1
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Xu LC, Ma XD, Liu KM, Duan XF. Chemo- and Regioselective Alkylation of Pyridine N-Oxides with Titanacyclopropanes. Org Lett 2023. [PMID: 38016093 DOI: 10.1021/acs.orglett.3c03469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
While titanacyclopropanes are used to react mainly with ester, amide, and cyano to undergo cyclopropanation, herein they react preferentially with pyridine N-oxide to accomplish C2-H alkylation beyond these functionalities with double regioselectivity. After being pyridylated at the less hindered C-Ti bond, the remaining C-Ti bond of titanacyclopropanes can be further functionalized by various electrophiles, allowing facile introduction of complex alkyls onto the C2 of pyridines. Its synthetic potential has been demonstrated by late-stage diversification of drugs.
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Affiliation(s)
- Li-Chen Xu
- College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China
| | - Xiao-Di Ma
- College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China
| | - Kun-Ming Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China
| | - Xin-Fang Duan
- College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China
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2
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Wen TL, Bai JH, Bao MM, Qin Y, Su Y, Guo YL. Ultrasonic sample introduction combined with flame assisted thermal ionization: Pretreatment-free direct mass spectrometry analysis for fraction collecting tubes of preparative liquid chromatography. Talanta 2023; 259:124508. [PMID: 37043878 DOI: 10.1016/j.talanta.2023.124508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/18/2023] [Accepted: 03/30/2023] [Indexed: 04/14/2023]
Abstract
Ultrasonic sample introduction combined with flame assisted thermal ionization mass spectrometry (USI-FATI-MS) was developed to monitor the fractions of preparative liquid chromatography. Recently, ultrasound-based sample introduction techniques have achieved great advance in the field of high-throughput analysis. However, it is still a challenge to directly apply these existing techniques to the analysis of macro volume samples (mL level). In this work, ultrasonic sample introduction combined with flame assisted thermal ionization was used for pretreatment-free direct mass spectrometry analysis of micro to macro volume samples (μL-mL level). Utilizing this unique design of ultrasonic sample introduction, liquid sample in the container can be quickly atomized to the gas phase without contact. Then, due to the flame assisted thermal ionization source, desolvation and ionization of the sample droplets will occur immediately. USI-FATI-MS has shown excellent sensitivity, repeatability and great compatibility to solvents and compounds with a wide range of polarity. As a proof of concept, USI-FATI-MS has been applied for rapid monitoring and identification of purified synthetic and natural products in fractions.
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Affiliation(s)
- Tian-Lun Wen
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China; National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Jia-Hui Bai
- National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Ming-Mai Bao
- National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Yong Qin
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Yue Su
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
| | - Yin-Long Guo
- National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.
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3
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Qiu D, Liu H, Sun S, Ni H, Su Y. Bromide-mediated, C2-selective, and oxygenative alkylation of pyridinium salts using alkenes and molecular oxygen. Chem Commun (Camb) 2023; 59:2807-2810. [PMID: 36789965 DOI: 10.1039/d2cc06138d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Herein, we report a bromide-mediated, C2-selective, and oxygenative alkylation of pyridinium salts using alkenes and O2 for the synthesis of important β-2-pyridyl ketones. Notably, a quaternary carbon center was successfully installed at the C2-position of pyridine and the resulting C2-substituents were highly functionalized. The intermediary cycloadduct was isolated and further transformed into the desired product, which indicated that this three-component reaction underwent a reaction cascade including dearomative cycloaddition and rearomative ring-opening oxygenation. Finally, the bromide-mediated mechanism was discussed and active Br(I) species were proposed to be generated in situ and promote the rearomative ring-opening oxygenation by halogen bond-assisted electron transfer.
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Affiliation(s)
- Dong Qiu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, P. R. China. .,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huiyang Liu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, P. R. China. .,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shuai Sun
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, P. R. China.
| | - Hongyan Ni
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, P. R. China. .,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yijin Su
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, P. R. China.
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4
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Dalling AG, Späth G, Fürstner A. Total Synthesis of the Tetracyclic Pyridinium Alkaloid epi-Tetradehydrohalicyclamine B. Angew Chem Int Ed Engl 2022; 61:e202209651. [PMID: 35971850 PMCID: PMC9826155 DOI: 10.1002/anie.202209651] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Indexed: 01/11/2023]
Abstract
The first total synthesis of a tetracyclic marine pyridinium alkaloid hinged on recent advances in chemoselectivity management: While many classical methods failed to afford the perceptively simple pyridine-containing core of the target, nickel/iridium photoredox dual catalysis allowed the critical C-C bond to be formed in good yield. Likewise, ring closing alkyne metathesis (RCAM) worked well in the presence of the unhindered pyridine despite the innately Lewis acidic Mo(+6) center of the alkylidyne catalyst. Finally, an iridium catalyzed hydrosilylation was uniquely effective in reducing a tertiary amide without compromising an adjacent pyridine and the lateral double bonds; this transformation is largely without precedent. The second strained macrocycle enveloping the core was closed by intramolecular N-alkylation with formation of the pyridinium unit; the reaction proceeded site- and chemoselectively in the presence of an a priori more basic tertiary amine.
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Affiliation(s)
| | - Georg Späth
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
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5
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Dalling AG, Späth G, Fürstner A. Total Synthesis of the Tetracyclic Pyridinium Alkaloid epi‐Tetradehydrohalicyclamine B. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrew G. Dalling
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Organometallic Chemistry GERMANY
| | - Georg Späth
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Organometallic Chemistry GERMANY
| | - Alois Fürstner
- Max-Planck-Institut fur Kohlenforschung Organometallic Chemistry Kaiser-Wilhelm-Platz 1 45470 Mülheim/Ruhr GERMANY
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6
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Nagai T, Wang Y, Hagiwara K, Inoue M. Asymmetric synthesis of evoninic acid. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Vellakkaran M, Kim T, Hong S. Visible-Light-Induced C4-Selective Functionalization of Pyridinium Salts with Cyclopropanols. Angew Chem Int Ed Engl 2022; 61:e202113658. [PMID: 34734455 DOI: 10.1002/anie.202113658] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Indexed: 12/12/2022]
Abstract
The site-selective C-H functionalization of heteroarenes is of considerable importance for streamlining the rapid modification of bioactive molecules. Herein, we report a general strategy for visible-light-induced β-carbonyl alkylation at the C4 position of pyridines with high site selectivity using various cyclopropanols and N-amidopyridinium salts. In this process, hydrogen-atom transfer between the generated sulfonamidyl radicals and O-H bonds of cyclopropanols generates β-carbonyl radicals, providing efficient access to synthetically valuable β-pyridylated (aryl)ketones, aldehydes, and esters with broad functional-group tolerance. In addition, the mild method serves as an effective tool for the site-selective late-stage functionalization of complex and medicinally relevant molecules.
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Affiliation(s)
- Mari Vellakkaran
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS).,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Taehwan Kim
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS).,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS).,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
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8
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Vellakkaran M, Kim T, Hong S. Visible‐Light‐Induced C4‐Selective Functionalization of Pyridinium Salts with Cyclopropanols. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113658] [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]
Affiliation(s)
- Mari Vellakkaran
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS)
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Taehwan Kim
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS)
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS)
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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9
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Systematical study on the electronic properties of monoazaphenanthrene compounds by theoretical calculations and experimental observations. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2021.111370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Wang Y, Nagai T, Watanabe I, Hagiwara K, Inoue M. Total Synthesis of Euonymine and Euonyminol Octaacetate. J Am Chem Soc 2021; 143:21037-21047. [PMID: 34870420 DOI: 10.1021/jacs.1c11038] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Euonymine (1) and euonyminol octaacetate (2) share the core structure of euonyminol (3), the most hydroxylated member of the dihydro-β-agarofuran family. In 2, eight of the nine hydroxy groups of 3 are acetylated, and 1 has six acetyl groups and a 14-membered bislactone comprising a pyridine dicarboxylic acid with two methyl groups. The different acylation patterns provide distinct biological activities: 1 and 2 display anti-HIV and P-glycoprotein inhibitory effects, respectively. The 11 contiguous stereocenters and 9 oxygen functionalities of the ABC-ring system of 1 and 2 represent a formidable challenge, which is further heightened by the macrocyclic structure of 1. Here we disclose an efficient synthetic strategy for enantioselective total synthesis of 1 and 2. Starting from (R)-glycerol acetonide, we constructed the B-ring by an Et3N-accelerated Diels-Alder reaction, the C-ring by intramolecular iodoetherification, and the A-ring by ring-closing olefin metathesis. The 10 stereocenters were installed through a series of substrate-controlled stereoselective C-C and C-O bond formations by exploiting the three-dimensional structures of judiciously designed substrates. These newly developed reaction sequences led to protected euonyminol 5, which served as a common intermediate for assembling 1 and 2. Global deprotection of 5 and subsequent acetylation produced 2. Alternatively, the discriminative protective groups of 5 allowed for site-selective bis-esterification to generate bislactone. Combining [3 + 2]-cycloaddition and reductive desulfurization introduced the last remaining stereocenters of the two methyl groups on the macrocycle. Finally, deprotection and acetylation gave rise to fully synthetic 1 for the first time.
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Affiliation(s)
- Yinghua Wang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Toshiya Nagai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Itsuki Watanabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Koichi Hagiwara
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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11
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Fernandez‐Rodriguez P, Legros F, Maier T, Weber A, Méndez M, Derdau V, Hessler G, Kurz M, Villar‐Garea A, Ruf S. Photoinduced Decarboxylative Radical Addition Reactions for Late Stage Functionalization of Peptide Substrates. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Patricia Fernandez‐Rodriguez
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Fabien Legros
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Thomas Maier
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Angelika Weber
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - María Méndez
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Volker Derdau
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Gerhard Hessler
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Michael Kurz
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Ana Villar‐Garea
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Sven Ruf
- Sanofi Aventis Deutschland GmbH, R&D Integrated Drug Discovery Industriepark Hoechst 65926 Frankfurt am Main Germany
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12
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Liu Q, Zhang CS, Sheng H, Enders D, Wang ZX, Chen XY. Site-Selective Pyridyl Alkyl Ketone Synthesis from N-Alkenoxypyridiniums through Boekelheide-Type Rearrangements. Org Lett 2020; 22:5617-5621. [DOI: 10.1021/acs.orglett.0c01984] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qiang Liu
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Chao-Shen Zhang
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - He Sheng
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Xiang-Yu Chen
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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13
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Tydlitát J, Fecková M, le Poul P, Pytela O, Klikar M, Rodríguez-López J, Robin-le Guen F, Achelle S. Influence of Donor-Substituents on Triphenylamine Chromophores Bearing Pyridine Fragments. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jiří Tydlitát
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Michaela Fecková
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
- Institut des Sciences Chimiques de Rennes UMR6226; Université de Rennes, CNRS; 35000 Rennes France
| | - Pascal le Poul
- Institut des Sciences Chimiques de Rennes UMR6226; Université de Rennes, CNRS; 35000 Rennes France
| | - Oldřich Pytela
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Milan Klikar
- Institute of Organic Chemistry and Technology; Faculty of Chemical Technology; University of Pardubice; Studentská 573 53210 Pardubice Czech Republic
| | - Julián Rodríguez-López
- Facultad de Ciencias y Tecnologías Químicas; Universidad de Castilla-La Mancha; 13071 Ciudad Real Spain
| | - Françoise Robin-le Guen
- Institut des Sciences Chimiques de Rennes UMR6226; Université de Rennes, CNRS; 35000 Rennes France
| | - Sylvain Achelle
- Institut des Sciences Chimiques de Rennes UMR6226; Université de Rennes, CNRS; 35000 Rennes France
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14
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Luo G, Chen L, Conway CM, Kostich W, Johnson BM, Ng A, Macor JE, Dubowchik GM. Asymmetric Synthesis of the Major Metabolite of a Calcitonin Gene-Related Peptide Receptor Antagonist and Mechanism of Epoxide Hydrogenolysis. J Org Chem 2017; 82:3710-3720. [PMID: 28306261 DOI: 10.1021/acs.joc.7b00052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An asymmetric synthesis of the major metabolite of the calcitonin gene-related peptide recepotor antagonist BMS-846372 is presented. The variously substituted cyclohepta[b]pyridine ring system represents an underexplored ring system and showed some unexpected chemistry. Reactivities of epoxide and ketone functional groups on the cycloheptane ring were extensively controlled by a remote bulky TIPS group. The rate difference of the hydrogenolysis between two diastereomeric epoxide intermediates shed some light on the mechanism of epoxide hydrogenolysis, and further, deuterium labeling studies revealed more mechanistic details on this well-known chemical transformation for the first time.
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Affiliation(s)
- Guanglin Luo
- Bristol-Myers Squibb Research & Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06443, United States
| | - Ling Chen
- Bristol-Myers Squibb Research & Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06443, United States
| | - Charles M Conway
- Bristol-Myers Squibb Research & Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06443, United States
| | - Walter Kostich
- Bristol-Myers Squibb Research & Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06443, United States
| | - Benjamin M Johnson
- Bristol-Myers Squibb Research & Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06443, United States
| | - Alicia Ng
- Bristol-Myers Squibb Research & Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06443, United States
| | - John E Macor
- Bristol-Myers Squibb Research & Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06443, United States
| | - Gene M Dubowchik
- Bristol-Myers Squibb Research & Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06443, United States
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15
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Pola S, Bhongiri Y, Jadhav R, Ch P, G. V. Synthesis of new fused heterocyclic aromatic hydrocarbons via C–S and C–C bond formation by C–H bond activation in the presence of new Pd(ii) Schiff's base complexes. RSC Adv 2016. [DOI: 10.1039/c6ra15609f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Pd(ii) Schiff base macrocyclic complexes are used as photocatalysts with high stability, C–S bond and intramolecular C–H bond activation under visible light irradiation.
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Affiliation(s)
- Someshwar Pola
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad
- India
| | - Yadagiri Bhongiri
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad
- India
| | - Ramchander Jadhav
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad
- India
| | - Prabhakar Ch
- Department of Chemistry
- National Institute of Technology
- Kurukshetra
- India
| | - Venkanna G.
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad
- India
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16
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Bume DD, Pitts CR, Lectka T. Tandem C-C Bond Cleavage of Cyclopropanols and Oxidative Aromatization by Manganese(IV) Oxide in a Direct C-H to C-C Functionalization of Heteroaromatics. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501405] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Silva TR, Westphal E, Gallardo H, Vieira IC. Ionic Organic Film Sensor for Determination of Phenolic Compounds. ELECTROANAL 2014. [DOI: 10.1002/elan.201400197] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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18
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Zhao H, Yue Y, Li H, Sheng Z, Yang Z, Meng W. Asymmetric Synthesis of Novel Axially Chiral 2,2′-BipyridineN,N′-Dioxides Bearingα-Amino Acid Residues and Their Applications in Enantioselective Allylation of Aromatic Aldehydes with Allyltrichlorosilane. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201300090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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20
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Luo G, Chen L, Conway CM, Denton R, Keavy D, Gulianello M, Huang Y, Kostich W, Lentz KA, Mercer SE, Schartman R, Signor L, Browning M, Macor JE, Dubowchik GM. Discovery of BMS-846372, a Potent and Orally Active Human CGRP Receptor Antagonist for the Treatment of Migraine. ACS Med Chem Lett 2012; 3:337-41. [PMID: 24900474 DOI: 10.1021/ml300021s] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 02/27/2012] [Indexed: 01/14/2023] Open
Abstract
Calcitonin gene-related peptide (CGRP) receptor antagonists have been clinically shown to be effective in the treatment of migraine, but identification of potent and orally bioavailable compounds has been challenging. Herein, we describe the conceptualization, synthesis, and preclinical characterization of a potent, orally active CGRP receptor antagonist 5 (BMS-846372). Compound 5 has good oral bioavailability in rat, dog, and cynomolgus monkeys and overall attractive preclinical properties including strong (>50% inhibition) exposure-dependent in vivo efficacy in a marmoset migraine model.
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Affiliation(s)
- Guanglin Luo
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Ling Chen
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Charles M. Conway
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Rex Denton
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Deborah Keavy
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Michael Gulianello
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Yanling Huang
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Walter Kostich
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Kimberley A. Lentz
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Stephen E. Mercer
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Richard Schartman
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Laura Signor
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Marc Browning
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - John E. Macor
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Gene M. Dubowchik
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
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Cheng P, Clive DLJ. Formation of Optically Pure Cyclic Amines by Intramolecular Conjugate Displacement. J Org Chem 2012; 77:3348-64. [DOI: 10.1021/jo3001657] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ping Cheng
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Derrick L. J. Clive
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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Warren SA, Stokes S, Frampton CS, White AJP, Spivey AC. Synthesis of anti and syn hydroxy-iso-evoninic acids. Org Biomol Chem 2012; 10:4685-8. [DOI: 10.1039/c2ob25625h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lam AKY, Li C, Khairallah G, Kirk BB, Blanksby SJ, Trevitt AJ, Wille U, O'Hair RAJ, da Silva G. Gas-phase reactions of aryl radicals with 2-butyne: experimental and theoretical investigation employing the N-methyl-pyridinium-4-yl radical cation. Phys Chem Chem Phys 2012; 14:2417-26. [DOI: 10.1039/c2cp22970f] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Nguyen TT, Marquise N, Chevallier F, Mongin F. Deprotonative Metalation of Aromatic Compounds by Using an Amino-Based Lithium Cuprate. Chemistry 2011; 17:10405-16. [DOI: 10.1002/chem.201100990] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Indexed: 11/08/2022]
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Hayashi T, Ohmori K, Suzuki K. Ring Expansion Approach to Azaspiro[4.5]decane Skeletons via Electrophilic Activation of Benzocyclobutenols Bearing Pyridyl Group. CHEM LETT 2011. [DOI: 10.1246/cl.2011.612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Luján-Montelongo JA, Ávila-Zárraga JG. Palladium (II) catalyzed 5-endo epoxynitrile cyclizations: total syntheses of enokipodins A and B. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.02.072] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mamane V, Louërat F, Iehl J, Abboud M, Fort Y. A general and efficient method for the synthesis of benzo-(iso)quinoline derivatives. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.09.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fleming FF, Wei Y, Liu W, Zhang Z. Metalated Nitriles: Stereodivergent Cation-Controlled Cyclizations1. Tetrahedron 2008; 64:7477-7488. [PMID: 19657380 PMCID: PMC2597827 DOI: 10.1016/j.tet.2008.05.110] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Stereodivergent cyclizations of gamma-hydroxy cyclohexanecarbonitriles are controlled simply through judicious choice of cation in the alkylmetal base. Deprotonating a series of cyclic gamma-hydroxy nitriles with i-PrMgBr generates C-magnesiated nitriles that cyclize under stereoelectronic control to cis-fused hydrindanes, decalins, and bicyclo [5.4.0] undecanes. An analogous deprotonation with BuLi triggers cyclization to trans-fused hydrindanes, decalins, and bicyclo [5.4.0] undecanes consistent with a sterically controlled electrophilic attack on an equatorial nitrile anion. Using cations to control the geometry of metalated nitriles provides a versatile, stereodivergent cyclization to cis- and trans-hydrindanes, decalins, and [5. 4. 0] undecanes, and reveals the key geometric requirements for intramolecular S(N)2 and S(N)2' displacements.
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Affiliation(s)
- Fraser F. Fleming
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282-1530,
| | - Yunjing Wei
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282-1530,
| | - Wang Liu
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282-1530,
| | - Zhiyu Zhang
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282-1530,
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Abstract
Judicious choice of cation allows the selective cyclization of substituted gamma-hydroxynitriles to trans- or cis-decalins and trans- or cis-bicyclo[5.4.0]undecanes. The stereoselectivities are consistent with deprotonations generating two distinctly different metalated nitriles: an internally coordinated nitrile anion with BuLi, and a C-magnesiated nitrile with i-PrMgCl. Employing cations to control the geometry of metalated nitriles permits stereodivergent cyclizations with complete control over the stereochemistry of the quaternary, nitrile-bearing carbon.
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Affiliation(s)
- Fraser F Fleming
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282-1530, USA.
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