1
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Dale HA, Hodges GR, Lloyd-Jones GC. Kinetics and Mechanism of Azole n-π*-Catalyzed Amine Acylation. J Am Chem Soc 2023; 145:18126-18140. [PMID: 37526380 PMCID: PMC10436283 DOI: 10.1021/jacs.3c06258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Indexed: 08/02/2023]
Abstract
Azole anions are highly competent in the activation of weak acyl donors, but, unlike neutral (aprotic) Lewis bases, are not yet widely applied as acylation catalysts. Using a combination of in situ and stopped-flow 1H/19F NMR spectroscopy, kinetics, isotopic labeling, 1H DOSY, and electronic structure calculations, we have investigated azole-catalyzed aminolysis of p-fluorophenyl acetate. The global kinetics have been elucidated under four sets of conditions, and the key elementary steps underpinning catalysis deconvoluted using a range of intermediates and transition state probes. While all evidence points to an overarching mechanism involving n-π* catalysis via N-acylated azole intermediates, a diverse array of kinetic regimes emerges from this framework. Even seemingly minor changes to the solvent, auxiliary base, or azole catalyst can elicit profound changes in the temporal evolution, thermal sensitivity, and progressive inhibition of catalysis. These observations can only be rationalized by taking a holistic view of the mechanism and a set of limiting regimes for the kinetics. Overall, the analysis of 18 azole catalysts spanning nearly 10 orders of magnitude in acidity highlights the pitfall of pursuing ever more nucleophilic catalysts without regard for catalyst speciation.
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Affiliation(s)
- Harvey
J. A. Dale
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K.
| | - George R. Hodges
- Jealott’s
Hill International Research Centre, Syngenta, Bracknell, Berkshire RG42 6EY, U.K.
| | - Guy C. Lloyd-Jones
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K.
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2
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Chen YG, Yu HB, Tian Y, Peng C, Xie MS, Guo HM. ArPNO-Catalyzed Acylative Dynamic Kinetic Resolution of 3-Hydroxyphthalides: Access to Enantioenriched Phthalidyl Esters. Org Lett 2023. [PMID: 37471120 DOI: 10.1021/acs.orglett.3c01915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
A chiral 4-aryl-pyridine-N-oxide nucleophilic organocatalyst was used to synthesize chiral phthalidyl ester prodrugs by the acylative dynamic kinetic resolution process. By using the 3,5-dimethylphenyl-derived ArPNO catalyst, the phthalidyl esters were obtained in up to 97% yield with 97% ee at room temperature. Two phthalidyl esters of prodrugs, talosalate and talmetacin, were generated. By control experiments and density functional theory calculations, an acyl transfer mechanism was proposed.
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Affiliation(s)
- Yang-Guang Chen
- School of Environment, Henan Normal University, Xinxiang, Henan 453007, China
| | - Heng-Bin Yu
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yin Tian
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Ming-Sheng Xie
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Hai-Ming Guo
- School of Environment, Henan Normal University, Xinxiang, Henan 453007, China
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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3
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Liu S, Shi S, Ding S, Xiao W, Wang H, Zeng R, Zhao D, Chen C, Song W. Imidazole Functionalized Porous Organic Polymer Stabilizing Palladium Nanoparticles for the Enhanced Catalytic Dehydrogenative Coupling of Silanes with Alcohols. ChemistrySelect 2022. [DOI: 10.1002/slct.202203056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Senqun Liu
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
| | - Shunli Shi
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
| | - Shunmin Ding
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
| | - Weiming Xiao
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
| | - Herong Wang
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
| | - Rong Zeng
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
- School of Chemistry Biology and Materials Science East China University of Technology Nanchang 330013 P.R. China
| | - Dan Zhao
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
| | - Chao Chen
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
| | - Weiguo Song
- School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China
- Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
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4
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Mandai H, Matsuura Y, Johari FMB, Mitsudo K, Suga S. An Efficient Protocol for Selective Silylation of Hydroxy Group Using N, O-Bis( tert-butyldimethylsilyl)acetamide and N, N-Dimethyl-4-aminopyridine N-oxide. CHEM LETT 2022. [DOI: 10.1246/cl.220281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroki Mandai
- Department of Pharmacy, Faculty of Pharmacy, Gifu University of Medical Science, 4-3-3 Nijigaoka, Kani, Gifu, 509-0293
| | - Yuichiro Matsuura
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka Kita-ku, Okayama 700-8530
| | - Fatin Mahfuzah Binti Johari
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka Kita-ku, Okayama 700-8530
| | - Koichi Mitsudo
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka Kita-ku, Okayama 700-8530
| | - Seiji Suga
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka Kita-ku, Okayama 700-8530
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5
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Zhang Y, Chen Y. Recent advances in catalytic asymmetric [1,3]-rearrangement reactions. Org Chem Front 2022. [DOI: 10.1039/d2qo01027e] [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
This review covering the recent advances of asymmetric 1,3-rearrangement reactions is divided into four different fields, including transition metal catalysis, nucleophilic catalysis, Brønsted acid catalysis and Lewis acid catalysis.
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Affiliation(s)
- Yulong Zhang
- College of Chemistry, Chongqing Normal University, Chongqing 401331, China
| | - Yushuang Chen
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
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6
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Xie MS, Shan M, Li N, Chen YG, Wang XB, Cheng X, Tian Y, Wu XX, Deng Y, Qu GR, Guo HM. Chiral 4-Aryl-pyridine-N-oxide Nucleophilic Catalysts: Design, Synthesis, and Application in Acylative Dynamic Kinetic Resolution. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04923] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ming-Sheng Xie
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Meng Shan
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Ning Li
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Yang-Guang Chen
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Xiao-Bing Wang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Xuan Cheng
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Yin Tian
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Xiao-Xia Wu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Yun Deng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Gui-Rong Qu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Hai-Ming Guo
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
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7
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Xie MS, Li N, Tian Y, Wu XX, Deng Y, Qu GR, Guo HM. Dynamic Kinetic Resolution of Carboxylic Esters Catalyzed by Chiral PPY N-Oxides: Synthesis of Nonsteroidal Anti-Inflammatory Drugs and Mechanistic Insights. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ming-Sheng Xie
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People’s Republic of China
| | - Ning Li
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People’s Republic of China
| | - Yin Tian
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, People’s Republic of China
| | - Xiao-Xia Wu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People’s Republic of China
| | - Yun Deng
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, People’s Republic of China
| | - Gui-Rong Qu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People’s Republic of China
| | - Hai-Ming Guo
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People’s Republic of China
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8
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Ashraf MA, Liu Z, Li C, Zhang D. Recent advances in catalytic silylation of hydroxyl‐bearing compounds: A green technique for protection of alcohols using Si–O bond formations. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Muhammad Aqeel Ashraf
- School of Forestry Henan Agricultural University Zhengzhou 450002 China
- School of Environmental Studies China University of Geosciences Wuhan 430074 China
| | - Zhenling Liu
- School of Management Henan University of Technology Zhengzhou 450001 China
| | - Cheng Li
- School of Forestry Henan Agricultural University Zhengzhou 450002 China
| | - Dangquan Zhang
- School of Forestry Henan Agricultural University Zhengzhou 450002 China
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9
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Xie MS, Huang B, Li N, Tian Y, Wu XX, Deng Y, Qu GR, Guo HM. Rational Design of 2-Substituted DMAP- N-oxides as Acyl Transfer Catalysts: Dynamic Kinetic Resolution of Azlactones. J Am Chem Soc 2020; 142:19226-19238. [PMID: 33119307 DOI: 10.1021/jacs.0c09075] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel concept that conversion of chiral 2-substituted DMAP into its DMAP-N-oxide could significantly enhance the catalytic activity and still be used as an acyl transfer catalyst is presented. A new type of chiral 2-substituted DMAP-N-oxides, derived from l-prolinamides, has been rationally designed, facilely synthesized, and applied in the dynamic kinetic resolution of azlactones. Using simple MeOH as the nucleophile, various l-amino acid derivatives were produced in high yields (up to 98% yield) and enantioselectivities (up to 96% ee). Furthermore, α-deuterium labeled l-phenylalanine derivative was also obtained. Experiments and DFT calculations revealed that in 2-substituted DMAP-N-oxide, the oxygen atom acted as the nucleophilic site and the N-H bond functioned as the H-bond donor. High enantioselectivity of the reaction was governed by steric factors, and the addition of benzoic acid reduced the activation energy by participating in the construction of a H-bond bridge. The theoretical chemical study indicated that only when attack directions of the chiral catalyst were fully considered could the correct calculation results be obtained. This work paves the way for the utilization of the C2 position of the pyridine ring and the development of chiral 2-substituted DMAP-N-oxides as efficient acyl transfer catalysts.
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Affiliation(s)
- Ming-Sheng Xie
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Bin Huang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Ning Li
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yin Tian
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Xiao-Xia Wu
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yun Deng
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Gui-Rong Qu
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Hai-Ming Guo
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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10
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Shan M, Liang T, Zhang YF, Xie MS, Qu GR, Guo HM. Enantioselective rearrangement of indolyl carbonates catalyzed by chiral DMAP-N-oxides. Org Chem Front 2019. [DOI: 10.1039/c9qo01146c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Bifunctional chiral DMAP-N-oxides, which utilize the oxygen atom as a nucleophilic site, have been reported for the highly enantioselective rearrangement of indolyl carbonates.
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Affiliation(s)
- Meng Shan
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Tao Liang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Ye-Fei Zhang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Ming-Sheng Xie
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Gui-Rong Qu
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Hai-Ming Guo
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
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11
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Marin-Luna M, Patschinski P, Zipse H. Substituent Effects in the Silylation of Secondary Alcohols: A Mechanistic Study. Chemistry 2018; 24:15052-15058. [DOI: 10.1002/chem.201803014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Marta Marin-Luna
- Department of Chemistry; LMU München; Butenandtstrass 5-13 81377 München Germany
| | - Pascal Patschinski
- Department of Chemistry; LMU München; Butenandtstrass 5-13 81377 München Germany
| | - Hendrik Zipse
- Department of Chemistry; LMU München; Butenandtstrass 5-13 81377 München Germany
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12
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Braddock DC, Lickiss PD, Rowley BC, Pugh D, Purnomo T, Santhakumar G, Fussell SJ. Tetramethyl Orthosilicate (TMOS) as a Reagent for Direct Amidation of Carboxylic Acids. Org Lett 2018; 20:950-953. [PMID: 29394071 DOI: 10.1021/acs.orglett.7b03841] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Tetramethyl orthosilicate (TMOS) is shown to be an effective reagent for direct amidation of aliphatic and aromatic carboxylic acids with amines and anilines. The amide products are obtained in good to quantitative yields in pure form directly after workup without the need for any further purification. A silyl ester as the putative activated intermediate is observed by NMR methods. Amidations on a 1 mol scale are demonstrated with a favorable process mass intensity.
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Affiliation(s)
- D Christopher Braddock
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Paul D Lickiss
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Ben C Rowley
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - David Pugh
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Teresa Purnomo
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
| | - Gajan Santhakumar
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, U.K
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13
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Brahmayya M, Suen SY, Dai SA. Sulfonated graphene oxide-catalyzed N-acetylation of amines with acetonitrile under sonication. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2017.12.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Jang HS, Kim HK. Novel Direct Synthesis of Asymmetrical Urea Compounds from Trichloroethyl Carbamates Using Catalytic DBU. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11314] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ho Seong Jang
- Materials Architecturing Research Center; Korea Institute of Science and Technology; Seoul 02792 Republic of Korea
| | - Hee-Kwon Kim
- Department of Nuclear Medicine, Molecular Imaging and Therapeutic Medicine Research Center, Biomedical Research Institute; Chonbuk National University Medical School and Hospital; Jeonju Jeonbuk 561-712 Republic of Korea
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15
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Toda Y, Sakamoto T, Komiyama Y, Kikuchi A, Suga H. A Phosphonium Ylide as an Ionic Nucleophilic Catalyst for Primary Hydroxyl Group Selective Acylation of Diols. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02281] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yasunori Toda
- Department of Materials
Chemistry,
Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Tomoyuki Sakamoto
- Department of Materials
Chemistry,
Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Yutaka Komiyama
- Department of Materials
Chemistry,
Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Ayaka Kikuchi
- Department of Materials
Chemistry,
Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Hiroyuki Suga
- Department of Materials
Chemistry,
Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
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16
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Murray JI, Flodén NJ, Bauer A, Fessner ND, Dunklemann DL, Bob-Egbe O, Rzepa HS, Bürgi T, Richardson J, Spivey AC. Kinetic Resolution of 2-Substituted Indolines by N-Sulfonylation using an Atropisomeric 4-DMAP-N-oxide Organocatalyst. Angew Chem Int Ed Engl 2017; 56:5760-5764. [PMID: 28444918 DOI: 10.1002/anie.201700977] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/27/2017] [Indexed: 01/01/2023]
Abstract
The first catalytic kinetic resolution by N-sulfonylation is described. 2-Substituted indolines are resolved (s=2.6-19) using an atropisomeric 4-dimethylaminopyridine-N-oxide (4-DMAP-N-oxide) organocatalyst. Use of 2-isopropyl-4-nitrophenylsulfonyl chloride is critical to the stereodiscrimination and enables facile deprotection of the sulfonamide products with thioglycolic acid. A qualitative model that accounts for the stereodiscrimination is proposed.
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Affiliation(s)
- James I Murray
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Nils J Flodén
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Adriano Bauer
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Nico D Fessner
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Daniel L Dunklemann
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Opetoritse Bob-Egbe
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Henry S Rzepa
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Thomas Bürgi
- Université de Genève, Département de Chimie Physique, Quai Ernest-Ansermet 30, 1211, Genève 4, Switzerland
| | - Jeffery Richardson
- Eli Lilly and Company Limited, Erl Wood Manor, Windlesham, Surrey, GU20 6PH, UK
| | - Alan C Spivey
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
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Murray JI, Flodén NJ, Bauer A, Fessner ND, Dunklemann DL, Bob-Egbe O, Rzepa HS, Bürgi T, Richardson J, Spivey AC. Kinetic Resolution of 2-Substituted Indolines by N
-Sulfonylation using an Atropisomeric 4-DMAP-N
-oxide Organocatalyst. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700977] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- James I. Murray
- Department of Chemistry; Imperial College London; South Kensington Campus London SW7 2AZ UK
| | - Nils J. Flodén
- Department of Chemistry; Imperial College London; South Kensington Campus London SW7 2AZ UK
| | - Adriano Bauer
- Department of Chemistry; Imperial College London; South Kensington Campus London SW7 2AZ UK
| | - Nico D. Fessner
- Department of Chemistry; Imperial College London; South Kensington Campus London SW7 2AZ UK
| | - Daniel L. Dunklemann
- Department of Chemistry; Imperial College London; South Kensington Campus London SW7 2AZ UK
| | - Opetoritse Bob-Egbe
- Department of Chemistry; Imperial College London; South Kensington Campus London SW7 2AZ UK
| | - Henry S. Rzepa
- Department of Chemistry; Imperial College London; South Kensington Campus London SW7 2AZ UK
| | - Thomas Bürgi
- Université de Genève; Département de Chimie Physique; Quai Ernest-Ansermet 30 1211 Genève 4 Switzerland
| | - Jeffery Richardson
- Eli Lilly and Company Limited; Erl Wood Manor Windlesham Surrey GU20 6PH UK
| | - Alan C. Spivey
- Department of Chemistry; Imperial College London; South Kensington Campus London SW7 2AZ UK
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18
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Frampton CS, Murray JI, Spivey AC. Crystal structure of 1-methylimidazole 3-oxide monohydrate. Acta Crystallogr E Crystallogr Commun 2017; 73:372-374. [PMID: 28316812 PMCID: PMC5347057 DOI: 10.1107/s2056989017002079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 02/08/2017] [Indexed: 11/14/2022]
Abstract
1-Methylimidazole 3-N-oxide (NMI-O) crystallizes as a monohydrate, C4H6N2O·H2O, in the monoclinic space group P21 with Z' = 2 (mol-ecules A and B). The imidazole rings display a planar geometry (r.m.s. deviations = 0.0008 and 0.0002 Å) and are linked in the crystal structure into infinite zigzag strands of ⋯NMI-O(A)⋯OH2⋯NMI-O(B)⋯OH2⋯ units by O-H⋯O hydrogen bonds. These chains propagate along the b-axis direction of the unit cell.
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Affiliation(s)
- Christopher S. Frampton
- Wolfson Centre for Materials Processing, Brunel University London, Kingston Lane, Uxbridge, UB8 3PH, UK
| | - James I. Murray
- Department of Chemistry, South Kensington Campus, Imperial College London, London, SW7 2AZ, UK
| | - Alan C. Spivey
- Department of Chemistry, South Kensington Campus, Imperial College London, London, SW7 2AZ, UK
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Read JA, Woerpel KA. Allylmagnesium Halides Do Not React Chemoselectively Because Reaction Rates Approach the Diffusion Limit. J Org Chem 2017; 82:2300-2305. [DOI: 10.1021/acs.joc.7b00053] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jacquelyne A. Read
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - K. A. Woerpel
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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Yoshida K, Suzuki H, Inoue H, Matsui K, Fujino Y, Kanoko Y, Itatsu Y, Takao KI. Organocatalytic Regioselective Chlorosilylation of Oxirane Derivatives: Mild and Effective Insertion of Bulky Silyl Chloride by Using 4-MethoxypyridineN-Oxide. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600209] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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