1
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Abstract
Organoboron acids are stable, organic-soluble Lewis acids with potential application as catalysts for a wide variety of chemical reactions. In this review, we summarize the utility of boronic and borinic acids, as well as boric acid, as catalysts for organic transformations. Typically, the catalytic processes exploit the Lewis acidity of trivalent boron, enabling the reversible formation of a covalent bond with oxygen. Our focus is on recent developments in the catalysis of dehydration, carbonyl condensation, acylation, alkylation, and cycloaddition reactions. We conclude that organoboron acids have a highly favorable prospectus as the source of new catalysts.
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Affiliation(s)
- Brian J Graham
- Department of Chemistry, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Ronald T Raines
- Department of Chemistry, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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2
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Oxygen transfer reaction of haloalkyl amides catalyzed by phenylboronic acid. Commun Chem 2023; 6:29. [PMID: 36765132 PMCID: PMC9918490 DOI: 10.1038/s42004-023-00824-6] [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: 05/31/2022] [Accepted: 01/30/2023] [Indexed: 02/12/2023] Open
Abstract
Nitrile derivatives are important building blocks in organic synthesis. Herein, we report the serendipitous discovery of an oxygen transfer reaction that produces hydroxyalkyl nitriles from the sequential dehydration and hydrolysis of haloalkyl amides. Product yields of up to 91% were achieved, and the phenylboronic acid was recovered as triphenylboroxine. The triphenylboroxine was reused as a catalyst without any loss of catalytic activity. A probable catalytic pathway was proposed based on control experiments and DFT calculations.
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3
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Yu J, Mateos J, Carraro M. Halloysite Nanotubes as Bimodal Lewis/Brønsted Acid Heterogeneous Catalysts for the Synthesis of Heterocyclic Compounds. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:394. [PMID: 36770356 PMCID: PMC9919349 DOI: 10.3390/nano13030394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Halloysite nanotubes can be used for the preparation of solid catalysts. Owing to their natural availability at low-cost as well as to their large and easy-to-functionalize surface, they can be conveniently activated with mineral acids or derivatized with acidic groups. Nevertheless, the use of HNTs as catalysts in complex transformations is still limited. Herein, we report two strategies to utilize HNT-based materials as solid acidic catalysts for the Biginelli reaction. To this aim, two methods for increasing the number of acidic sites on the HNTs were explored: (i) the treatment with piranha solution (Pir-HNTs) and (ii) the functionalization with phenylboronic acid (in particular with benzene-1,4-diboronic acid: the sample is denoted as HNT-BOA). Interestingly, both strategies enhance the performance of the multicomponent reaction. Pir-HNTs and HNT-BOA show an increased reactivity (72% and 89% yield, respectively) in comparison with pristine HNTs (52%). Additionally, Pir-HNTs can be reused up to five times without significant performance loss. Moreover, the method also displays good reaction scope, as demonstrated by the preparation of 12 different 3,4-dihydropyrimidinones in up to 71% yield. Therefore, the described strategies are promising for enhancing the acidity of the HNTs as catalysts for the organic reaction.
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Affiliation(s)
- Jiaying Yu
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
- College of Chemistry and Environmental Engineering, Shenzhen University, 3688 Nanhai Ave, Shenzhen 518060, China
| | - Javier Mateos
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Mauro Carraro
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
- ITM-CNR, UoS of Padova, Via F. Marzolo 1, 35131 Padova, Italy
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4
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Adhikari P, Bhattacharyya D, Nandi S, Kancharla PK, Das A. Reductive Alkylation of Quinolines to N-Alkyl Tetrahydroquinolines Catalyzed by Arylboronic Acid. Org Lett 2021; 23:2437-2442. [PMID: 33711233 DOI: 10.1021/acs.orglett.1c00302] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A boronic acid catalyzed one-pot tandem reduction of quinolines to tetrahydroquinolines followed by reductive alkylation by the aldehyde has been demonstrated. This step-economcial synthesis of N-alkyl tetrahydroquinolines has been achieved directly from readily available quinolines, aldehydes, and Hantzsch ester under mild reaction conditions. The mechanistic study demonstrates the unique behavior of organoboron catalysts as both Lewis acids and hydrogen-bond donors.
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Affiliation(s)
- Priyanka Adhikari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Dipanjan Bhattacharyya
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Sekhar Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Pavan K Kancharla
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Animesh Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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5
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Vijayapritha S, Viswanathamurthi P. New half-sandwich (η6-p-cymene)ruthenium(II) complexes with benzothiazole hydrazone Schiff base ligand: Synthesis, structural characterization and catalysis in transamidation of carboxamide with primary amines. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121555] [Citation(s) in RCA: 4] [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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6
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Zhang S, Lebœuf D, Moran J. Brønsted Acid and H‐Bond Activation in Boronic Acid Catalysis. Chemistry 2020; 26:9883-9888. [DOI: 10.1002/chem.202001902] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Indexed: 01/15/2023]
Affiliation(s)
- Shaofei Zhang
- University of Strasbourg CNRS ISIS UMR 7006 67000 Strasbourg France
| | - David Lebœuf
- University of Strasbourg CNRS ISIS UMR 7006 67000 Strasbourg France
| | - Joseph Moran
- University of Strasbourg CNRS ISIS UMR 7006 67000 Strasbourg France
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7
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Hayama N, Kobayashi Y, Sekimoto E, Miyazaki A, Inamoto K, Kimachi T, Takemoto Y. A solvent-dependent chirality-switchable thia-Michael addition to α,β-unsaturated carboxylic acids using a chiral multifunctional thiourea catalyst. Chem Sci 2020; 11:5572-5576. [PMID: 32874501 PMCID: PMC7444369 DOI: 10.1039/d0sc01729a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/14/2020] [Indexed: 01/19/2023] Open
Abstract
An asymmetric thia-Michael addition of arylthiols to α,β-unsaturated carboxylic acids using a thiourea catalyst that bears arylboronic acid and tertiary amine moieties is reported.
An asymmetric thia-Michael addition of arylthiols to α,β-unsaturated carboxylic acids using a thiourea catalyst that bears arylboronic acid and tertiary amine moieties is reported. Both enantiomers of the Michael adducts can be obtained in high enantioselectivity and good yield merely by changing the solvent. The origin of the chirality switch in the products was examined in each solvent via spectroscopic analyses.
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Affiliation(s)
- Noboru Hayama
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan . .,School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Yusuke Kobayashi
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan .
| | - Eriko Sekimoto
- School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Anna Miyazaki
- School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Kiyofumi Inamoto
- School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Tetsutaro Kimachi
- School of Pharmacy and Pharmaceutical Sciences , Mukogawa Women's University , 11-68, 9-Bancho, Koshien , Nishinomiya , Hyogo 663-8179 , Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku , Kyoto 606-8501 , Japan .
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8
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Oda S, Ueura K, Kawakami B, Hatakeyama T. Multiple Electrophilic C–H Borylation of Arenes Using Boron Triiodide. Org Lett 2020; 22:700-704. [DOI: 10.1021/acs.orglett.9b04483] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Kenta Ueura
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Bungo Kawakami
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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9
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Yao H, Liu J, Wang C. Boronic acid-catalysed C-3 selective ring opening of 3,4-epoxy alcohols with thiophenols and thiols. Org Biomol Chem 2019; 17:1901-1905. [PMID: 30259944 DOI: 10.1039/c8ob02141d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this protocol we described a boronic acid-catalysed C-3 selective ring opening of 3,4-epoxy alcohols with thiophenols and thiols as nucleophiles. This diastereo- and enantiospecific reaction provides an efficient entry to prepare a variety of hydroxyl sulfides. Through the directing effect of the hydroxyl group, nucleophilic attack on the C-3 position of the epoxide moiety is favoured. It can be rationalized in a proposed transition state, in which the boronic acid catalyst tethers both epoxides and S-nucleophiles.
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Affiliation(s)
- Hongqing Yao
- Department of Chemistry, Center for Excellence in Molecular Synthesis, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 20237, P. R. China.
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10
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Abstract
Although boronic acids are recognized primarily for their utility as reagents in transition metal-catalyzed transformations, other applications are emerging, including their use as reaction catalysts.
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Affiliation(s)
- Dennis G. Hall
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
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11
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Zhu D, LaFortune JHW, Melen RL, Stephan DW. Electrophilic boron carboxylate and phosphinate complexes. Dalton Trans 2019; 48:2038-2045. [DOI: 10.1039/c8dt04818e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A series of carboxylic acid derivatives of the form [RC(O)OB(C6F5)]2O, (R = Tol, Ph, C6F5, Me2BrC, Me) were prepared with the concurrent reduction to the corresponding aldehyde. The mechanism is proposed to proceed via cyclic eight-membered ring species.
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Affiliation(s)
- Diya Zhu
- Department of Chemistry
- University of Toronto
- Canada
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12
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Siddiki SMAH, Rashed MN, Ali MA, Toyao T, Hirunsit P, Ehara M, Shimizu K. Lewis Acid Catalysis of Nb
2
O
5
for Reactions of Carboxylic Acid Derivatives in the Presence of Basic Inhibitors. ChemCatChem 2018. [DOI: 10.1002/cctc.201801239] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | | | - Md. Ayub Ali
- Department of Chemistry Bangladesh University of Engineering and Technology (BUET) Dhaka- 1000 Bangladesh
| | - Takashi Toyao
- Institute for Catalysis Hokkaido University Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University Kyoto 615-8520 Japan
| | - Pussana Hirunsit
- National Nanotechnology Center National Science and Technology Development Agency Pathum Thani 12120 Thailand
| | - Masahiro Ehara
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University Kyoto 615-8520 Japan
- Institute for Molecular Science Aichi 444-8585 Japan
| | - Ken‐ichi Shimizu
- Institute for Catalysis Hokkaido University Sapporo 001-0021 Japan
- Elements Strategy Initiative for Catalysts and Batteries Kyoto University Kyoto 615-8520 Japan
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13
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Xu WL, Zhang H, Hu YL, Yang H, Chen J, Zhou L. Metal-Free Dehydrogenative Diels-Alder Reactions of Prenyl Derivatives with Dienophiles via a Thermal Reversible Process. Org Lett 2018; 20:5774-5778. [PMID: 30182721 DOI: 10.1021/acs.orglett.8b02469] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An efficient dehydrogenative Diels-Alder reaction of prenyl derivatives with dienophiles has been developed. The reaction exhibits broad substrate scope and provides efficient access to cyclohexene derivatives with good to excellent yields. A reasonable mechanism involving a metal-free thermal reversible process is proposed.
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Affiliation(s)
- Wen-Lei Xu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P.R. China
| | - Heng Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P.R. China
| | - Yu-Long Hu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P.R. China
| | - Hui Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P.R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P.R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P.R. China
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14
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Hayama N, Kuramoto R, Földes T, Nishibayashi K, Kobayashi Y, Pápai I, Takemoto Y. Mechanistic Insight into Asymmetric Hetero-Michael Addition of α,β-Unsaturated Carboxylic Acids Catalyzed by Multifunctional Thioureas. J Am Chem Soc 2018; 140:12216-12225. [PMID: 30215516 DOI: 10.1021/jacs.8b07511] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Carboxylic acids and their corresponding carboxylate anions are generally utilized as Brønsted acids/bases and oxygen nucleophiles in organic synthesis. However, a few asymmetric reactions have used carboxylic acids as electrophiles. Although chiral thioureas bearing both arylboronic acid and tertiary amine were found to promote the aza-Michael addition of BnONH2 to α,β-unsaturated carboxylic acids with moderate to good enantioselectivities, the reaction mechanism remains to be clarified. Detailed investigation of the reaction using spectroscopic analysis and kinetic studies identified tetrahedral borate complexes, comprising two carboxylate anions, as reaction intermediates. We realized a dramatic improvement in product enantioselectivity with the addition of 1 equiv of benzoic acid. In this aza-Michael reaction, the boronic acid not only activates the carboxylate ligand as a Lewis acid, together with the thiourea NH-protons, but also functions as a Brønsted base through a benzoyloxy anion to activate the nucleophile. Moreover, molecular sieves were found to play an important role in generating the ternary borate complexes, which were crucial for obtaining high enantioselectivity as demonstrated by DFT calculations. We also designed a new thiourea catalyst for the intramolecular oxa-Michael addition to suppress another catalytic pathway via a binary borate complex using steric hindrance between the catalyst and substrate. Finally, to demonstrate the synthetic versatility of both hetero-Michael additions, we used them to accomplish the asymmetric synthesis of key intermediates in pharmaceutically important molecules, including sitagliptin and α-tocopherol.
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Affiliation(s)
- Noboru Hayama
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Ryuta Kuramoto
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Tamás Földes
- Institute of Organic Chemistry, Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar tudósok körútja 2 , H-1117 Budapest , Hungary
| | - Kazuya Nishibayashi
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Yusuke Kobayashi
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Imre Pápai
- Institute of Organic Chemistry, Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar tudósok körútja 2 , H-1117 Budapest , Hungary
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
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15
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Affiliation(s)
- Jiawei Liu
- Department of Chemistry, Center for Excellence in Molecular Synthesis, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 20237, People’s Republic of China
| | - Hongqing Yao
- Department of Chemistry, Center for Excellence in Molecular Synthesis, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 20237, People’s Republic of China
| | - Chuan Wang
- Department of Chemistry, Center for Excellence in Molecular Synthesis, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 20237, People’s Republic of China
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16
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Sawant DN, Bagal DB, Ogawa S, Selvam K, Saito S. Diboron-Catalyzed Dehydrative Amidation of Aromatic Carboxylic Acids with Amines. Org Lett 2018; 20:4397-4400. [PMID: 30020789 DOI: 10.1021/acs.orglett.8b01480] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Tetrakis(dimethylamido)diboron and tetrahydroxydiboron are herein reported as new catalysts for the synthesis of aryl amides by catalytic condensation of aromatic carboxylic acids with amines. The developed protocol is both simple and highly efficient over a broad range of substrates. This method thus represents an attractive approach for the use of diboron catalysts in the synthesis of amides without having to resort to stoichiometric or additional dehydrating agents.
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17
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Arkhipenko S, Sabatini MT, Batsanov AS, Karaluka V, Sheppard TD, Rzepa HS, Whiting A. Mechanistic insights into boron-catalysed direct amidation reactions. Chem Sci 2018; 9:1058-1072. [PMID: 29675153 PMCID: PMC5890798 DOI: 10.1039/c7sc03595k] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 12/23/2017] [Indexed: 11/27/2022] Open
Abstract
The generally accepted monoacyloxyboron mechanism of boron-catalysed direct amidation is brought into question in this study, and new alternatives are proposed.
The generally accepted monoacyloxyboron mechanism of boron-catalysed direct amidation is brought into question in this study, and new alternatives are proposed. We have carried out a detailed investigation of boron-catalysed amidation reactions, through study of the interaction between amines/carboxylic acids and borinic acids, boronic acids and boric acid, and have isolated and characterised by NMR/X-ray crystallography many of the likely intermediates present in catalytic amidation reactions. Rapid reaction between amines and boron compounds was observed in all cases, and it is proposed that such boron–nitrogen interactions are highly likely to take place in catalytic amidation reactions. These studies also clearly show that borinic acids are not competent catalysts for amidation, as they either form unreactive amino-carboxylate complexes, or undergo protodeboronation to give boronic acids. It therefore seems that at least three free coordination sites on the boron atom are necessary for amidation catalysis to occur. However, these observations are not consistent with the currently accepted ‘mechanism’ for boron-mediated amidation reactions involving nucleophilic attack of an amine onto a monomeric acyloxyboron intermediate, and as a result of our observations and theoretical modelling, alternative proposed mechanisms are presented for boron-mediated amidation reactions. These are likely to proceed via the formation of a dimeric B–X–B motif (X = O, NR), which is uniquely able to provide activation of the carboxylic acid, whilst orchestrating the delivery of the amine nucleophile to the carbonyl group. Quantum mechanical calculations of catalytic cycles at the B3LYP+D3/Def2-TZVPP level (solvent = CH2Cl2) support the proposal of several closely related potential pathways for amidation, all of which are likely to be lower in energy than the currently accepted mechanism.
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Affiliation(s)
- Sergey Arkhipenko
- Centre for Sustainable Chemical Processes , Department of Chemistry , Durham University , Science Site , South Road , Durham , DH1 3LE , UK .
| | - Marco T Sabatini
- Department of Chemistry , University College London , 20 Gordon Street , London , WC1H 0AJ , UK
| | - Andrei S Batsanov
- Department of Chemistry , Durham University , Science Site , South Road , Durham , DH1 3LE , UK
| | - Valerija Karaluka
- Department of Chemistry , University College London , 20 Gordon Street , London , WC1H 0AJ , UK
| | - Tom D Sheppard
- Department of Chemistry , University College London , 20 Gordon Street , London , WC1H 0AJ , UK
| | - Henry S Rzepa
- Department of Chemistry , Imperial College London , South Kensington Campus , London , SW7 2AZ , UK
| | - Andrew Whiting
- Centre for Sustainable Chemical Processes , Department of Chemistry , Durham University , Science Site , South Road , Durham , DH1 3LE , UK .
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18
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Wang K, Lu Y, Ishihara K. The ortho-substituent on 2,4-bis(trifluoromethyl)phenylboronic acid catalyzed dehydrative condensation between carboxylic acids and amines. Chem Commun (Camb) 2018; 54:5410-5413. [DOI: 10.1039/c8cc02558d] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The ortho-substituent of boronic acid plays a key role in preventing the coordination of amines to the boron atom.
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Affiliation(s)
- Ke Wang
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Yanhui Lu
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
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19
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Kawasumi R, Narita S, Miyamoto K, Tominaga KI, Takita R, Uchiyama M. One-step Conversion of Levulinic Acid to Succinic Acid Using I 2/t-BuOK System: The Iodoform Reaction Revisited. Sci Rep 2017; 7:17967. [PMID: 29269768 PMCID: PMC5740180 DOI: 10.1038/s41598-017-17116-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 10/20/2017] [Indexed: 11/25/2022] Open
Abstract
The iodoform reaction has long been used as a qualitative test for acetyl and/or ethanol units in organic molecules. However, its synthetic applications are quite limited. Here, we describe a tuned iodoform reaction for oxidative demethylation reaction with I2 and t-BuOK in t-BuOH, in which in situ-generated t-BuOI serves as the chemoselective iodinating agent. This system enables one-step conversion of levulinic acid to succinic acid, a major four-carbon chemical feedstock. This oxidative demethylation is also applicable to other compounds containing an acetyl group/ethanol unit, affording the corresponding carboxylic acids in a selective manner.
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Affiliation(s)
- Ryosuke Kawasumi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shodai Narita
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kazunori Miyamoto
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Ken-Ichi Tominaga
- National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Ryo Takita
- Advanced Elements Chemistry Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
- Advanced Elements Chemistry Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan.
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20
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Verdelet T, Ward RM, Hall DG. Direct Sulfonamidation of Primary and Secondary Benzylic Alcohols Catalyzed by a Boronic Acid/Oxalic Acid System. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700621] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tristan Verdelet
- Department of Chemistry; Centennial Centre for Interdisciplinary Science; University of Alberta; T6G 2G2 Edmonton Alberta Canada
| | - Robert M. Ward
- Department of Chemistry; Centennial Centre for Interdisciplinary Science; University of Alberta; T6G 2G2 Edmonton Alberta Canada
| | - Dennis G. Hall
- Department of Chemistry; Centennial Centre for Interdisciplinary Science; University of Alberta; T6G 2G2 Edmonton Alberta Canada
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21
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Lu Y, Wang K, Ishihara K. Design of Boronic Acid-Base Complexes as Reusable Homogeneous Catalysts in Dehydrative Condensations between Carboxylic Acids and Amines. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700194] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yanhui Lu
- Graduate School of Engineering; Nagoya University; B2−3(611), Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Ke Wang
- Graduate School of Engineering; Nagoya University; B2−3(611), Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering; Nagoya University; B2−3(611), Furo-cho, Chikusa Nagoya 464-8603 Japan
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22
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Garrett GE, Diaz DB, Yudin AK, Taylor MS. Reversible covalent interactions of β-aminoboronic acids with carbohydrate derivatives. Chem Commun (Camb) 2017; 53:1809-1812. [PMID: 28106188 DOI: 10.1039/c6cc09640a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
β-Aminoalkylboronic acids are capable of binding to carbohydrate derivatives through reversible covalent interactions. An anthracene-bearing β-aminoboronic acid has been synthesized, enabling determinations of association constants for binding of sugars by fluorescence spectroscopy. The diol-binding properties of β-aminoboronic acids are also useful in catalysis: one such compound displays remarkably high activity for regioselective O-acylation of a pyranoside derivative.
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Affiliation(s)
- Graham E Garrett
- Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada.
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23
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24
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Venkatesha NJ. Green synthesis of Cyclic imides by Amidation and Cyclisation using Bronsted-Lewis acidic montmorillonite clays. ChemistrySelect 2016. [DOI: 10.1002/slct.201600225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- N. J. Venkatesha
- Chemistry Research Center; Bangalore Institute of Technology; K.R Road, V.V Pura Bengaluru 560004
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25
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Xiao YH, Shao Y, Ye XX, Cui H, Wang DL, Zhou XH, Sun SL, Cheng L. Microporous aromatic polyimides derived from triptycene-based dianhydride. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2015.12.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Xiao YH, Shao Y, Ye XX, Cui H, Wang DL, Zhou XH, Sun SL, Cheng L. Microporous aromatic polyimides derived from triptycene-based dianhydride. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2015.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Ishihara K, Lu Y. Boronic acid-DMAPO cooperative catalysis for dehydrative condensation between carboxylic acids and amines. Chem Sci 2015; 7:1276-1280. [PMID: 29910884 PMCID: PMC5975839 DOI: 10.1039/c5sc03761a] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 11/02/2015] [Indexed: 01/29/2023] Open
Abstract
Arylboronic acid and DMAPO cooperatively catalyse the dehydrative condensation reaction between carboxylic acids and amines to give the corresponding amides under azeotropic reflux conditions. This cooperative use is much more effective than their individual use as catalysts.
Arylboronic acid and 4-(N,N-dimethylamino)pyridine N-oxide (DMAPO) cooperatively catalyse the dehydrative condensation reaction between carboxylic acids and amines to give the corresponding amides under azeotropic reflux conditions. This cooperative use is much more effective than their individual use as catalysts, and chemoselectively promotes the amide condensation of (poly)conjugated carboxylic acids. The present method is practical and scalable, and has been applied to the synthesis of sitagliptin and a drug candidate.
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Affiliation(s)
- Kazuaki Ishihara
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho, Chikusa , Nagoya 464-8603 , Japan . .,JST , CREST , B2-3(611), Furo-cho, Chikusa , Nagoya 464-8603 , Japan
| | - Yanhui Lu
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho, Chikusa , Nagoya 464-8603 , Japan .
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28
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Srinivas M, Hudwekar AD, Venkateswarlu V, Reddy GL, Kumar KA, Vishwakarma RA, Sawant SD. A metal-free approach for transamidation of amides with amines in aqueous media. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.06.052] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Mo X, Yakiwchuk J, Dansereau J, McCubbin JA, Hall DG. Unsymmetrical Diarylmethanes by Ferroceniumboronic Acid Catalyzed Direct Friedel–Crafts Reactions with Deactivated Benzylic Alcohols: Enhanced Reactivity due to Ion-Pairing Effects. J Am Chem Soc 2015; 137:9694-703. [DOI: 10.1021/jacs.5b05076] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaobin Mo
- Department
of Chemistry, Centennial Center for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Joshua Yakiwchuk
- Department
of Chemistry, Centennial Center for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Julien Dansereau
- Department
of Chemistry, Centennial Center for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - J. Adam McCubbin
- Department
of Chemistry, University of Winnipeg, Winnipeg, Manitoba R3B 2E9, Canada
| | - Dennis G. Hall
- Department
of Chemistry, Centennial Center for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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30
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Adamczyk-Woźniak A, Borys KM, Sporzyński A. Recent Developments in the Chemistry and Biological Applications of Benzoxaboroles. Chem Rev 2015; 115:5224-47. [DOI: 10.1021/cr500642d] [Citation(s) in RCA: 154] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | - Krzysztof M. Borys
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Andrzej Sporzyński
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
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31
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Kathiravan S, Ghosh S, Hogarth G, Nicholls IA. Copper catalysed amidation of aryl halides through chelation assistance. Chem Commun (Camb) 2015; 51:4834-7. [DOI: 10.1039/c4cc09940k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using 8-aminoquinoline-based alkyl and aryl carboxamides, the direct N-arylation was achieved in good yields in the presence of a copper catalyst via chelation-assisted reaction.
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Affiliation(s)
- Subban Kathiravan
- Bioorganic & Biophysical Chemistry Laboratory
- Linnaeus University Centre for Biomaterials Chemistry
- Linnæus University
- SE-391 82 Kalmar
- Sweden
| | | | | | - Ian A. Nicholls
- Bioorganic & Biophysical Chemistry Laboratory
- Linnaeus University Centre for Biomaterials Chemistry
- Linnæus University
- SE-391 82 Kalmar
- Sweden
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32
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33
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Cao KS, Bian HX, Zheng WH. Mild arylboronic acid catalyzed selective [4 + 3] cycloadditions: access to cyclohepta[b]benzofurans and cyclohepta[b]indoles. Org Biomol Chem 2015; 13:6449-52. [DOI: 10.1039/c5ob00653h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The first example of arylboronic acid catalyzed [4 + 3] cycloaddition reaction is reported.
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Affiliation(s)
- Kou-Sen Cao
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Hong-Xu Bian
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Wen-Hua Zheng
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
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34
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Ali MA, Siddiki SMAH, Kon K, Hasegawa J, Shimizu KI. Versatile and sustainable synthesis of cyclic imides from dicarboxylic acids and amines by Nb2O5 as a base-tolerant heterogeneous Lewis acid catalyst. Chemistry 2014; 20:14256-60. [PMID: 25225033 DOI: 10.1002/chem.201404538] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Indexed: 11/05/2022]
Abstract
Catalytic condensation of dicarboxylics acid and amines without excess amount of activating reagents is the most atom-efficient but unprecedented synthetic method of cyclic imides. Here we present the first general catalytic method, proceeding selectively and efficiently in the presence of a commercial Nb2 O5 as a reusable and base-tolerant heterogeneous Lewis acid catalyst. The method is effective for the direct synthesis of pharmaceutically or industrially important cyclic imides, such as phensuximide, N-hydroxyphthalimide (NHPI), and unsubstituted cyclic imides from dicarboxylic acid or anhydrides with amines, hydroxylamine, or ammonia.
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Affiliation(s)
- Md Ayub Ali
- Catalysis Research Center, Hokkaido University, N-21, W-10, Sapporo 001-0021 (Japan), Fax: (+81) 11-706-9163
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35
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Azuma T, Murata A, Kobayashi Y, Inokuma T, Takemoto Y. A Dual Arylboronic Acid–Aminothiourea Catalytic System for the Asymmetric Intramolecular Hetero-Michael Reaction of α,β-Unsaturated Carboxylic Acids. Org Lett 2014; 16:4256-9. [DOI: 10.1021/ol501954r] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Takumi Azuma
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Akihiro Murata
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yusuke Kobayashi
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Tsubasa Inokuma
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
- Institute
of Health Biosciences and Graduate School of Pharmaceutical Sciences, The University of Tokushima, Shomachi, Tokushima 770-8505, Japan
| | - Yoshiji Takemoto
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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36
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Grabow K, Bentrup U. Homogeneous Catalytic Processes Monitored by Combined in Situ ATR-IR, UV–Vis, and Raman Spectroscopy. ACS Catal 2014. [DOI: 10.1021/cs500363n] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kathleen Grabow
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Ursula Bentrup
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
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37
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Yang X, Fan L, Xue Y. Mechanistic insights into l-proline-catalyzed transamidation of carboxamide with benzylamine from density functional theory calculations. RSC Adv 2014. [DOI: 10.1039/c4ra04105d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Density functional theory was used to study mechanism of transamidation of carboxamides with amines catalysed by l-proline in three different solvents.
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Affiliation(s)
- Xin Yang
- Key Laboratory of Green Chemistry and Technology in Ministry of Education
- College of Chemistry Sichuan University
- Chengdu 610064, P.R. China
| | - Linlin Fan
- Key Laboratory of Green Chemistry and Technology in Ministry of Education
- College of Chemistry Sichuan University
- Chengdu 610064, P.R. China
| | - Ying Xue
- Key Laboratory of Green Chemistry and Technology in Ministry of Education
- College of Chemistry Sichuan University
- Chengdu 610064, P.R. China
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38
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Li Y, Molina de La Torre JA, Grabow K, Bentrup U, Junge K, Zhou S, Brückner A, Beller M. Selective Reduction of Amides to Amines by Boronic Acid Catalyzed Hydrosilylation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304495] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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Li Y, Molina de La Torre JA, Grabow K, Bentrup U, Junge K, Zhou S, Brückner A, Beller M. Selective Reduction of Amides to Amines by Boronic Acid Catalyzed Hydrosilylation. Angew Chem Int Ed Engl 2013; 52:11577-80. [DOI: 10.1002/anie.201304495] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 08/09/2013] [Indexed: 11/07/2022]
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40
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Yamashita R, Sakakura A, Ishihara K. Primary alkylboronic acids as highly active catalysts for the dehydrative amide condensation of α-hydroxycarboxylic acids. Org Lett 2013; 15:3654-7. [PMID: 23802908 DOI: 10.1021/ol401537f] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Primary alkylboronic acids such as methylboronic acid and butylboronic acid are highly active catalysts for the dehydrative amide condensation of α-hydroxycarboxylic acids. The catalytic activities of these primary alkylboronic acids are much higher than those of the previously reported arylboronic acids. The present method was easily applied to a large-scale synthesis, and 14 g of an amide was obtained in a single reaction.
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Affiliation(s)
- Risa Yamashita
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
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41
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Dimitrijević E, Taylor MS. Organoboron Acids and Their Derivatives as Catalysts for Organic Synthesis. ACS Catal 2013. [DOI: 10.1021/cs4000848] [Citation(s) in RCA: 129] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Elena Dimitrijević
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S
3H6, Canada
| | - Mark S. Taylor
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S
3H6, Canada
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42
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Rao SN, Mohan DC, Adimurthy S. l-Proline: An Efficient Catalyst for Transamidation of Carboxamides with Amines. Org Lett 2013; 15:1496-9. [DOI: 10.1021/ol4002625] [Citation(s) in RCA: 131] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Sadu Nageswara Rao
- CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Darapaneni Chandra Mohan
- CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
| | - Subbarayappa Adimurthy
- CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, Gujarat, India
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43
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Zheng H, Lejkowski M, Hall DG. Mild boronic acid catalyzed Nazarov cyclization of divinyl alcohols in tandem with Diels–Alder cycloaddition. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.10.100] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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44
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Nguyen TB, Sorres J, Tran MQ, Ermolenko L, Al-Mourabit A. Boric Acid: A Highly Efficient Catalyst for Transamidation of Carboxamides with Amines. Org Lett 2012; 14:3202-5. [DOI: 10.1021/ol301308c] [Citation(s) in RCA: 157] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Thanh Binh Nguyen
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Jonathan Sorres
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Minh Quan Tran
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Ludmila Ermolenko
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Ali Al-Mourabit
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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45
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Double Molecular Recognition with Aminoorganoboron Complexes: Selective Alcoholysis of β-Dicarbonyl Derivatives. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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46
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Zheng H, Ghanbari S, Nakamura S, Hall DG. Boronic Acid Catalysis as a Mild and Versatile Strategy for Direct Carbo- and Heterocyclizations of Free Allylic Alcohols. Angew Chem Int Ed Engl 2012; 51:6187-90. [DOI: 10.1002/anie.201201620] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Indexed: 11/06/2022]
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47
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Zheng H, Ghanbari S, Nakamura S, Hall DG. Boronic Acid Catalysis as a Mild and Versatile Strategy for Direct Carbo- and Heterocyclizations of Free Allylic Alcohols. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201620] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Grosjean C, Parker J, Thirsk C, Wright AR. Intensified Azeotropic Distillation: A Strategy for Optimizing Direct Amidation. Org Process Res Dev 2012. [DOI: 10.1021/op300058f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Christophe Grosjean
- LyraChem Ltd, Saint Thomas Street Stables, Saint Thomas Street,
Newcastle-upon-Tyne,
NE1 4LE, U.K
| | - Julie Parker
- School of
Chemical Engineering
and Advanced Materials, Merz Court, Newcastle University, Newcastle-upon-Tyne, NE1 7RU, U.K
| | - Carl Thirsk
- LyraChem Ltd, Saint Thomas Street Stables, Saint Thomas Street,
Newcastle-upon-Tyne,
NE1 4LE, U.K
| | - Allen R. Wright
- School of
Chemical Engineering
and Advanced Materials, Merz Court, Newcastle University, Newcastle-upon-Tyne, NE1 7RU, U.K
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49
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Oishi S, Saito S. Double Molecular Recognition with Aminoorganoboron Complexes: Selective Alcoholysis of β-Dicarbonyl Derivatives. Angew Chem Int Ed Engl 2012; 51:5395-9. [DOI: 10.1002/anie.201200304] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Revised: 02/23/2012] [Indexed: 11/06/2022]
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50
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Yang HM, Li L, Li F, Jiang KZ, Shang JY, Lai GQ, Xu LW. Silicon-Based Lewis Acid Assisted Cinchona Alkaloid Catalysis: Highly Enantioselective Aza-Michael Reaction under Solvent-Free Conditions. Org Lett 2011; 13:6508-11. [DOI: 10.1021/ol202803b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hua-Meng Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Li Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Fei Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Ke-Zhi Jiang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Jun-Yan Shang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Guo-Qiao Lai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
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