1
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Choi J, Nawachi A, Saito N, Kondo Y, Morimoto H, Ohshima T. Evaluation of functional group compatibility and development of reaction-accelerating additives in ammonium salt-accelerated hydrazinolysis of amides. Front Chem 2024; 12:1378746. [PMID: 38841334 PMCID: PMC11150581 DOI: 10.3389/fchem.2024.1378746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 03/01/2024] [Indexed: 06/07/2024] Open
Abstract
Functional group compatibility in an amide bond cleavage reaction with hydrazine was evaluated for 26 functional groups in the functional group evaluation (FGE) kit. Accurate and rapid evaluation of the compatibility of functional groups, such as nitrogen-containing heterocycles important in drug discovery research, will enhance the application of this reaction in drug discovery research. These data will be used for predictive studies of organic synthesis methods based on machine learning. In addition, these studies led to discoveries such as the unexpected positive additive effects of carboxylic acids, indicating that the FGE kit can propel serendipitous discoveries.
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Affiliation(s)
- Jeesoo Choi
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Anna Nawachi
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Natsuki Saito
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuta Kondo
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Hiroyuki Morimoto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu Institute of Technology, Fukuoka, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
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2
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Qin H, Han Z, Bonku EM, Sun H, Odilov A, Zhu F, Abduahadi S, Zhu W, Shen J, Aisa HA. Direct esterification of amides by the dimethylsulfate-mediated activation of amide C-N bonds. Commun Chem 2024; 7:93. [PMID: 38678046 PMCID: PMC11055851 DOI: 10.1038/s42004-024-01180-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 04/16/2024] [Indexed: 04/29/2024] Open
Abstract
Amides are important intermediates in organic chemistry and the pharmaceutical industry, but their low reactivity requires catalysts and/or severe reaction conditions for esterification. Here, a novel approach was devised to convert amides into esters without the use of transition metals. The method effectively overcomes the inherent low reactivity of amides by employing dimethylsulfate-mediated reaction to activate the C-N bonds. To confirm the proposed reaction mechanism, control experiments and density functional theory (DFT) calculations were conducted. The method demonstrates a wide array of substrates, including amides with typical H/alkyl/aryl substitutions, N,N-disubstituted amides, amides derived from alkyl, aryl, or vinyl carboxylic acids, and even amino acid substrates with stereocentres. Furthermore, we have shown the effectiveness of dimethylsulfate in removing acyl protective groups in amino derivatives. This study presents a method that offers efficiency and cost-effectiveness in broadening the esterification capabilities of amides, thereby facilitating their increased utilization as synthetic compounds in diverse transformations.
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Affiliation(s)
- Hongjian Qin
- Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, Xinjiang, PR China
- University of Chinese Academy of Sciences, Beijing, PR China
| | - Zijian Han
- University of Chinese Academy of Sciences, Beijing, PR China
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Emmanuel Mintah Bonku
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Haiguo Sun
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Abdullajon Odilov
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Fuqiang Zhu
- Topharman Shanghai Co., Ltd., Shanghai, PR China
| | - Safomuddin Abduahadi
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Weiliang Zhu
- University of Chinese Academy of Sciences, Beijing, PR China.
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China.
| | - Jingshan Shen
- University of Chinese Academy of Sciences, Beijing, PR China.
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China.
| | - Haji A Aisa
- Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, Xinjiang, PR China.
- University of Chinese Academy of Sciences, Beijing, PR China.
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3
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Yan L, Ke Y, Wang Y, Yang J, He Y, Wu L. Effect of Mini-PEGs Modification on the Enzymatic Digestion of D-Amino Acid-Containing Peptides under the Action of PROK. Chemistry 2023; 29:e202203524. [PMID: 36541269 DOI: 10.1002/chem.202203524] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
It was previously reported that D-amino acid-containing peptides exhibited the ability to resist enzymatic hydrolysis. This study investigated the influence of mini-PEGs modification on enzymatic hydrolysis ability of D-amino acid-containing peptides. The results showed that PEGylation promoted enzymatic hydrolysis of the D-amino acid-containing peptide, especially, the cleavage rate of the D-amino acid-containing peptide 6-w with PEG3 modification at the N-ends was up to 17 times higher in the presence of proteinase K (PROK) compared to those without PEG3 modification. Moreover, analysis of the enzymatic cleavage sites demonstrated a similar cleavage pattern of the PEGylated D-amino acid-containing peptide to that of the unmodified peptide. The computational simulations further showed that the enhanced enzymatic hydrolysis ability can be attributed to the strong interaction between PROK and the peptide after PEG3 modification and the resulting formation of a mature catalytic triad structure.
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Affiliation(s)
- Liang Yan
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yongqi Ke
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yu Wang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jingkui Yang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yujian He
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences, Peking University, Beijing, 100191, P. R. China
| | - Li Wu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences, Peking University, Beijing, 100191, P. R. China
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4
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Han Q, Xu K, Tian F, Huang S, Zeng C. A Practical Transamidation Strategy for the N-Deacylation of Amides. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202112007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Chen J, Joseph D, Xia Y, Lee S. Amide/Ester Cross-Coupling via C–N/C–H Bond Cleavage: Synthesis of β-Ketoesters. J Org Chem 2021; 86:5943-5953. [DOI: 10.1021/acs.joc.0c02868] [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]
Affiliation(s)
- Jiajia Chen
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, People’s Republic of China
| | - Devaneyan Joseph
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, People’s Republic of China
| | - Sunwoo Lee
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
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6
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Dalabehera N, Meher S, Bhusana Palai B, Sharma NK. Instability of Amide Bond with Trifluoroacetic Acid (20%): Synthesis, Conformational Analysis, and Mechanistic Insights into Cleavable Amide Bond Comprising β-Troponylhydrazino Acid. ACS OMEGA 2020; 5:26141-26152. [PMID: 33073142 PMCID: PMC7557997 DOI: 10.1021/acsomega.0c03729] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 09/17/2020] [Indexed: 06/11/2023]
Abstract
The instability of an amide bond with dilute trifluoroacetic acid (TFA) is a rare chemical event. The native amide bonds are stable even in the neat TFA, which is one of the reagents that releases the peptides from the solid support in the solid-supported peptide synthesis method. In the repertoire of unnatural peptidomics, α-/β-hydrazino acids and their peptides are explored for the synthesis of N-amino peptide derivatives, and their amide bonds are stable in TFA (∼100%) as natural amide bonds. This report describes the synthesis of a β-hydrazino acid analogue as β-troponylhydrazino acid, containing a nonbenzenoid natural troponyl scaffold. The structural and conformational studies of their hybrid di-/tripeptides with the natural amino acid show that the 2-aminotroponyl residue is involved in hydrogen bonding. Surprisingly, the amide bond of β-troponylhydrazino peptides is cleavable with TFA (∼20%) through the formation of a new heterocyclic molecule N-troponylpyrazolidinone or troponylpyrazolidinone. Tropolone and related compounds are excellent biocompatible chromophores. Hence, β-troponylhydrazino acid could be employed for tuning the peptide structure and considered a promising chromophoric acid-sensitive protecting group of a free amine of amino acids/peptides. It could be applied for the estimation of the free amine group functionality by a UV-vis spectrophotometer.
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Affiliation(s)
- Nihar
Ranjan Dalabehera
- National
Institute of Science Education and Research (NISER)-Bhubaneswar, Jatni Campus, Jatni, Odisha 752050, India
- Homi
Bhabha National Institute (HBNI), HBNI-Mumbai, Mumbai 400 094, India
| | - Sagarika Meher
- National
Institute of Science Education and Research (NISER)-Bhubaneswar, Jatni Campus, Jatni, Odisha 752050, India
- Homi
Bhabha National Institute (HBNI), HBNI-Mumbai, Mumbai 400 094, India
| | - Bibhuti Bhusana Palai
- National
Institute of Science Education and Research (NISER)-Bhubaneswar, Jatni Campus, Jatni, Odisha 752050, India
- Homi
Bhabha National Institute (HBNI), HBNI-Mumbai, Mumbai 400 094, India
| | - Nagendra K. Sharma
- National
Institute of Science Education and Research (NISER)-Bhubaneswar, Jatni Campus, Jatni, Odisha 752050, India
- Homi
Bhabha National Institute (HBNI), HBNI-Mumbai, Mumbai 400 094, India
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7
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Hirai T, Kato D, Mai BK, Katayama S, Akiyama S, Nagae H, Himo F, Mashima K. Esterification of Tertiary Amides: Remarkable Additive Effects of Potassium Alkoxides for Generating Hetero Manganese-Potassium Dinuclear Active Species. Chemistry 2020; 26:10735-10742. [PMID: 32346933 PMCID: PMC7496701 DOI: 10.1002/chem.202001447] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Indexed: 02/03/2023]
Abstract
A catalyst system of mononuclear manganese precursor 3 combined with potassium alkoxide served as a superior catalyst compared with our previously reported manganese homodinuclear catalyst 2 a for esterification of not only tertiary aryl amides, but also tertiary aliphatic amides. On the basis of stoichiometric reactions of 3 and potassium alkoxide salt, kinetic studies, and density functional theory (DFT) calculations, we clarified a plausible reaction mechanism in which in situ generated manganese-potassium heterodinuclear species cooperatively activates the carbonyl moiety of the amide and the OH moiety of the alcohols. We also revealed details of the reaction mechanism of our previous manganese homodinuclear system 2 a, and we found that the activation free energy (ΔG≠ ) for the manganese-potassium heterodinuclear complex catalyzed esterification of amides is lower than that for the manganese homodinuclear system, which was consistent with the experimental results. We further applied our catalyst system to deprotect the acetyl moiety of primary and secondary amines.
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Affiliation(s)
- Takahiro Hirai
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Daiki Kato
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Binh Khanh Mai
- Department of Organic ChemistryArrhenius LaboratoryStockholm UniversitySE-106 91StockholmSweden
| | - Shoichiro Katayama
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Shoko Akiyama
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Haruki Nagae
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Fahmi Himo
- Department of Organic ChemistryArrhenius LaboratoryStockholm UniversitySE-106 91StockholmSweden
| | - Kazushi Mashima
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
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8
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Luo X, He R, Liu Q, Gao Y, Li J, Chen X, Zhu Z, Huang Y, Li Y. Metal-Free Oxidative Esterification of Ketones and Potassium Xanthates: Selective Synthesis of α-Ketoesters and Esters. J Org Chem 2020; 85:5220-5230. [DOI: 10.1021/acs.joc.9b03272] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xianglin Luo
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Runfa He
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Qiang Liu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yanping Gao
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Jingqing Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Xiuwen Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Zhongzhi Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Yubing Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Yibiao Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
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9
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Ohshima T, Morimoto H, Akkad W, Deguchi T. Mechanistic Studies of Nickel(II)-Catalyzed Direct Alcoholysis of 8-Aminoquinoline Amides. HETEROCYCLES 2020. [DOI: 10.3987/com-19-s(f)30] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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10
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Mashima K, Nishii Y, Nagae H. Catalytic Cleavage of Amide C-N Bond: Scandium, Manganese, and Zinc Catalysts for Esterification of Amides. CHEM REC 2019; 20:332-343. [PMID: 31507072 DOI: 10.1002/tcr.201900044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 08/20/2019] [Indexed: 11/06/2022]
Abstract
Amide C-N bonds are thermodynamically stable and their fission, such as by hydrolysis and alcoholysis, is considered a long-challenging organic reaction. In general, stoichiometric chemical transformations of amides into the corresponding esters and acids require harsh conditions, such as strong acids/bases at a high reaction temperature. Accordingly, the development of catalytic reactions that cleave not only primary and secondary amides, but also tertiary amides in mild conditions, is in high demand. Herein, we surveyed typical stoichiometric transformations of amides, and highlight our recent achievements in the catalytic esterification of amides using scandium, manganese, and zinc catalysts, together with some recent catalyst systems using late-transition metal reported by other groups.
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Affiliation(s)
- Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University Toyonaka, Osaka, 560-8531, Japan
| | - Yuji Nishii
- Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University Suita, Osaka, 565-0871, Japan
| | - Haruki Nagae
- Department of Chemistry, Graduate School of Engineering Science, Osaka University Toyonaka, Osaka, 560-8531, Japan
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11
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Rashed MN, Siddiki SMAH, Touchy AS, Jamil MAR, Poly SS, Toyao T, Maeno Z, Shimizu K. Direct Phenolysis Reactions of Unactivated Amides into Phenolic Esters Promoted by a Heterogeneous CeO
2
Catalyst. Chemistry 2019; 25:10594-10605. [DOI: 10.1002/chem.201901446] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/01/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Md. Nurnobi Rashed
- Institute for Catalysis Hokkaido University N-21, W-10 Sapporo 001-0021 Japan
| | | | | | - Md. A. R. Jamil
- Institute for Catalysis Hokkaido University N-21, W-10 Sapporo 001-0021 Japan
| | | | - Takashi Toyao
- Institute for Catalysis Hokkaido University N-21, W-10 Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University, Katsura Kyoto 615-8520 Japan
| | - Zen Maeno
- Institute for Catalysis Hokkaido University N-21, W-10 Sapporo 001-0021 Japan
| | - Ken‐ichi Shimizu
- Institute for Catalysis Hokkaido University N-21, W-10 Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University, Katsura Kyoto 615-8520 Japan
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12
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Bollu A, Sharma NK. Cleavable Amide Bond: Mechanistic Insight into Cleavable 4-Aminopyrazolyloxy Acetamide at Low pH. J Org Chem 2019; 84:5596-5602. [PMID: 30969775 DOI: 10.1021/acs.joc.9b00535] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cleavage of amide bonds under mild acidic conditions is a rare chemical event. N-Acetamide bond of peptides is extremely stable even under the strongest organic acid trifluoromethanesulfonic acid. This report mechanistically describes a new cleavable amide bond in 4-aminopyrazolyloxy acetamide peptide analogues under mild acidic conditions such as trifluoroacetic acid (10-20%) or HCl (0.1-4.0 N) at room temperature, and the formation of unusual lactam from 4-aminopyrazolyloxy acetic acid after evaporation of solvent. This is a rare chemical event in peptide bond, which could be explored as acid-sensitive protecting group of free amines.
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Affiliation(s)
- Amarnath Bollu
- School of Chemical Science , National Institute of Science Education and Research - (NISER) Bhubaneswar , Jatani 752050 , Odisha , India
| | - Nagendra K Sharma
- School of Chemical Science , National Institute of Science Education and Research - (NISER) Bhubaneswar , Jatani 752050 , Odisha , India.,HBNI-Mumbai , Mumbai 400094 , India
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13
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Noshita M, Shimizu Y, Morimoto H, Akai S, Hamashima Y, Ohneda N, Odajima H, Ohshima T. Ammonium Salt-Accelerated Hydrazinolysis of Unactivated Amides: Mechanistic Investigation and Application to a Microwave Flow Process. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.8b00424] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Megumi Noshita
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Yuhei Shimizu
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Hiroyuki Morimoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita 567-0871, Japan
| | - Yoshitaka Hamashima
- School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Shizuoka 422-8526, Japan
| | - Noriyuki Ohneda
- SAIDA FDS Inc., 143-10 Isshiki, Yaizu, Shizuoka 425-0054, Japan
| | - Hiromichi Odajima
- Pacific Microwave Technologies Corp., Seattle, Washington 98116, United States
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
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14
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Nagae H, Hirai T, Kato D, Soma S, Akebi SY, Mashima K. Dinuclear manganese alkoxide complexes as catalysts for C-N bond cleavage of simple tertiary N, N-dialkylamides to give esters. Chem Sci 2019; 10:2860-2868. [PMID: 30996863 PMCID: PMC6429592 DOI: 10.1039/c8sc05819a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 01/28/2019] [Indexed: 02/03/2023] Open
Abstract
Amide bonds are stable due to the resonance between the nitrogen lone pair and the carbonyl moiety, and therefore the chemical transformation of amides, especially tertiary amides, involving C-N bond fission is considered one of the most difficult organic reactions, unavoidably requiring harsh reaction conditions and strong acids or bases. We report the catalytic C-N bond cleavage of simple tertiary N,N-dialkylamides to give corresponding esters using a catalyst system (2 mol% based on Mn atoms) of a tetranuclear manganese alkoxide, [Mn(acac)(OEt)(EtOH)]4 (1c), combined with four equivalents of 4,7-bis(dimethylamino)-1,10-phenanthroline (L1: Me2N-Phen). Regarding the reaction mechanism, we isolated a dinuclear manganese complex, [Mn(acac)(OEt)(Phen)]2 (6c), which was revealed as the catalytically active species for the esterification of tertiary amides.
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Affiliation(s)
- Haruki Nagae
- Department of Chemistry , Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan .
| | - Takahiro Hirai
- Department of Chemistry , Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan .
| | - Daiki Kato
- Department of Chemistry , Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan .
| | - Shusei Soma
- Department of Chemistry , Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan .
| | - Shin-Ya Akebi
- Department of Chemistry , Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan .
| | - Kazushi Mashima
- Department of Chemistry , Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan .
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15
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Stevens JM, Parra-Rivera AC, Dixon DD, Beutner GL, DelMonte AJ, Frantz DE, Janey JM, Paulson J, Talley MR. Direct Lewis Acid Catalyzed Conversion of Enantioenriched N-Acyloxazolidinones to Chiral Esters, Amides, and Acids. J Org Chem 2018; 83:14245-14261. [DOI: 10.1021/acs.joc.8b02451] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Jason M. Stevens
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
| | - Ana Cristina Parra-Rivera
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Darryl D. Dixon
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
| | - Gregory L. Beutner
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
| | - Albert J. DelMonte
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
| | - Doug E. Frantz
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Jacob M. Janey
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
| | - James Paulson
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
| | - Michael R. Talley
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
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16
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Toyao T, Nurnobi Rashed M, Morita Y, Kamachi T, Hakim Siddiki SMA, Ali MA, Touchy AS, Kon K, Maeno Z, Yoshizawa K, Shimizu K. Esterification of Tertiary Amides by Alcohols Through C−N Bond Cleavage over CeO
2. ChemCatChem 2018. [DOI: 10.1002/cctc.201801098] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takashi Toyao
- Institute for Catalysis and IRCCSHokkaido University N-21, W-10, Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysis and BatteriesKyoto University Kyoto 615-8520 Japan
| | - Md. Nurnobi Rashed
- Institute for Catalysis and IRCCSHokkaido University N-21, W-10, Sapporo 001-0021 Japan
| | - Yoshitsugu Morita
- Institute for Materials Chemistry and Engineering and IRCCSKyushu University Fukuoka 819-0395 Japan
- Department of Applied Chemistry Faculty of Science and EngineeringChuo University 1-13-27 Kasuga Bunkyo-ku Japan
| | - Takashi Kamachi
- Elements Strategy Initiative for Catalysis and BatteriesKyoto University Kyoto 615-8520 Japan
- Institute for Materials Chemistry and Engineering and IRCCSKyushu University Fukuoka 819-0395 Japan
- Department of Life, Environment and Materials ScienceFukuoka Institute of Technology (FIT) 3-30-1 Wajiro-Higashi, Higashi-ku Fukuoka 811-0295 Japan
| | | | - Md. A. Ali
- Institute for Catalysis and IRCCSHokkaido University N-21, W-10, Sapporo 001-0021 Japan
| | - A. S. Touchy
- Institute for Catalysis and IRCCSHokkaido University N-21, W-10, Sapporo 001-0021 Japan
| | - Kenichi Kon
- Institute for Catalysis and IRCCSHokkaido University N-21, W-10, Sapporo 001-0021 Japan
| | - Zen Maeno
- Institute for Catalysis and IRCCSHokkaido University N-21, W-10, Sapporo 001-0021 Japan
| | - Kazunari Yoshizawa
- Elements Strategy Initiative for Catalysis and BatteriesKyoto University Kyoto 615-8520 Japan
- Institute for Materials Chemistry and Engineering and IRCCSKyushu University Fukuoka 819-0395 Japan
| | - Ken‐ichi Shimizu
- Institute for Catalysis and IRCCSHokkaido University N-21, W-10, Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysis and BatteriesKyoto University Kyoto 615-8520 Japan
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17
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Subramanian K, Yedage SL, Bhanage BM. Electrodimerization of N
-Alkoxyamides for Zinc(II) Catalyzed Phenolic Ester Synthesis under Mild Reaction Conditions. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701646] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kripa Subramanian
- Department of Chemistry; Institute of Chemical Technology; Mumbai- 400 019 India
| | - Subhash L. Yedage
- Department of Chemistry; Institute of Chemical Technology; Mumbai- 400 019 India
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18
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Combined theoretical and experimental study on alcoholysis of amides on CeO2 surface: A catalytic interplay between Lewis acid and base sites. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.09.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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19
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Chen X, Hu S, Chen R, Wang J, Wu M, Guo H, Sun S. Fe-catalyzed esterification of amides via C–N bond activation. RSC Adv 2018; 8:4571-4576. [PMID: 35539529 PMCID: PMC9077769 DOI: 10.1039/c7ra12152k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 01/06/2018] [Indexed: 11/21/2022] Open
Abstract
An efficient Fe-catalyzed esterification of primary, secondary, and tertiary amides with various alcohols was performed. Esterification was accomplished with inexpensive, environmentally friendly FeCl3·6H2O, and with high functional group tolerance
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Affiliation(s)
| | - Siying Hu
- Hubei University Of Science and Technology
- China
| | | | - Jian Wang
- Hubei University Of Science and Technology
- China
| | - Minghu Wu
- Hubei University Of Science and Technology
- China
| | - Haibin Guo
- Hubei University Of Science and Technology
- China
| | - Shaofa Sun
- Hubei University Of Science and Technology
- China
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20
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Wybon CCD, Mensch C, Hollanders C, Gadais C, Herrebout WA, Ballet S, Maes BUW. Zn-Catalyzed tert-Butyl Nicotinate-Directed Amide Cleavage as a Biomimic of Metallo-Exopeptidase Activity. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02599] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Clarence C. D. Wybon
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Carl Mensch
- Molecular Spectroscopy, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Charlie Hollanders
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- Organic Chemistry, Departments of Chemistry and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Charlène Gadais
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- Organic Chemistry, Departments of Chemistry and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Wouter A. Herrebout
- Molecular Spectroscopy, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Steven Ballet
- Organic Chemistry, Departments of Chemistry and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Bert U. W. Maes
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
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21
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Nishii Y, Hirai T, Fernandez S, Knochel P, Mashima K. Zinc-Catalyzed Esterification of N
-β-Hydroxyethylamides: Removal of Directing Groups under Mild Conditions. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700748] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yuji Nishii
- Frontier Research Base for Global Young Researchers; Graduate School of Engineering; Osaka University; Suita 565-0871 Osaka Japan
| | - Takahiro Hirai
- Department of Chemistry; Graduate School of Engineering Science; Osaka University; Toyonaka 560-8531 Osaka Japan
| | - Sarah Fernandez
- Ludwig-Maximilians-Universität München; Department Chemie; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Paul Knochel
- Ludwig-Maximilians-Universität München; Department Chemie; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Kazushi Mashima
- Department of Chemistry; Graduate School of Engineering Science; Osaka University; Toyonaka 560-8531 Osaka Japan
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22
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Deguchi T, Xin HL, Morimoto H, Ohshima T. Direct Catalytic Alcoholysis of Unactivated 8-Aminoquinoline Amides. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00442] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Toru Deguchi
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, Japan, 812-8582
| | - Hai-Long Xin
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, Japan, 812-8582
| | - Hiroyuki Morimoto
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, Japan, 812-8582
| | - Takashi Ohshima
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, Japan, 812-8582
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23
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Tf2O-TMDS combination for the direct reductive transformation of secondary amides to aldimines, aldehydes, and/or amines. Sci China Chem 2016. [DOI: 10.1007/s11426-016-0224-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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24
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Abou-Elkhair RAI, Hassan AEA, Boykin DW, Wilson WD. Lithium Hexamethyldisilazane Transformation of Transiently Protected 4-Aza/Benzimidazole Nitriles to Amidines and their Dimethyl Sulfoxide Mediated Imidazole Ring Formation. Org Lett 2016; 18:4714-7. [PMID: 27607538 DOI: 10.1021/acs.orglett.6b02359] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Trimethylsilyl-transient protection successfully allowed the use of lithium hexamethyldisilazane to prepare benzimidazole (BI) and 4-azabenzimidazole (azaBI) amidines from nitriles in 58-88% yields. This strategy offers a much better choice to prepare BI/azaBI amidines than the lengthy, low-yielding Pinner reaction. Synthesis of aza/benzimidazole rings from aromatic diamines and aldehydes was affected in dimethyl sulfoxide in 10-15 min, while known procedures require long time and purification. These methods are important for the BI/azaBI-based drug industry and for developing specific DNA binders for expanded therapeutic applications.
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Affiliation(s)
- Reham A I Abou-Elkhair
- Department of Chemistry, Georgia State University , Atlanta, Georgia 30303, United States.,Applied Nucleic Acids Research Center & Chemistry Department, Faculty of Sciences, Zagazig University , Zagazig 44519, Egypt
| | - Abdalla E A Hassan
- Applied Nucleic Acids Research Center & Chemistry Department, Faculty of Sciences, Zagazig University , Zagazig 44519, Egypt
| | - David W Boykin
- Department of Chemistry, Georgia State University , Atlanta, Georgia 30303, United States
| | - W David Wilson
- Department of Chemistry, Georgia State University , Atlanta, Georgia 30303, United States
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25
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Kong W, Li B, Xu X, Song Q. Fe-Catalyzed Aerobic Oxidative C–CN Bond Cleavage of Arylacetonitriles Leading to Various Esters. J Org Chem 2016; 81:8436-43. [DOI: 10.1021/acs.joc.6b01594] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Weiguang Kong
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen, Fujian 361021, P. R. China
| | - Bingnan Li
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen, Fujian 361021, P. R. China
| | - Xuezhao Xu
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen, Fujian 361021, P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen, Fujian 361021, P. R. China
- Beijing National Laboratory for Molecular Sciences, Beijing, 100190, China
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26
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Bian Y, Qu X. K2CO3-promoted formation of aryl esters from primary aryl amides by the acyl-acyl exchange process. Org Biomol Chem 2016; 14:3869-72. [PMID: 27035611 DOI: 10.1039/c6ob00187d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new acyl-acyl exchange reaction has been developed for the formation of aryl esters from primary aryl amides. The reaction could occur under mild reaction conditions with catalytic quantities of K2CO3, and could afford moderate to good yields of the desired products.
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Affiliation(s)
- Yongjun Bian
- College of Chemistry and Chemical Engineering, Jinzhong University, Yuci 030619, P. R. of China.
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27
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Sambiagio C, Munday RH, John Blacker A, Marsden SP, McGowan PC. Green alternative solvents for the copper-catalysed arylation of phenols and amides. RSC Adv 2016. [DOI: 10.1039/c6ra02265k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The use of alkyl acetates as green organic solvents for the Cu-catalysed arylation of phenols and amides is reported.
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Affiliation(s)
- Carlo Sambiagio
- Institute for Process Research and Development (iPRD)
- School of Chemistry
- University of Leeds
- Leeds
- UK
| | | | - A. John Blacker
- Institute for Process Research and Development (iPRD)
- School of Chemistry
- University of Leeds
- Leeds
- UK
| | - Stephen P. Marsden
- Institute for Process Research and Development (iPRD)
- School of Chemistry
- University of Leeds
- Leeds
- UK
| | - Patrick C. McGowan
- Institute for Process Research and Development (iPRD)
- School of Chemistry
- University of Leeds
- Leeds
- UK
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28
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Amyl nitrite-mediated conversion of aromatic and heteroaromatic primary amides to carboxylic acids. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Wang AE, Chang Z, Liu YP, Huang PQ. Mild N-deacylation of secondary amides by alkylation with organocerium reagents. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.05.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Shimizu Y, Noshita M, Mukai Y, Morimoto H, Ohshima T. Cleavage of unactivated amide bonds by ammonium salt-accelerated hydrazinolysis. Chem Commun (Camb) 2015; 50:12623-5. [PMID: 24888986 DOI: 10.1039/c4cc02014f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrazinolysis of unactivated amide bonds is significantly accelerated by the addition of ammonium salts. The reactions proceed at 50-70 °C to give amines with broad substrate scope that outperforms existing amide bond cleavage reactions. Application to peptide and amino sugar derivatives is also demonstrated.
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Affiliation(s)
- Yuhei Shimizu
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan.
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31
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A general method for the direct transformation of common tertiary amides into ketones and amines by addition of Grignard reagents. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.074] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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Xia J, Shao A, Tang S, Gao X, Gao M, Lei A. Palladium-catalysed oxidative cross-esterification between two alcohols. Org Biomol Chem 2015; 13:6154-7. [DOI: 10.1039/c5ob00677e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxidative cross-esterification between two alcohols was achieved by using PdCl2(PPh3)2 as the sole catalyst and benzyl chloride as the oxidant.
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Affiliation(s)
- Jianhui Xia
- National Research Center for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Ailong Shao
- National Research Center for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Shan Tang
- College of Chemistry and Molecular Sciences
- the Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Xinlong Gao
- College of Chemistry and Molecular Sciences
- the Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Meng Gao
- National Research Center for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Aiwen Lei
- National Research Center for Carbohydrate Synthesis
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
- College of Chemistry and Molecular Sciences
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33
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Atkinson BN, Williams JM. Scandium triflate catalyzed ester synthesis using primary amides. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.124] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Siddiki SMAH, Touchy AS, Tamura M, Shimizu KI. Versatile and sustainable alcoholysis of amides by a reusable CeO2 catalyst. RSC Adv 2014. [DOI: 10.1039/c4ra07419j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CeO2 was found to be a versatile and reusable heterogeneous catalyst for direct alcoholysis of primary amides to esters under neutral conditions, providing a sustainable, general, and economic synthetic method of esters.
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Affiliation(s)
| | | | - Masazumi Tamura
- Department of Applied Chemistry
- School of Engineering
- Tohoku University
- Aoba-ku, Japan
| | - Ken-ichi Shimizu
- Elements Strategy Initiative for Catalysts and Batteries
- Kyoto University
- Katsura, Japan
- Catalysis Research Center
- Hokkaido University
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