntheses such as epoxidation, 1,2-dihydroxylation, and α-oxyfunctionalization of alkenes, as well as for ring contraction of cycloalkanones, conversion of halomethyl, hydroxymethyl or active methylene groups into formyl groups, oxidation of carbonyl compounds into carboxylic acids and/or lactones, sulfides into sulfoxides, and secondary amines into nitrones and regeneration of parent carbonyl compounds from their azomethine derivatives. Other reactions such as dehydrogenation and aromatization, active carbon-carbon bond cleavage, oxidative amidation, bromolactonization and oxidation of bromide for subsequent reactions with alkenes are also successfully mediated by selenium (IV) oxide or organoselenium compounds. The oxidation mechanisms of ionic or free radical character depending on the substrate and oxidant are discussed. Coverage of the literature up to early 2015 is provided. Links have been made to reviews that summarize earlier literature and to the methods of preparation of organoselenium reagents and catalysts.
Collapse
|
56
|
Yu L, Huang Y, Bai Z, Zhu B, Ding K, Chen T, Ding Y, Wang Y. The Aerobic Oxidation and C=C Bond Cleavage of Styrenes Catalyzed by Cerium(IV) Ammonium Nitrate (CAN). J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201400421] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
57
|
Yu L, Ye J, Zhang X, Ding Y, Xu Q. Recyclable (PhSe)2-catalyzed selective oxidation of isatin by H2O2: a practical and waste-free access to isatoic anhydride under mild and neutral conditions. Catal Sci Technol 2015. [DOI: 10.1039/c5cy01030f] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical and waste-free synthesis of isatoic anhydride was reported. The feature of this methodology is the simple isolation procedure by filtration, which facilitates the direct recovery and reuse of both organoselenium catalysts and solvents.
Collapse
Affiliation(s)
- Lei Yu
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- China
| | - Jianqing Ye
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- China
| | - Xu Zhang
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- China
| | - Yuanhua Ding
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- China
| | - Qing Xu
- Zhejiang Key Laboratory of Carbon Materials
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- China
| |
Collapse
|
58
|
Xu L, Huang J, Liu Y, Wang Y, Xu B, Ding K, Ding Y, Xu Q, Yu L, Fan Y. Design and application of the recyclable poly(l-proline-co-piperidine) catalyst for the synthesis of mesityl oxide from acetone. RSC Adv 2015. [DOI: 10.1039/c5ra05741h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel bi-component poly(l-proline-co-piperidine) catalyst was developed for the synthesis of mesityl oxide from acetone. The catalyst is more eco-friendly than traditional inorganic bases, avoiding the generation of corrosive solid, and the catalytic mechanism was studied.
Collapse
|
59
|
Zhang X, Guo R, Zhao X. Organoselenium-catalyzed synthesis of indoles through intramolecular C–H amination. Org Chem Front 2015. [DOI: 10.1039/c5qo00179j] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
An efficient approach for organoselenium-catalyzed synthesis of indoles via intramolecular C–H amination has been developed.
Collapse
Affiliation(s)
- Xuelin Zhang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Ruizhi Guo
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Xiaodan Zhao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| |
Collapse
|