1
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Sennari G, Yamagishi H, Sarpong R. Remote C-H Amination and Alkylation of Camphor at C8 through Hydrogen-Atom Abstraction. J Am Chem Soc 2024; 146:7850-7857. [PMID: 38447162 DOI: 10.1021/jacs.4c01351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Camphor continues to serve as a versatile chiral building block for chemical synthesis. We have developed a novel method to functionalize the camphor skeleton at C8 using an intramolecular hydrogen atom abstraction. The key advance involves the use of a camphor-derived aminonitrile, which is converted to the corresponding nitrogen-centered radical under photoredox conditions to effect the 1,5-hydrogen atom transfer at C8. The resulting carbon-centered radical at C8 was utilized in a C-H amination to access topologically complex proline derivatives. Furthermore, the total synthesis of several sesquiterpenoids was accomplished by engaging the radical generated at C8 in alkylation reactions.
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Affiliation(s)
- Goh Sennari
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- O̅mura Satoshi Memorial Institute and Graduate School of Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Hiroki Yamagishi
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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2
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Cai M, Ma J, Wu Q, Lin A, Yao H. Enantioselective Syntheses of 2-Azabicyclo[2.2.1]heptanes via Brønsted Acid Catalyzed Ring-Opening of meso-Epoxides. Org Lett 2022; 24:8791-8795. [PMID: 36414324 DOI: 10.1021/acs.orglett.2c03529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A chiral phosphoric acid-catalyzed ring-opening of meso-epoxides was developed. A range of 2-azabicyclo[2.2.1]heptanes were obtained in high yields with excellent enantioselectivities. In addition, the hydroxyl and amide groups in the products provided handles for further derivatization.
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Affiliation(s)
- Min Cai
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Jiao Ma
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Qimin Wu
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Hequan Yao
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
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3
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Garsi JB, Guggari S, Deis T, Ma M, Hocine S, Hanessian S. 2-Oxa-5-azabicyclo[2.2.1]heptane as a Platform for Functional Diversity: Synthesis of Backbone-Constrained γ-Amino Acid Analogues. J Org Chem 2022; 87:11261-11273. [PMID: 35900070 DOI: 10.1021/acs.joc.2c01338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We communicate a versatile synthetic approach to C-3 disubstituted 2-oxa-5-azabicyclo[2.2.1]heptanes as carbon-atom bridged morpholines, starting with 4R-hydroxy-l-proline as a chiron. Attaching an acetic acid moiety on the C-3 carbon of the 2-oxa-5-azabicyclo[2.2.1]heptane core reveals the framework of an embedded γ-amino butyric acid (GABA). Variations in the nature of the substituent on the tertiary C-3 atom with different alkyls or aryls led to backbone-constrained analogues of the U.S. Food and Drug Administration-approved drugs baclofen and pregabalin.
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Affiliation(s)
- Jean-Baptiste Garsi
- Department of Chemistry, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3, Canada
| | - Solène Guggari
- Department of Chemistry, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3, Canada
| | - Thomas Deis
- Department of Chemistry, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3, Canada
| | - Myles Ma
- Department of Chemistry, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3, Canada
| | - Sofiane Hocine
- Department of Chemistry, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3, Canada
| | - Stephen Hanessian
- Department of Chemistry, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3, Canada
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4
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Lazib Y, Retailleau P, Saget T, Darses B, Dauban P. Asymmetric Synthesis of Enantiopure Pyrrolidines by C(sp 3 )-H Amination of Hydrocarbons. Angew Chem Int Ed Engl 2021; 60:21708-21712. [PMID: 34329511 DOI: 10.1002/anie.202107898] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Indexed: 11/07/2022]
Abstract
The asymmetric synthesis of enantiopure pyrrolidines is reported via a streamlined strategy relying on two sequential C-H functionalizations of simple hydrocarbons. The first step is a regio- and stereoselective catalytic nitrene C-H insertion. Then, a subsequent diastereoselective cyclization involving a 1,5-hydrogen atom transfer (HAT) from a N-centered radical leads to the formation of pyrrolidines that can then be converted to their free NH-derivatives.
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Affiliation(s)
- Yanis Lazib
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Pascal Retailleau
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Tanguy Saget
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Benjamin Darses
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France.,Université Grenoble Alpes, Département de Chimie Moléculaire, CNRS UMR-5250, 38058, Grenoble, France
| | - Philippe Dauban
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France
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5
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Lazib Y, Retailleau P, Saget T, Darses B, Dauban P. Asymmetric Synthesis of Enantiopure Pyrrolidines by C(sp
3
)−H Amination of Hydrocarbons. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yanis Lazib
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Pascal Retailleau
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Tanguy Saget
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Benjamin Darses
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
- Université Grenoble Alpes Département de Chimie Moléculaire CNRS UMR-5250 38058 Grenoble France
| | - Philippe Dauban
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
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6
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Maddess ML, Cleator E, Morimoto M, Goodyear A, Dieguez-Vazquez A, Gibb A, Kirtley A, Wang J, Qi J, Kong L, Alam M, Keen S, Oliver SF, Wen X, Lam YH. Development of a Stereoselective Synthesis of (1 R,4 R)- and (1 S,4 S)-2-Oxa-5-azabicyclo[2.2.2]octane. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew L. Maddess
- Process Research and Development, Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | - Ed Cleator
- Process Research and Development, Merck Sharp & Dohme Ltd, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, U.K
| | - Mariko Morimoto
- Process Research and Development, Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | - Adrian Goodyear
- Process Research and Development, Merck Sharp & Dohme Ltd, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, U.K
| | - Alejandro Dieguez-Vazquez
- Process Research and Development, Merck Sharp & Dohme Ltd, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, U.K
| | - Andrew Gibb
- Process Research and Development, Merck Sharp & Dohme Ltd, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, U.K
| | - Andy Kirtley
- Process Research and Development, Merck Sharp & Dohme Ltd, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, U.K
| | - Jie Wang
- Pharmaron Beijing, Co. Ltd., No. 6 TaiHe Road, BDA, Beijing 100176, China
| | - Ji Qi
- Process Research and Development, Merck & Co., Inc., P.O. Box 2000, Rahway, New Jersey 07065, United States
| | - Lingzhu Kong
- Pharmaron Beijing, Co. Ltd., No. 6 TaiHe Road, BDA, Beijing 100176, China
| | - Mahbub Alam
- Process Research and Development, Merck Sharp & Dohme Ltd, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, U.K
| | - Stephen Keen
- Process Research and Development, Merck Sharp & Dohme Ltd, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, U.K
| | - Steven F. Oliver
- Process Research and Development, Merck Sharp & Dohme Ltd, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, U.K
| | - Xin Wen
- Process Research and Development, Merck & Co., Inc., Boston, Massachusetts 02115, United States
| | - Yu-Hong Lam
- Computational and Structural Chemistry, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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7
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Intramolecular [3+2]-cycloaddition of salicylaldehydes-based cyclic azomethine imines to access novel tetrahydrochromeno[4,3-c]pyrazolo[1,2-a]pyrazol-9-ones. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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8
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Shcherbakova V, Dibchak D, Snisarenko M, Skalenko Y, Denisenko AV, Kuznetsova AS, Mykhailiuk PK. Bicyclic Piperidines via [2 + 2] Photocycloaddition. J Org Chem 2021; 86:2200-2209. [PMID: 33211487 DOI: 10.1021/acs.joc.0c02355] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A synthetic strategy to fused bicyclic piperidines-building blocks for medicinal chemistry-is developed. The key step was an intramolecular [2 + 2]-photocyclization. The photochemical step was performed on a gram scale. Crystallographic analysis of the obtained compounds revealed that they occupy a novel chemical space and can be considered as elongated analogues of 3-substituted piperidines.
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Affiliation(s)
| | | | | | - Yevhen Skalenko
- Enamine Ltd., Chervonotkatska 78, 02094 Kyiv, Ukraine.,V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry NAS of Ukraine, Murmanska 1, 02094 Kyiv, Ukraine
| | | | | | - Pavel K Mykhailiuk
- Enamine Ltd., Chervonotkatska 78, 02094 Kyiv, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska 64, 01601 Kyiv, Ukraine
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9
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Ji YX, Li J, Li CM, Qu S, Zhang B. Manganese-Catalyzed N-F Bond Activation for Hydroamination and Carboamination of Alkenes. Org Lett 2020; 23:207-212. [PMID: 33305569 DOI: 10.1021/acs.orglett.0c03916] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A visible-light-promoted method for generating amidyl radicals from N-fluorosulfonamides via a manganese-catalyzed N-F bond activation strategy is reported. This protocol employs a simple manganese complex, Mn2(CO)10, as the precatalyst and a cheap silane, (MeO)3SiH, as both the hydrogen-atom donor and the F-atom acceptor, enabling intramolecular/intermolecular hydroaminations of alkenes, two-component carboamination of alkenes, and even three-component carboamination of alkenes. A wide range of valuable aliphatic sulfonamides can be readily prepared using these practical reactions.
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Affiliation(s)
- Yun-Xing Ji
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Jinxia Li
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Chun-Min Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Shuanglin Qu
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Bo Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
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