1
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Salazar-Mendoza D, Luis García-Gutiérrez J, Jiménez-Cruz F. A small library of C–H⋯O hydrogen bonds based on supramolecular architectures of 1,5-diketone malonates in the solid state. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023] Open
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2
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Fang X, Wen S, Jin P, Bao W, Liu S, Cong H, Shen X. Synthesis of Enantioenriched Fluorinated Enol Silanes Enabled by Asymmetric Reductive Coupling of Fluoroalkylacylsilanes and 1,3-Enynes and Brook Rearrangement. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00100] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xiaowu Fang
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Songwei Wen
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Peishen Jin
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Wenjing Bao
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Shanshan Liu
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Hengjiang Cong
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Xiao Shen
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
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3
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Li J, Liu S, Zhong R, Yang Y, He Y, Yang J, Ma Y, Wang Z. Reversal of Regioselectivity in Nucleophilic Difluoroalkylation of α,β-Enones Employing In Situ-Formed Sterically Encumbered Silylium Catalyst. Org Lett 2021; 23:5859-5864. [PMID: 34282922 DOI: 10.1021/acs.orglett.1c01993] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An efficient approach for the reversal of regioselectivity in the nucleophilic introduction of difluorinated carbanion into α,β-enones has been developed via a silylium catalysis. The strong electron-withdrawing properties and bulky substituents of in situ-generated silyl triflic imide catalyst is the key for the 1,4-addition reaction to proceed smoothly. The synthetic utility is highlighted by the further use of this method for the synthesis of 2,4,6-triarylsubstituted 3-fluoropyridines in a one-pot manner.
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Affiliation(s)
- Jinshan Li
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Saimei Liu
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Rong Zhong
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Yaqi Yang
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Yuru He
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Jianguo Yang
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Yongmin Ma
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Zhiming Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
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4
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He JX, Zhang ZH, Mu BS, Cui XY, Zhou J, Yu JS. Catalyst-Free and Solvent-Controlled Divergent Synthesis of Difluoromethylene-Containing S-Heterocycles. J Org Chem 2021; 86:9206-9217. [DOI: 10.1021/acs.joc.1c00754] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jun-Xiong He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
| | - Zhi-Hao Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
| | - Bo-Shuai Mu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
| | - Xiao-Yuan Cui
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development and Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, P. R. China
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, P. R. China
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5
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Shi Y, Pan BW, He JX, Zhou Y, Zhou J, Yu JS. Construction of gem-Difluoroenol Esters through Catalytic O-Selective Addition of Difluoroenoxysilanes to Ketenes. J Org Chem 2021; 86:7797-7805. [DOI: 10.1021/acs.joc.1c00570] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yang Shi
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Bo-Wen Pan
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Jun-Xiong He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Ying Zhou
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
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6
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Pan B, Shi Y, Tian Y, Zhou Y, Zhou J, Yu J. Synthesis of Multifunctional
α
,
α
‐Difluoroketones through Allylic Alkylation of Difluoroenoxysilanes with MBH Carbonates. Chem Asian J 2020; 15:4028-4032. [DOI: 10.1002/asia.202001145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 10/19/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Bo‐Wen Pan
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
| | - Yang Shi
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
| | - You‐Ping Tian
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
| | - Ying Zhou
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
| | - Jian Zhou
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai 200062 P. R. China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS Shanghai 200032 P.R. China
| | - Jin‐Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai 200062 P. R. China
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7
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Abstract
The first enantioselective total syntheses of highly complex hexacyclic meroterpenoids STR-2 and -9 (strongylophorine (STR)) are reported. Key elements of the synthetic route include the use of Robinson-type annulation reaction to construct the tricyclic terpenoid building block and a highly efficient PIDA-mediated 1,3-diaxial sp3 C-H activation to incorporate the requisite δ-lactone moiety. This route also enables the determination of absolute configuration of the synthesized natural products.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry , Indian Institute of Technology , Kanpur , Uttar Pradesh 208016 , India
| | - Susanta Kumar Sau
- Department of Chemistry , Indian Institute of Technology , Kanpur , Uttar Pradesh 208016 , India
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8
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Internally reuse by-product as promoter: A catalyst-free imine formation/Mukaiyama-Mannich sequence of α-amido sulfones with fluorinated silyl enol ethers. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.01.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Tian YP, Gong Y, Hu XS, Yu JS, Zhou Y, Zhou J. HClO4 catalysed aldol-type reaction of fluorinated silyl enol ethers with acetals or ketals toward fluoroalkyl ethers. Org Biomol Chem 2019; 17:9430-9434. [DOI: 10.1039/c9ob02129a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient metal-free catalytic aldol-type reaction of fluorinated enol silyl ethers and acetals/ketals toward functionalized fluoroalkyl ethers is developed by using less than 1.0 mol% HClO4 (70 wt%, aq.).
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Affiliation(s)
- You-Ping Tian
- College of Pharmacy
- Guizhou University of Traditional Chinese Medicine
- Guiyang 550025
- China
| | - Yi Gong
- College of Pharmacy
- Guizhou University of Traditional Chinese Medicine
- Guiyang 550025
- China
| | - Xiao-Si Hu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
| | - Ying Zhou
- College of Pharmacy
- Guizhou University of Traditional Chinese Medicine
- Guiyang 550025
- China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
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10
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Hu XS, Ding PG, Yu JS, Zhou J. A Sc(OTf)3 catalyzed Mukaiyama–Mannich reaction of difluoroenoxysilanes with unactivated ketimines. Org Chem Front 2019. [DOI: 10.1039/c9qo00577c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first example of a Mukaiyama–Mannich reaction of difluoroenoxysilanes with unactivated ketimines catalyzed by Sc(OTf)3 is described.
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Affiliation(s)
- Xiao-Si Hu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Pei-Gang Ding
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- East China Normal University
- Shanghai 200062
- China
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11
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Hu XS, Yu JS, Zhou J. Catalytic selective mono- and difluoroalkylation using fluorinated silyl enol ethers. Chem Commun (Camb) 2019; 55:13638-13648. [DOI: 10.1039/c9cc07677h] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This feature article highlights our recent achievements in catalytic selective mono- and difluoroalkylation using fluorinated silyl enol ethers (FSEEs).
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Affiliation(s)
- Xiao-Si Hu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
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12
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Hao YJ, Hu XS, Yu JS, Zhou F, Zhou Y, Zhou J. An efficient Fe(III)-catalyzed 1,6-conjugate addition of para-quinone methides with fluorinated silyl enol ethers toward β,β-diaryl α-fluorinated ketones. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.11.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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13
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Affiliation(s)
- Hideki Amii
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University
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14
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Percy JM, McCarter AW, Sewell AL, Sloan N, Kennedy AR, Hirst DJ. Developing the Saegusa–Ito Cyclisation for the Synthesis of Difluorinated Cyclohexenones. Chemistry 2015; 21:19119-27. [DOI: 10.1002/chem.201503653] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Jonathan M. Percy
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - Adam W. McCarter
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - Alan L. Sewell
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - Nikki Sloan
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - Alan R. Kennedy
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - David J. Hirst
- Flexible Discovery Unit, GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, SG1 2NY (UK)
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15
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1,4-Addition of the CF3 group, perfluoroalkyl groups and functionalized difluoromethylated moieties: An overview. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.07.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Qian J, Yi W, Huang X, Miao Y, Zhang J, Cai C, Zhang W. One-Pot Synthesis of 3,5-Disubstituted and Polysubstituted Phenols from Acyclic Precursors. Org Lett 2015; 17:1090-3. [DOI: 10.1021/ol503615n] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Jinlong Qian
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Wenbin Yi
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xin Huang
- Department
of Chemistry, University of Massachusetts Boston, Boston, Massachusetts 02125, United States
| | - Yongbo Miao
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Junkai Zhang
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Chun Cai
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Wei Zhang
- Department
of Chemistry, University of Massachusetts Boston, Boston, Massachusetts 02125, United States
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17
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Zhang HJ, Priebbenow DL, Bolm C. Acylsilanes: valuable organosilicon reagents in organic synthesis. Chem Soc Rev 2013; 42:8540-71. [DOI: 10.1039/c3cs60185d] [Citation(s) in RCA: 168] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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18
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Ladzik S, Lubbe M, Kelzhanova NK, Abilov ZA, Feist H, Langer P. Regioselective synthesis of 5-ethoxycarbonyl-, 5-acetyl- and 5-trifluoroacetyl-6-trifluoromethylsalicylates by one-pot cyclizations of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3-alkoxy-2-alken-1-ones. J Fluor Chem 2012. [DOI: 10.1016/j.jfluchem.2012.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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19
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Honda M, Nakajima T, Okada M, Yamaguchi K, Suda M, Kunimoto KK, Segi M. Reaction of acylsilanes with α-sulfinyl carbanions: regioselective synthesis of silyl enol ethers. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.05.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Massicot F, Iriarte AM, Brigaud T, Lebrun A, Portella C. Synthesis of trifluoromethyl cyclohexyl, cyclohexenyl and aryl compounds via stepwise Robinson annulation. Org Biomol Chem 2011; 9:600-3. [DOI: 10.1039/c0ob00518e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Ibad MF, Abid OUR, Adeel M, Nawaz M, Wolf V, Villinger A, Langer P. Synthesis of Highly Functionalized Biaryls by Condensation of 2-Fluoro-1,3-bis(silyloxy) 1,3-Dienes with 3-Cyanochromones and Subsequent Domino “Retro-Michael/Aldol/Fragmentation”. J Org Chem 2010; 75:8315-8. [DOI: 10.1021/jo1018443] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Muhammad Farooq Ibad
- Institut für Chemie der Universität Rostock, Albert-Einstein-Strasse 3a, D-18059 Rostock, Germany
| | - Obaid-ur-Rahman Abid
- Institut für Chemie der Universität Rostock, Albert-Einstein-Strasse 3a, D-18059 Rostock, Germany
| | - Muhammad Adeel
- Institut für Chemie der Universität Rostock, Albert-Einstein-Strasse 3a, D-18059 Rostock, Germany
- Department of Chemistry, Gomal University, Dera Ismail Khan, K.P.K., Pakistan
| | - Muhammad Nawaz
- Institut für Chemie der Universität Rostock, Albert-Einstein-Strasse 3a, D-18059 Rostock, Germany
| | - Verena Wolf
- Institut für Chemie der Universität Rostock, Albert-Einstein-Strasse 3a, D-18059 Rostock, Germany
| | - Alexander Villinger
- Institut für Chemie der Universität Rostock, Albert-Einstein-Strasse 3a, D-18059 Rostock, Germany
| | - Peter Langer
- Institut für Chemie der Universität Rostock, Albert-Einstein-Strasse 3a, D-18059 Rostock, Germany
- Leibniz Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
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22
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Büttner S, Bendrath F, Langer P. Synthesis and reactions of the first fluoroalkylated 1,3-bis(trimethylsilyloxy)-1,3-butadienes. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.05.082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Gawronski J, Wascinska N, Gajewy J. Recent progress in Lewis base activation and control of stereoselectivity in the additions of trimethylsilyl nucleophiles. Chem Rev 2009; 108:5227-52. [PMID: 18850749 DOI: 10.1021/cr800421c] [Citation(s) in RCA: 251] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jacek Gawronski
- Department of Chemistry, A. Mickiewicz University, Poznań, Poland
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24
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Vacondio F, Silva C, Lodola A, Fioni A, Rivara S, Duranti A, Tontini A, Sanchini S, Clapper J, Piomelli D, Mor M, Tarzia G. Structure-property relationships of a class of carbamate-based fatty acid amide hydrolase (FAAH) inhibitors: chemical and biological stability. ChemMedChem 2009; 4:1495-504. [PMID: 19554599 PMCID: PMC3517974 DOI: 10.1002/cmdc.200900120] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Indexed: 11/07/2022]
Abstract
Cyclohexylcarbamic acid aryl esters are a class of fatty acid amide hydrolase (FAAH) inhibitors, which includes the reference compound URB597. The reactivity of their carbamate fragment is involved in pharmacological activity and may affect their pharmacokinetic and toxicological properties. We conducted in vitro stability experiments in chemical and biological environments to investigate the structure-stability relationships in this class of compounds. The results show that electrophilicity of the carbamate influences chemical stability, as suggested by the relation between the rate constant of alkaline hydrolysis (log k(pH9)) and the energy of the lowest unoccupied molecular orbital (LUMO). Introduction of small electron-donor substituents at conjugated positions of the O-aryl moiety increased the overall hydrolytic stability of the carbamate group without affecting FAAH inhibitory potency, whereas peripheral non-conjugated hydrophilic groups, which favor FAAH recognition, helped decrease oxidative metabolism in the liver.
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Affiliation(s)
- Federica Vacondio
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27/A, Campus Universitario, I-43100 Parma, Italy, Fax: (+39) 0521 905006
| | - Claudia Silva
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27/A, Campus Universitario, I-43100 Parma, Italy, Fax: (+39) 0521 905006
| | - Alessio Lodola
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27/A, Campus Universitario, I-43100 Parma, Italy, Fax: (+39) 0521 905006
| | - Alessandro Fioni
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27/A, Campus Universitario, I-43100 Parma, Italy, Fax: (+39) 0521 905006
| | - Silvia Rivara
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27/A, Campus Universitario, I-43100 Parma, Italy, Fax: (+39) 0521 905006
| | - Andrea Duranti
- Istituto di Chimica Farmaceutica e Tossicologica, Università degli Studi di Urbino “Carlo Bo”, Piazza del Rinascimento 6, I-61029 Urbino, Italy
| | - Andrea Tontini
- Istituto di Chimica Farmaceutica e Tossicologica, Università degli Studi di Urbino “Carlo Bo”, Piazza del Rinascimento 6, I-61029 Urbino, Italy
| | - Silvano Sanchini
- Istituto di Chimica Farmaceutica e Tossicologica, Università degli Studi di Urbino “Carlo Bo”, Piazza del Rinascimento 6, I-61029 Urbino, Italy
| | - Jason Clapper
- Department of Pharmacology, University of California, Irvine, 360 MSRII, CA 92697-4625, USA
| | - Daniele Piomelli
- Department of Pharmacology, University of California, Irvine, 360 MSRII, CA 92697-4625, USA
- Department of Drug Discovery and Development, Italian Institute of Technology, via Morego 30, I-16163 Genova, Italy
| | - Marco Mor
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27/A, Campus Universitario, I-43100 Parma, Italy, Fax: (+39) 0521 905006
| | - Giorgio Tarzia
- Istituto di Chimica Farmaceutica e Tossicologica, Università degli Studi di Urbino “Carlo Bo”, Piazza del Rinascimento 6, I-61029 Urbino, Italy
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Affiliation(s)
- Hideki Amii
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe 657-8501, Japan, and Department of Applied Chemistry, Faculty of Engineering, Okayama Univeristy, Okayama 700-8530, Japan
| | - Kenji Uneyama
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe 657-8501, Japan, and Department of Applied Chemistry, Faculty of Engineering, Okayama Univeristy, Okayama 700-8530, Japan
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26
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Regioselective synthesis of 4-alkyl- and 4-aryl-6-(perfluoroalkyl)salicylic acid derivatives by formal [3+3] cyclocondensation of 1,3-bis(silyloxy)-1,3-butadienes with 3-silyloxy-1-(perfluoroalkyl)prop-2-en-1-ones. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.06.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Ni C, Zhang L, Hu J. Nucleophilic Fluoroalkylation of α,β-Enones, Arynes, and Activated Alkynes with Fluorinated Sulfones: Probing the Hard/Soft Nature of Fluorinated Carbanions. J Org Chem 2008; 73:5699-713. [DOI: 10.1021/jo702479z] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| | - Laijun Zhang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
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28
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Prakash GKS, Zhao X, Chacko S, Wang F, Vaghoo H, Olah GA. Efficient 1,4-addition of alpha-substituted fluoro(phenylsulfonyl)methane derivatives to alpha,beta-unsaturated compounds. Beilstein J Org Chem 2008; 4:17. [PMID: 18941481 PMCID: PMC2486456 DOI: 10.3762/bjoc.4.17] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 05/15/2008] [Indexed: 11/23/2022] Open
Abstract
The 1,4-addition of a monofluoromethyl nucleophile to a variety of α,β-unsaturated compounds has been achieved under mild conditions using either phosphines or potassium carbonate at room temperature. α-Substituted fluoro(phenylsulfonyl)methane easily undergoes Michael addition to α,β-unsaturated ketones, esters, nitriles, sulfones, as well as propynoates at room temperature to yield the corresponding adducts in moderate to excellent yields.
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Affiliation(s)
- G K Surya Prakash
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, USA.
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29
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Huguenot F, Billac A, Brigaud T, Portella C. Umpolung Reactivity of Difluoroenol Silyl Ethers with Amines and Amino Alcohols. Application to the Synthesis of Enantiopure α-Difluoromethyl Amines and Amino Acids. J Org Chem 2008; 73:2564-9. [DOI: 10.1021/jo702328v] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Florent Huguenot
- Institut de Chimie Moléculaire de Reims, CNRS - Université de Reims Champagne-Ardenne (UMR 6229), Faculté des Sciences, B.P. 1039, 51687 Reims Cedex 2, France, and Laboratoire “ Synthèse Organique Sélective et Chimie Organométallique ” (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
| | - Anne Billac
- Institut de Chimie Moléculaire de Reims, CNRS - Université de Reims Champagne-Ardenne (UMR 6229), Faculté des Sciences, B.P. 1039, 51687 Reims Cedex 2, France, and Laboratoire “ Synthèse Organique Sélective et Chimie Organométallique ” (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
| | - Thierry Brigaud
- Institut de Chimie Moléculaire de Reims, CNRS - Université de Reims Champagne-Ardenne (UMR 6229), Faculté des Sciences, B.P. 1039, 51687 Reims Cedex 2, France, and Laboratoire “ Synthèse Organique Sélective et Chimie Organométallique ” (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
| | - Charles Portella
- Institut de Chimie Moléculaire de Reims, CNRS - Université de Reims Champagne-Ardenne (UMR 6229), Faculté des Sciences, B.P. 1039, 51687 Reims Cedex 2, France, and Laboratoire “ Synthèse Organique Sélective et Chimie Organométallique ” (SOSCO), UMR CNRS 8123, Université de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
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Hussain I, Yawer MA, Lau M, Pundt T, Fischer C, Görls H, Langer P. Regioselective Synthesis of Fluorinated Phenols, Biaryls, 6H-Benzo[c]chromen-6-ones and Fluorenones Based on Formal [3+3] Cyclizations of 1,3-Bis(silyl enol ethers). European J Org Chem 2008. [DOI: 10.1002/ejoc.200700887] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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34
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Synthesis of ortho-perfluoroalkyl phenones from hemifluorinated enones as key building blocks. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.07.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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35
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Mizuta S, Shibata N, Ogawa S, Fujimoto H, Nakamura S, Toru T. Lewis acid-catalyzed tri- and difluoromethylation reactions of aldehydes. Chem Commun (Camb) 2006:2575-7. [PMID: 16779482 DOI: 10.1039/b603041f] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The first Lewis acid-catalyzed trifluoromethylation reactions of aldehydes with Me3SiCF3 under TiF4/DMF, Ti(O iPr)4/DMF and Cu(OAc)2/dppp/toluene conditions are described. We have successfully applied this methodology to the difluoromethylation of aldehydes using Me3SiCF2SePh, Me3SiCF2P(O)OEt2 and Me3SiCF2SPh.
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Affiliation(s)
- Satoshi Mizuta
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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36
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Jonet S, Cherouvrier F, Brigaud T, Portella C. Mild Synthesis of β-Amino-α,α-difluoro Ketones from Acylsilanes and Trifluoromethyltrimethylsilane in a One-Pot Imino Aldol Reaction. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500106] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Chorki F, Grellepois F, Crousse B, Ourévitch M, Bonnet-Delpon D, Bégué JP. Fluoro artemisinins: difluoromethylene ketones. J Org Chem 2001; 66:7858-63. [PMID: 11701047 DOI: 10.1021/jo0158579] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactions of the ring-contracted aldehydes, derived from anhydrodihydroartemisinin, with gem-difluoroenoxysilanes in the presence of BF(3).Et(2)O afforded the corresponding difluoromethylene ketol adducts in good yields. Similar Lewis acid catalyzed reactions of dihydroartemisinin acetate with the difluoroenoxysilanes provided the 10-substituted difluoromethylene ketones in good to moderate yields. Interestingly enough, the course and the stereochemistry of these reactions are highly dependent on the nature of the Lewis acids used; the addition reaction was accompanied by epimerization at C-9, and the stereochemistry at C-10 depends on the difluoroenoxysilane used. The best results were obtained using SnCl(4) to give the 9alpha,10beta-stereoisomer in high stereoselectivity. When 0.4 equiv of SnCl(4) was used for the reaction with the alpha-(4-methoxyphenylenoxysilane)-beta,beta-difluoroenoxysilane, however, a rearrangement of the endoperoxide was observed.
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Affiliation(s)
- F Chorki
- BIOCIS, CNRS, Faculté de Pharmacie, Rue J.B. Clément, Châtenay-Malabry F-92296, France
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39
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Saleur D, Bouillon JP, Portella C. Bis(acylsilanes) and trifluoromethyltrimethylsilane: a useful system for the synthesis of cyclic 2,2-difluoro-3-trialkylsilyl-1,3-ketols and cyclic 2-fluoro-1,3-diketones(1). J Org Chem 2001; 66:4543-8. [PMID: 11421772 DOI: 10.1021/jo0017077] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a one-pot reaction of bis(acylsilanes) with trifluoromethyltrimethylsilane (TFMTMS) leading to a new family of 2,2-difluoro-3-trialkylsilylketols 4. These compounds were submitted to a facile and effective defluorosilylation. The overall process constitutes a new synthesis of cyclic six- and seven-membered 2-fluoro-1,3-diketones 8, with regiospecific introduction of fluorine. The keto-enol equilibrium of cyclic 1,3-diketones and the mechanism of the defluorosilylation reaction were also studied.
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Affiliation(s)
- D Saleur
- Laboratoire Réactions Sélectives et Applications, Associé au CNRS (UMR 6519), Faculté des Sciences, BP 1039, 51687 Reims Cedex 2, France
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40
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Lefebvre O, Brigaud T, Portella C. Acetyltrimethylsilane, trifluoromethyltrimethylsilane, and prenyl esters: a three-component system for the synthesis of gem-difluoroanalogues of monoterpenes. J Org Chem 2001; 66:4348-51. [PMID: 11397175 DOI: 10.1021/jo010245+] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The preparation of 3,3-difluoro-6-methylhept-5-en-2-one 1, a key intermediate for the synthesis of 4,4-difluoroterpenes, and applications in linalool and geraniol series are described. The process involves 1,1-difluoro-2-trimethylsilyoxypropene, an enol silyl ether prepared from acetyltrimethylsilane and trifluoromethyltrimethylsilane, and its reaction in situ with prenyl benzoate, under catalysis by trimethylsilyl trifluoromethanesulfonate. Optimized conditions leading to either the desired enol silyl ether or the unprecedented methyl(trifluoromethyl)trimethylsilyl carbinol 4 have been achieved. The prenylation of the enol silyl ether gives a 9/1 mixture of regioisomers, in favor of the expected ketone 1. Treatment of 1 with vinylmagnesium bromide leads to (+/-)-4,4-difluorolinalool 7. Reaction with the lithium enolate of ethyl diethylphosphonoacetate, and then LAH reduction, converts 1 to 4,4-difluorogeraniol 11, with complete stereoselectivity.
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Affiliation(s)
- O Lefebvre
- Laboratoire Réactions Sélectives et Applications, Associé au CNRS (UMR 6519), Université de Reims, Faculté des Sciences, B.P. 1039, 51689 Reims Cedex 2, France
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41
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Berber H, Brigaud T, Lefebvre O, Plantier-Royon R, Portella C. Reactions of difluoroenoxysilanes with glycosyl donors: synthesis of difluoro-C-glycosides and difluoro-C-disaccharides. Chemistry 2001; 7:903-9. [PMID: 11288882 DOI: 10.1002/1521-3765(20010216)7:4<903::aid-chem903>3.0.co;2-m] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Difluoroenoxysilanes, prepared from acylsilanes and trifluoromethyltrimethylsilane under fluoride activation, were glycosylated with some glycosyl donors (acylglycosides, glycals) to yield difluoro-C-glycosides with a difluoromethylene group in the place of the anomeric oxygen. This reaction strongly depends on the substituent in the 2-position of the glycosyl donor. Application of this methodology to a xylose-derived acylsilane led to the formation of difluoro-C-disaccharides as an isosteric O-glycosyl mimetic.
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Affiliation(s)
- H Berber
- Laboratoire des Réactions Sélectives et Applications Associé au CNRS (UMR 6519), Université de Reims, Faculté des Sciences, Reims, France
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42
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Lefebvre O, Brigaud T, Portella C. Mixed organofluorine-organosilicon chemistry. 13. One-pot synthesis of difluoroaldols from acylsilanes and trifluoromethyltrimethylsilane. application to the synthesis of a difluoro analogue of egomaketone. J Org Chem 2001; 66:1941-6. [PMID: 11300885 DOI: 10.1021/jo001549j] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Difluoroaldol compounds 3 were synthesized in a one-pot procedure involving an acylsilane 1, trifluoromethyltrimethylsilane (TFMTMS), and an aldehyde. The key intermediate of this reaction is a difluoroenoxysilane 2. Ytterbium triflate proved to be a very efficient catalyst for promoting the aldol type reaction under very mild conditions. The potential of this reaction for the convergent synthesis of difluorinated compounds was illustrated by the synthesis of difluoroegomaketone 7d through dehydration of the corresponding aldol compound 3d.
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Affiliation(s)
- O Lefebvre
- Laboratoire "Réactions Sélectives et Applications", Associé au CNRS (UMR 6519), Université de Reims Champagne-Ardenne, Faculté des Sciences, BP 1039, 51687 Reims Cedex 2, France
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44
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Singh RP, Shreeve JM. Nucleophilic Trifluoromethylation Reactions of Organic Compounds with (Trifluoromethyl)trimethylsilane. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00550-0] [Citation(s) in RCA: 310] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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45
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46
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Mixed organofluorine-organosilicon chemistry. 10. Allylation and benzylation of difluoroenoxysilanes. Application to the synthesis of gem -difluoroterpene analogues. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00348-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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