1
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Zhang Y, Bao ZP, Xu JX, Wu XF. Palladium-Catalyzed Perfluoroalkylative Carbonylation of 2-Allylaryl Trifluoromethanesulfonates: Base-Controlled Selective Access to β-Perfluoroalkyl Amides. Org Lett 2022; 24:6845-6850. [PMID: 36098561 DOI: 10.1021/acs.orglett.2c02779] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A palladium-catalyzed perfluoroalkylative carbonylation of 2-allylaryl trifluoromethanesulfonates has been developed. A range of 2-allyl trifluoromethanesulfonates, perfluoroalkyl halides, and amines were applied in this tandem procedure to provide the corresponding β-perfluoroalkyl amides with good functional group tolerance and high chemoselectivity. The final products were controlled by the base applied.
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Affiliation(s)
- Youcan Zhang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, Liaoning, China
| | - Zhi-Peng Bao
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, Liaoning, China.,Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Jian-Xing Xu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, Liaoning, China
| | - Xiao-Feng Wu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, Liaoning, China.,Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany
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2
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Xu H, Chen W, Bian M, Xu H, Gao H, Wang T, Zhou Z, Yi W. Gem-Difluorocyclopropenes as Versatile β-Monofluorinated Three-sp 2 Carbon Sources for Cp*Rh(III)-Catalyzed [4 + 3] Annulation: Experimental Development and Mechanistic Insight. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04508] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Huiying Xu
- Key Laboratory of Molecular Target and Clinical Pharmacology & State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Weijie Chen
- Key Laboratory of Molecular Target and Clinical Pharmacology & State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Mengyao Bian
- Key Laboratory of Molecular Target and Clinical Pharmacology & State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Hongtao Xu
- Shanghai Institute for Advanced Immunochemical Studies & School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Hui Gao
- Key Laboratory of Molecular Target and Clinical Pharmacology & State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Ting Wang
- Key Laboratory of Molecular Target and Clinical Pharmacology & State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Zhi Zhou
- Key Laboratory of Molecular Target and Clinical Pharmacology & State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Wei Yi
- Key Laboratory of Molecular Target and Clinical Pharmacology & State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
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3
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Eshghi H, Momen S, Gholizadeh M, Vakili M. Caesium Iodide as an Efficient Catalyst for Synthesis of N-Substituted Azepines via Tandem Michael Addition and Cyclisation under Aqueous Conditions. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/174751913x13824449342828] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Hossein Eshghi
- Department of Chemistry, School of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran
| | - Sara Momen
- Department of Chemistry, School of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran
| | - Mostafa Gholizadeh
- Department of Chemistry, School of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran
| | - Mohammad Vakili
- Department of Chemistry, School of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran
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4
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Zawodny W, Montgomery SL, Marshall JR, Finnigan JD, Turner NJ, Clayden J. Chemoenzymatic Synthesis of Substituted Azepanes by Sequential Biocatalytic Reduction and Organolithium-Mediated Rearrangement. J Am Chem Soc 2018; 140:17872-17877. [PMID: 30521324 DOI: 10.1021/jacs.8b11891] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Enantioenriched 2-aryl azepanes and 2-arylbenzazepines were generated biocatalytically by asymmetric reductive amination using imine reductases or by deracemization using monoamine oxidases. The amines were converted to the corresponding N'-aryl ureas, which rearranged on treatment with base with stereospecific transfer of the aryl substituent to the 2-position of the heterocycle via a configurationally stable benzyllithium intermediate. The products are previously inaccessible enantioenriched 2,2-disubstituted azepanes and benzazepines.
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Affiliation(s)
- Wojciech Zawodny
- School of Chemistry , University of Manchester, Manchester Institute of Biotechnology , 131 Princess Street , Manchester M1 7DN , United Kingdom
| | - Sarah L Montgomery
- School of Chemistry , University of Manchester, Manchester Institute of Biotechnology , 131 Princess Street , Manchester M1 7DN , United Kingdom
| | - James R Marshall
- School of Chemistry , University of Manchester, Manchester Institute of Biotechnology , 131 Princess Street , Manchester M1 7DN , United Kingdom
| | - James D Finnigan
- Prozomix Limited , Station Court , Haltwhistle NE49 9HN , United Kingdom
| | - Nicholas J Turner
- School of Chemistry , University of Manchester, Manchester Institute of Biotechnology , 131 Princess Street , Manchester M1 7DN , United Kingdom
| | - Jonathan Clayden
- School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , United Kingdom
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5
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Maddili SK, Chowrasia R, Kannekanti VK, Gandham H. 1,3-Di-n-butylimidazolium tribromide [BBim]Br 3: An efficient recyclable catalyst mediated synthesis of N-substituted azepines and their biological evaluation-interaction study with human serum albumin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 178:101-107. [PMID: 29128705 DOI: 10.1016/j.jphotobiol.2017.10.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 10/11/2017] [Accepted: 10/26/2017] [Indexed: 10/18/2022]
Abstract
A majority of previously reported methods suffer from insufficient yields as well as more complicated experimental procedures, a smaller amount of isolated yields involving time-consuming and tiresome work-up with the use of metal catalyst and restricted scope of substrates. To overcome these issues, an environmentally benign, ionic liquid endorsed multi-component protocol to N-substituted azepines has been exploited by means of coupling aromatic amines, dimethyl/diethyl acetylene dicarboxylate, 2,5-dimethoxytetrahydrofuran using 1,3-Di-n-butylimidazolium tribromide [BBim]Br3. The catalyst can be recycled and reused for subsequent reactions. The reactivated ionic liquid could be further reused twice as an accelerator All the synthesized compounds were further screened for their antimicrobial properties against three gram positive, four gram negative, and five fungal strains with chloromycin, norflaxacin, and fluconazole as reference drugs. Most of the tested compounds presented significant potency, especially, compound 4e displayed significant antibacterial activity (MIC=1-16μg/mL) whereas compound 4k showed momentous antifungal efficacy (MIC=2-32μg/mL). In addition binding behavior of compound 4e was investigated by binding study between calf thymus DNA and compound 4e by UV-Visible absorption spectroscopy and further research about HSA interactions were carried out. The observed wavelength showed a constancy thus revealing the occurrence of non-covalent π-π stacking interactions of compound 4e and HSA.
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Affiliation(s)
- Swetha K Maddili
- Department of Engineering Chemistry, AUCE (A), Andhra University, Vishakapatnam 530 003, India
| | - Rakhi Chowrasia
- Department of Chemistry, Osmania University, Hyderabad, Telangana State 500004, India
| | - Vijaya Kumar Kannekanti
- Department of Engineering Chemistry, AUCE (A), Andhra University, Vishakapatnam 530 003, India; Institute of Bioorganic & Medicinal Chemistry, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Himabindu Gandham
- Department of Engineering Chemistry, AUCE (A), Andhra University, Vishakapatnam 530 003, India.
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6
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Palillero-Cisneros A, Gordillo-Guerra PG, Aparicio-Solano DM, Gnecco D, Mendoza A, Juárez JR, Terán JL. 7-endo cyclization of 2,3-epoxyamides and 2,3-aziridine carboxamides by intramolecular Friedel–Crafts reaction. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2014.12.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Wang L, Ren ZL, Ding MW. Synthesis of 2,3-Dihydro-1H-2-benzazepin-1-ones and 3H-2-Benzoxepin-1-ones by Isocyanide-Based Multicomponent Reaction/Wittig Sequence Starting from Phosphonium Salt Precursors. J Org Chem 2014; 80:641-6. [DOI: 10.1021/jo502275f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Long Wang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan 430079, P. R. China
| | - Zhi-Lin Ren
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan 430079, P. R. China
| | - Ming-Wu Ding
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan 430079, P. R. China
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8
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Kim S, Mo J, Kim J, Ryu T, Lee PH. Aza-[4+3] and Aza-[3+2] Annulations for Synthesis of Dihydroazepines and Dihydropyrroles from Alkynes, Sulfonyl Azides, and 1,3-Dienes. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201402071] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Li X, Russell RK, Spink J, Ballentine S, Teleha C, Branum S, Wells K, Beauchamp D, Patch R, Huang H, Player M, Murray W. Process Development for Scale-Up of a Novel 3,5-Substituted Thiazolidine-2,4-dione Compound as a Potent Inhibitor for Estrogen-Related Receptor 1. Org Process Res Dev 2014. [DOI: 10.1021/op400325r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Xun Li
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Ronald K. Russell
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Jan Spink
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Scott Ballentine
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Christopher Teleha
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Shawn Branum
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Kenneth Wells
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Derek Beauchamp
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Raymond Patch
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Hui Huang
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - Mark Player
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
| | - William Murray
- Janssen Research & Development L.L.C., Welsh and McKean Roads, P.O. Box 776, Spring House, Pennsylvania 19477, United States
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10
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Iqbal N, Fiksdahl A. Gold(I)-Catalyzed Benz[c]azepin-4-ol Synthesis by Intermolecular [5 + 2] Cycloaddition. J Org Chem 2013; 78:7885-95. [DOI: 10.1021/jo401075n] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Naseem Iqbal
- Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | - Anne Fiksdahl
- Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
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11
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Compain G, Bonneau C, Martin-Mingot A, Thibaudeau S. Selective Anti-Markovnikov Cyclization and Hydrofluorination Reaction in Superacid HF/SbF5: A Tool in the Design of Nitrogen-Containing (Fluorinated) Polycyclic Systems. J Org Chem 2013; 78:4463-72. [DOI: 10.1021/jo400398y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Guillaume Compain
- Superacid group in
“Organic Synthesis”
team, Université de Poitiers, CNRS
UMR 7285 IC2MP, 4, avenue Michel Brunet, F-86022 Poitiers Cedex, France
| | - Céline Bonneau
- Superacid group in
“Organic Synthesis”
team, Université de Poitiers, CNRS
UMR 7285 IC2MP, 4, avenue Michel Brunet, F-86022 Poitiers Cedex, France
| | - Agnès Martin-Mingot
- Superacid group in
“Organic Synthesis”
team, Université de Poitiers, CNRS
UMR 7285 IC2MP, 4, avenue Michel Brunet, F-86022 Poitiers Cedex, France
| | - Sébastien Thibaudeau
- Superacid group in
“Organic Synthesis”
team, Université de Poitiers, CNRS
UMR 7285 IC2MP, 4, avenue Michel Brunet, F-86022 Poitiers Cedex, France
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12
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Mechanism of the oxidative degradation of dibenzoazepine derivatives via manganese(III) complexes in acidic phosphate media. REACTION KINETICS MECHANISMS AND CATALYSIS 2013. [DOI: 10.1007/s11144-012-0510-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Yin G, Zhu Y, Lu P, Wang Y. Lewis Acid-Promoted Three-Component Reactions of Propargylic Alcohols with 2-Butynedioates and Secondary Amines. J Org Chem 2011; 76:8922-9. [DOI: 10.1021/jo2016407] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Guangwei Yin
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yuanxun Zhu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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14
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Ramesh K, Murthy SN, Nageswar Y. Novel and efficient aqueous phase synthesis of N-substituted azepines via tandem Michael addition and cyclization in the presence of β-cyclodextrin. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.02.082] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Dumoulin D, Lebrun S, Couture A, Deniau E, Grandclaudon P. Asymmetric synthesis of 3- or 4-alkyl or arylbenzo[c]azepines. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.07.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Liu F, Martin-Mingot A, Jouannetaud MP, Karam O, Thibaudeau S. Substitution effect on the hydrofluorination reaction of unsaturated amines in superacid HF/SbF5. Org Biomol Chem 2009; 7:4789-97. [DOI: 10.1039/b915077c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Vicente J, Saura-Llamas I, García-López JA, Bautista D. Insertion of Isocyanides, Isothiocyanates, and Carbon Monoxide into the Pd−C Bond of Cyclopalladated Complexes Containing Primary Arylalkylamines of Biological and Pharmaceutical Significance. Synthesis of Lactams and Cyclic Amidinium Salts Related to the Isoquinoline, Benzo[g]isoquinoline, and β-Carboline Nuclei. Organometallics 2008. [DOI: 10.1021/om800951k] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José Vicente
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apartado 4021, E-30071 Murcia, Spain
| | - Isabel Saura-Llamas
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apartado 4021, E-30071 Murcia, Spain
| | - José-Antonio García-López
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apartado 4021, E-30071 Murcia, Spain
| | - Delia Bautista
- SAI, Universidad de Murcia, Apartado 4021, E-30071 Murcia, Spain
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18
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Al-Qawasmeh RA, Lee Y, Cao MY, Gu X, Viau S, Lightfoot J, Wright JA, Young AH. 11-Phenyl-[b,e]-dibenzazepine compounds: novel antitumor agents. Bioorg Med Chem Lett 2008; 19:104-7. [PMID: 19027297 DOI: 10.1016/j.bmcl.2008.11.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2008] [Revised: 10/31/2008] [Accepted: 11/03/2008] [Indexed: 11/26/2022]
Abstract
A series of 11-phenyl-[b,e]-dibenzazepine compounds were synthesized and shown to be inhibitors of tumor cell proliferation with IC(50) values ranging from submicromolar to micromolar concentrations. Flow cytometric analyses of several active compounds demonstrated inhibition of cell cycle progression at the G(0)-G(1) phase transition resulting in G(0)-G(1) arrest.
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19
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Grunewald GL, Seim MR, Bhat SR, Wilson ME, Criscione KR. Synthesis of 4,5,6,7-tetrahydrothieno[3,2-c]pyridines and comparison with their isosteric 1,2,3,4-tetrahydroisoquinolines as inhibitors of phenylethanolamine N-methyltransferase. Bioorg Med Chem 2008; 16:542-59. [PMID: 18024134 PMCID: PMC2269732 DOI: 10.1016/j.bmc.2007.08.066] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2007] [Revised: 08/23/2007] [Accepted: 08/28/2007] [Indexed: 11/30/2022]
Abstract
A series of substituted 4,5,6,7-tetrahydrothieno[3,2-c]pyridines (THTPs) was synthesized and evaluated for their human phenylethanolamine N-methyltransferase (hPNMT) inhibitory potency and affinity for the alpha(2)-adrenoceptor. The THTP nucleus was suggested as an isosteric replacement for the 1,2,3,4-tetrahydroisoquinoline (THIQ) ring system on the basis that 3-thienylmethylamine (18) was more potent as an inhibitor of hPNMT and more selective toward the alpha(2)-adrenoceptor than benzylamine (15). Although the isosterism was confirmed, with similar influence of functional groups and chirality in both systems on hPNMT inhibitory potency and selectivity, the THTP compounds proved, in general, to be less potent as inhibitors of hPNMT than their THIQ counterparts, with the drop in potency being primarily attributed to the electronic properties of the thiophene ring. A hypothesis for the reduced hPNMT inhibitory potency of these compounds has been formed on the basis of molecular modeling and docking studies using the X-ray crystal structures of hPNMT co-crystallized with THIQ-type inhibitors and S-adenosyl-L-homocysteine as a template.
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Affiliation(s)
- Gary L Grunewald
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS 66045, USA.
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20
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Déchamps I, Gomez Pardo D, Cossy J. Ring Expansion Induced by DAST: Synthesis of Substituted 3-Fluoropiperidines from Prolinols and 3-Fluoroazepanes from 2-Hydroxymethylpiperidines. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700237] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Thibaudeau S, Martin-Mingot A, Jouannetaud MP, Karam O, Zunino F. A novel, facile route to β-fluoroamines by hydrofluorination using superacid HF–SbF5. Chem Commun (Camb) 2007:3198-200. [PMID: 17653387 DOI: 10.1039/b703629a] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A range of unsaturated amines and sulfonamides were converted to beta-fluoro nitrogen analogues after hydrofluorination in superacid HF-SbF(5), based on the formation of highly reactive electrophilic intermediates.
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Affiliation(s)
- Sébastien Thibaudeau
- Université de Poitiers, CNRS UMR 6514, Laboratoire "Synthèse et Réactivité des Substances Naturelles", F-86022 Poitiers Cedex, France.
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22
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Sun A, Lankin DC, Hardcastle K, Snyder JP. 3-Fluoropiperidines andN-Methyl-3-fluoropiperidinium Salts: The Persistence of Axial Fluorine. Chemistry 2005; 11:1579-91. [PMID: 15662680 DOI: 10.1002/chem.200400835] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
It has previously been shown that the fluorine atom in N-protonated 3-fluoropiperidine salts in water strongly prefers the axial orientation in the six-membered ring chairs. In the present work we examine the proposition that the N-methyl salts are equally disposed to present axial fluorine. Initially, we explored this point by comparing the structures of the corresponding NH2+, NHMe+, and NMe2+ salts by means of density functional theory (DFT), ab initio, and MMFF force field calculations with and without aqueous solvation models. The predictions unambiguously pointed to axial fluorine for all salts investigated, including those with simultaneous axial F and (N)Me. The calculations were followed by synthesis of the corresponding series of 4,4-diphenylpiperidinium salts. These were evaluated by one- and two-dimensional NMR spectroscopy in [D6]DMSO to fully corroborate the axial disposition of the fluorine in each of the compounds. X-ray crystal structure determinations were likewise performed for the diphenyl-3-fluoro NH2+ and NMe2+ systems to substantiate axial-F. Comparison of the X-ray structures of the fluorinated and unfluorinated NMe2+ salts reveals that the fluorine resides axial in spite of substantial steric compression. While the charge-dipole phenomenon responsible for the axial-F conformation in the parent protonated fluoropiperidinium compounds carries over to doubly alkylated salts, we show that it extends to molecular orientation in the packing of the unit cells in the solid state as well. Finally, using the computational methods that successfully motivated our synthesis and structural work, we have made predictions for a number of new structures and re-examined some parallel results reported by the Eliel group in the early 1970s. Although C-F...H-N hydrogen bonds are reported to be weak and few in number, the CF...HN charge-dipole orienting effect is a powerful directing force that matches the hydrogen-bond in both its energetic contribution and conformational consequences.
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Affiliation(s)
- Aiming Sun
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
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Shklyaev YV, Glushkov VA, El’tzov MA, Gatilov YV, Bagryanskaya IY, Tolstikov AG. Synthesis of regioisomeric (S)-(+)-3,3,4-trimethyl-8-methoxy-3,4-dihydrobenzo[h]-isoquinolin-1(2H)-one and (S)-(+)-1,2,2-trimethyl-8-methoxy-1,2-dihydrobenzo[f]-isoquinolin-4(3H)-one by the Ritter reaction. MENDELEEV COMMUNICATIONS 2005. [DOI: 10.1070/mc2005v015n03abeh001948] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lankin DC, Grunewald GL, Romero FA, Oren IY, Snyder JP. The NH---FC dipole orientation effect for pendant exocyclic CH(2)F. Org Lett 2002; 4:3557-60. [PMID: 12375886 DOI: 10.1021/ol026358c] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[structure: see text] DFT and MMFF force field calculations for 2 (R = H) predict that two conformers dominate in water (>/=95%) and both sustain a geometry in which the C-F and H-N dipoles align oppositely in a near-planar arrangement. The (1)H NMR spectra (D(2)O and DMSO-d(6)) and X-ray structure for 2 (R = SO(2)NHEt) confirm the predictions in all essentials. A novel single-conformer system is proposed.
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Affiliation(s)
- David C Lankin
- Pharmacia Corporation, 4901 Searle Parkway/P-024, Skokie, Illinois 60077, USA
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