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Inokuma T. Synthesis of Non-canonical Amino Acids and Peptide Containing Them for Establishment of the Template for Drug Discovery. Chem Pharm Bull (Tokyo) 2021; 69:303-313. [PMID: 33790076 DOI: 10.1248/cpb.c21-00031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Non-canonical amino acid derivatives are an attractive scaffold for novel drug candidates. Among the methods used to prepare this motif, the asymmetric Mannich-type reaction of α-imino carboxylic acid derivatives is a preeminent strategy because a wide variety of non-canonical amino acids can be accessed by changing only the nucleophile. Preparing the common substrate is difficult, however, which makes this method problematic. We developed a convenient method for synthesizing common substrates using MnO2-mediated oxidation of stable precursors. Peptides bearing non-canonical amino acids are another attractive synthetic target. We propose a new approach for synthesizing non-canonical amino acid-containing peptides by directly applying various organic reactions to peptidic substrates. Using hydrophobic anchor-supported peptides, we directly applied ring-closing metathesis and asymmetric Friedel-Crafts reactions to peptidic substrates. We also developed a novel recyclable organocatalyst according to the nature of the hydrophobic anchor tagged compound.
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Affiliation(s)
- Tsubasa Inokuma
- Graduate School of Biomedical Sciences, Tokushima University
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2
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Ciccolini C, De Crescentini L, Mantellini F, Mari G, Santeusanio S, Favi G. Construction of Unusual Indole-Based Heterocycles from Tetrahydro-1 H-pyridazino[3,4- b]indoles. Molecules 2020; 25:molecules25184124. [PMID: 32916997 PMCID: PMC7571100 DOI: 10.3390/molecules25184124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/04/2020] [Accepted: 09/07/2020] [Indexed: 11/21/2022] Open
Abstract
Herein, we report the successful syntheses of scarcely represented indole-based heterocycles which have a structural connection with biologically active natural-like molecules. The selective oxidation of indoline nucleus to indole, hydrolysis of ester and carbamoyl residues followed by decarboxylation with concomitant aromatization of the pyridazine ring starting from tetrahydro-1H-pyridazino[3,4-b]indole derivatives lead to fused indole-pyridazine compounds. On the other hand, non-fused indole-pyrazol-5-one scaffolds are easily prepared by subjecting the same C2,C3-fused indoline tetrahydropyridazines to treatment with trifluoroacetic acid (TFA). These methods feature mild conditions, easy operation, high yields in most cases avoiding the chromatographic purification, and broad substrate scope. Interestingly, the formation of indole linked pyrazol-5-one system serves as a good example of the application of the umpolung strategy in the synthesis of C3-alkylated indoles.
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Pandey AM, Agalave SG, Vinod CP, Gnanaprakasam B. MnO 2 @Fe 3 O 4 Magnetic Nanoparticles as Efficient and Recyclable Heterogeneous Catalyst for Benzylic sp 3 C-H Oxidation. Chem Asian J 2019; 14:3414-3423. [PMID: 31418537 DOI: 10.1002/asia.201900810] [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: 06/15/2019] [Revised: 08/01/2019] [Indexed: 11/08/2022]
Abstract
Herein, we report a highly chemoselective and efficient heterogeneous MnO2 @Fe3 O4 MNP catalyst for the oxidation of benzylic sp3 C-H group of ethers using TBHP as a green oxidant to afford ester derivatives in high yield under batch/continuous flow module. This catalyst was also effective for the benzylic sp3 C-H group of methylene derivatives to furnish the ketone in high yield which can be easily integrated into continuous flow condition for scale up. The catalyst is fully characterized by spectroscopic techniques and it was found that 0.424 % MnO2 @Fe3 O4 catalyzes the reaction; the magnetic nanoparticles of this catalyst could be easily recovered from the reaction mixture. The recovered catalyst was recycled for twelve cycles without any loss of the catalytic activity. The advantages of MnO2 @Fe3 O4 MNP are its catalytic activity, easy preparation, recovery, and recyclability, gram scale synthesis with a TOF of up to 14.93 h-1 and low metal leaching during the reaction.
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Affiliation(s)
- Akanksha M Pandey
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-, 411008, India
| | - Sandip G Agalave
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-, 411008, India
| | | | - Boopathy Gnanaprakasam
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-, 411008, India
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Nagaraaj P, Vijayakumar V. Oxidation of amine α-carbon to amide: a review on direct methods to access the amide functionality. Org Chem Front 2019. [DOI: 10.1039/c9qo00387h] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A number of methods have been adopted for the synthesis of amides; among these methods, the oxidation of an amine to an amide is growing in interest as a means to prepare this imperative functional group.
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Affiliation(s)
- P. Nagaraaj
- Department of Chemistry
- Anna University
- Chennai-25
- India
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5
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Zhai J, Wang Q, Li Q, Shang B, Rahaman MH, Liang J, Ji J, Liu W. Degradation mechanisms of carbamazepine by δ-MnO 2: Role of protonation of degradation intermediates. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 640-641:981-988. [PMID: 30021331 DOI: 10.1016/j.scitotenv.2018.05.368] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 05/17/2018] [Accepted: 05/29/2018] [Indexed: 06/08/2023]
Abstract
Carbamazepine (CBZ), a widely used antiepileptic drug, is refractory to biological wastewater treatment. Rapid removal of CBZ is possible using synthetic manganese oxide (δ-MnO2) but the removal mechanisms require further investigation. In this study, CBZ degradation by δ-MnO2 was carried out at different pH to further explore the degradation mechanisms. Results show that CBZ degradation by δ-MnO2 was highly pH dependent, and rapid degradation occurred when pH <2.8. Based on the density functional theory calculations, increasing [H+] not only increased the reactivity of δ-MnO2, but also enhanced the secondary reactions of the intermediates. During the degradation process, protonation of CBZ degradation intermediates, instead of CBZ, played an important role. The overall kinetics of CBZ degradation was then described by the retarded first-order model. The initial rate (rinit) in the model between pH 2.0 and 6.2 was determined to be rinit = (2.41 ± 0.51) × 10-3[CBZ]1.21[MnO2]1.07[H+]1.41. This is the first report revealing that protonation of intermediates from CBZ degradation can improve the CBZ oxidation by δ-MnO2. The pathways of CBZ degradation by δ-MnO2 were also proposed. The results of this study provide a new insight into the processing mechanism.
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Affiliation(s)
- Jun Zhai
- School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China.
| | - Quanfeng Wang
- School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China
| | - Qing Li
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400045, PR China
| | - Bo Shang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400045, PR China.
| | - Md Hasibur Rahaman
- School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Dept. of Environmental Science and Technology, Jessore University of Science and Technology, Jessore 7408, Bangladesh
| | - Jialiang Liang
- School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China
| | - Jiucui Ji
- Chongqing Sino French Environmental Excellence R&D Centre Co., Ltd., Chongqing 400021, PR China
| | - Wenbo Liu
- School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China
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Ramana DV, Chandrasekharam M. Copper‐Catalyzed Direct Oxidative α‐Functionalization of Tetrahydroquinoline in Water under Mild Conditions. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800684] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Berger O, Montchamp J. Manganese‐Mediated Homolytic Aromatic Substitution with Phosphinylidenes. CHEM REC 2017; 17:1203-1212. [DOI: 10.1002/tcr.201700021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Olivier Berger
- Department of Chemistry and Biochemistry Texas Christian University, TCU Box 298860 Fort Worth, Texas 76133 USA
| | - Jean‐Luc Montchamp
- Department of Chemistry and Biochemistry Texas Christian University, TCU Box 298860 Fort Worth, Texas 76133 USA
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8
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Inokuma T, Jichu T, Nishida K, Shigenaga A, Otaka A. A Convenient Method for Preparation of α-Imino Carboxylic Acid Derivatives and Application to the Asymmetric Synthesis of Unnatural α-Amino Acid Derivative. Chem Pharm Bull (Tokyo) 2017; 65:573-581. [DOI: 10.1248/cpb.c17-00158] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Tsubasa Inokuma
- Institute of Biomedical Sciences and Graduate School of Pharmaceutical Sciences, Tokushima University
| | - Takahisa Jichu
- Institute of Biomedical Sciences and Graduate School of Pharmaceutical Sciences, Tokushima University
| | - Kodai Nishida
- Institute of Biomedical Sciences and Graduate School of Pharmaceutical Sciences, Tokushima University
| | - Akira Shigenaga
- Institute of Biomedical Sciences and Graduate School of Pharmaceutical Sciences, Tokushima University
| | - Akira Otaka
- Institute of Biomedical Sciences and Graduate School of Pharmaceutical Sciences, Tokushima University
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Shaabani A, Afaridoun H, Shaabani S. Natural hydroxyapatite-supported MnO2: a green heterogeneous catalyst for selective aerobic oxidation of alkylarenes and alcohols. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3505] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ahmad Shaabani
- Faculty of Chemistry, Shahid Beheshti University; GC PO Box 19396-4716 Tehran Iran
| | - Hadi Afaridoun
- Faculty of Chemistry, Shahid Beheshti University; GC PO Box 19396-4716 Tehran Iran
| | - Shabnam Shaabani
- Faculty of Chemistry, Shahid Beheshti University; GC PO Box 19396-4716 Tehran Iran
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10
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A ring closing metathesis-manganese dioxide oxidation sequence for the synthesis of substituted pyrroles. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Shaabani A, Hezarkhani Z, Shaabani S. Cellulose supported manganese dioxide nanosheet catalyzed aerobic oxidation of organic compounds. RSC Adv 2014. [DOI: 10.1039/c4ra11101j] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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12
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Martinez ST, Pinto AC, Glasnov T, Kappe CO. Chemistry of pyrrolizidine alkaloids revisited—semi-synthetic microwave and continuous-flow approaches toward Crotalaria-alkaloids. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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Battilocchio C, Hawkins JM, Ley SV. Mild and selective heterogeneous catalytic hydration of nitriles to amides by flowing through manganese dioxide. Org Lett 2014; 16:1060-3. [PMID: 24495110 DOI: 10.1021/ol403591c] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A sustainable flow chemistry process for the hydration of nitriles, whereby an aqueous solution of the nitrile is passed through a column containing commercially available amorphous manganese dioxide, has been developed. The product is obtained simply by concentration of the output stream without any other workup steps. The protocol described is rapid, robust, reliable, and scalable, and it has been applied to a broad range of substrates, showing a high level of chemical tolerance.
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Affiliation(s)
- Claudio Battilocchio
- Innovative Technology Centre, Department of Chemistry, University of Cambridge , Lensfield Road, CB2 1EW, Cambridge U.K
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14
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Nammalwar B, Fortenberry C, Bunce RA, Lageshetty SK, Ausman KD. Efficient oxidation of arylmethylene compounds using nano-MnO2. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.02.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Direct sp3CH Amination of Nitrogen-Containing Benzoheterocycles Mediated by Visible-Light-Photoredox Catalysts. Chemistry 2012; 18:16473-7. [DOI: 10.1002/chem.201203066] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Indexed: 11/07/2022]
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16
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Dinda BK, Jana AK, Mal D. Anionic [4+3] heteroannulation of 2-azidoacrylates: a modular synthesis of 2-benzazepin-1-ones. Chem Commun (Camb) 2012; 48:3999-4001. [DOI: 10.1039/c2cc30279a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Fichtler R, Neudörfl JM, Jacobi von Wangelin A. Practical three-component synthesis of crowded arenes with donor–acceptor substitution. Org Biomol Chem 2011; 9:7224-36. [DOI: 10.1039/c1ob05984j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Prateeptongkum S, Driller KM, Jackstell R, Beller M. Iron-Catalyzed Carbonylation as a Key Step in the Short and Efficient Syntheses of Himanimide A and B. Chem Asian J 2010; 5:2173-6. [DOI: 10.1002/asia.201000384] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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