201
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Chen H, He Y, Zhou L. A photocatalytic decarboxylative/defluorinative [4 + 3] annulation of o-hydroxyphenylacetic acids and trifluoromethyl alkenes: synthesis of fluorinated dihydrobenzoxepines. Org Chem Front 2018. [DOI: 10.1039/c8qo00970h] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A photocatalytic decarboxylative/defluorinative [4 + 3] annulation of o-hydroxyphenylacetic acids and trifluoromethyl alkenes was developed. The reaction led to fluorinated dihydrobenzoxepines through two consecutive C–F substitutions in a CF3 group.
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Affiliation(s)
- Haoguo Chen
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Yuwei He
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Lei Zhou
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
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202
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Johansen MB, Lindhardt AT. Nucleophilic fluorination facilitated by a CsF–CaF2 packed bed reactor in continuous flow. Chem Commun (Camb) 2018; 54:825-828. [DOI: 10.1039/c7cc09035h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple to prepare, dry and handle packed bed reactor carrying CsF on CaF2, towards nucleophilic fluorinations in continuous flow, is reported.
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Affiliation(s)
- M. B. Johansen
- Department of Engineering
- Center for Carbon Dioxide Activation (CADIAC)
- Interdisciplinary Nanoscience Centre (iNANO)
- Aarhus University
- DK-8200 Aarhus N
| | - A. T. Lindhardt
- Department of Engineering
- Center for Carbon Dioxide Activation (CADIAC)
- Interdisciplinary Nanoscience Centre (iNANO)
- Aarhus University
- DK-8200 Aarhus N
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203
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Wu Y, Zhang B, Zheng Y, Wang Y, Lei X. Cs2CO3-promoted defluorination and functionalization of α-CF3carbonyl compounds in the presence ofN-,O-, and/orS-nucleophiles. RSC Adv 2018; 8:16019-16023. [PMID: 35542242 PMCID: PMC9080061 DOI: 10.1039/c8ra02353k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 04/13/2018] [Indexed: 11/21/2022] Open
Abstract
A simple, efficient, and mild method for defluorination and functionalization of 3,3,3-trifluoro carbonyl compounds has been developed. In the present method, Cs2CO3 can easily convert α-trifluoromethyl esters, amides, and ketones into β,β-S-, O- and/or N-substituted α,β-unsaturated carbonyl compounds in the presence of N-, O-, and S-nucleophiles with moderate to excellent yields, and furthermore, this transformation with α-trifluoromethyl ester and a series of 2-aminophenols can result in benzooxazoles in good yields. Cs2CO3-promoted defluorination and functionalization of α-CF3 carbonyl compounds.![]()
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Affiliation(s)
- Yue Wu
- School of Pharmacy
- Fudan University
- Shanghai 201203
- China
| | | | - Yinying Zheng
- School of Pharmacy
- Fudan University
- Shanghai 201203
- China
| | - Yuheng Wang
- School of Pharmacy
- Fudan University
- Shanghai 201203
- China
| | - Xinsheng Lei
- School of Pharmacy
- Fudan University
- Shanghai 201203
- China
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204
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Pliego JR. Potassium fluoride activation for the nucleophilic fluorination reaction using 18-crown-6, [2.2.2]-cryptand, pentaethylene glycol and comparison with the new hydro-crown scaffold: a theoretical analysis. Org Biomol Chem 2018; 16:3127-3137. [DOI: 10.1039/c8ob00418h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Ion-pair binding in the hydro-crown ether leads to more effective catalytic cycle for nucleophilic fluorination.
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Affiliation(s)
- Josefredo R. Pliego
- Departamento de Ciências Naturais
- Universidade Federal de São João del-Rei
- São João del-Rei
- Brazil
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205
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Szpera R, Kovalenko N, Natarajan K, Paillard N, Linclau B. The synthesis of the 2,3-difluorobutan-1,4-diol diastereomers. Beilstein J Org Chem 2017; 13:2883-2887. [PMID: 30018668 PMCID: PMC5753060 DOI: 10.3762/bjoc.13.280] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 12/13/2017] [Indexed: 12/05/2022] Open
Abstract
The diastereoselective synthesis of fluorinated building blocks that contain chiral fluorine substituents is of interest. Here we describe optimisation efforts in the synthesis of anti-2,3-difluorobutane-1,4-diol, as well as the synthesis of the corresponding syn-diastereomer. Both targets were synthesised using an epoxide opening strategy.
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Affiliation(s)
- Robert Szpera
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Nadia Kovalenko
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Kalaiselvi Natarajan
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Nina Paillard
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Bruno Linclau
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
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206
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Melnykov SV, Pataman AS, Dmytriv YV, Shishkina SV, Vovk MV, Sukach VA. Regioselective decarboxylative addition of malonic acid and its mono(thio)esters to 4-trifluoromethylpyrimidin-2(1 H)-ones. Beilstein J Org Chem 2017; 13:2617-2625. [PMID: 29259672 PMCID: PMC5727768 DOI: 10.3762/bjoc.13.259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 11/20/2017] [Indexed: 01/07/2023] Open
Abstract
Background: Due to the high reactivity towards various C-nucleophiles, trifluoromethylketimines are known to be useful reagents for the synthesis of α-trifluoromethylated amine derivatives. However, decarboxylative reactions with malonic acid and its mono(thio)esters have been poorly investigated so far despite the potential to become a convenient route to β-trifluoromethyl-β-amino acid derivatives and to their partially saturated heterocyclic analogues. Results: In this paper we show that 4-trifluoromethylpyrimidin-2(1H)-ones, unique heterocyclic ketimines, react with malonic acid under organic base catalysis to regioselectively provide either Michael- or Mannich-type decarboxylative addition products depending on solvent polarity. Malonic mono(thio)esters give exclusively Michael-type products. The two regioisomeric products can be converted into saturated (2-oxohexahydropyrimidin-4-yl)acetic acid derivatives by mild hydrogenation of the endocyclic C=C double bond in the presence of Pd/C as catalyst. The cis-stereoisomers selectively formed upon reduction of the Michael-type products were structurally determined by X-ray diffraction. As a result of this study, a number of novel acetic acid derivatives containing trifluoromethylated, partially or fully saturated 2-oxopyrimidine cores were prepared and characterized as promising building blocks. Conclusions: Regio- and stereoselective protocols have been developed for the synthesis of novel isomeric 4(6)-trifluoromethylated 1,2,3,4-tetrahydro- and perhydro-(2-oxopyrimidin-4-yl)acetic acid derivatives.
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Affiliation(s)
- Sergii V Melnykov
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, 5 Murmanska str., Kyiv 02660, Ukraine
| | | | - Yurii V Dmytriv
- Enamine LTD, 78 Chervonotkats'ka str., Kyiv 02094, Ukraine.,National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37 Peremohy ave., Kyiv 03056, Ukraine
| | - Svitlana V Shishkina
- STC ''Institute for Single Crystals'', National Academy of Sciences of Ukraine, 60 Nauky ave., Kharkiv 61001, Ukraine.,Department of Inorganic Chemisrtry, V.M. Karasin Kharkiv National University, 4 Svobody sq, Kharkiv 61122, Ukraine
| | - Mykhailo V Vovk
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, 5 Murmanska str., Kyiv 02660, Ukraine
| | - Volodymyr A Sukach
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, 5 Murmanska str., Kyiv 02660, Ukraine
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207
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Zhao CL, Yang J, Han ZZ, Zhang CP. Structure-dependent selective O - or C -trifluoroethylation of 1,3-dicarbonyls by mesityl(2,2,2-trifluoroethyl)iodonium triflate. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.09.009] [Citation(s) in RCA: 6] [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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208
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Tokárová Z, Balogh R, Tisovský P, Hrnčariková K, Végh D. Direct nucleophilic substitution of polyfluorobenzenes with pyrrole and 2,5-dimethylpyrrole. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.10.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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209
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Amal Joseph PJ, Priyadarshini S. Copper-Mediated C–X Functionalization of Aryl Halides. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00285] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- P. J. Amal Joseph
- Department
of Chemistry, St. Albert’s College, Ernakulam, Kerala 682018, India
| | - S. Priyadarshini
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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210
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Chen H, Liu Z, Lv Y, Tan X, Shen H, Yu HZ, Li C. Selective Radical Fluorination of Tertiary Alkyl Halides at Room Temperature. Angew Chem Int Ed Engl 2017; 56:15411-15415. [DOI: 10.1002/anie.201708197] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/27/2017] [Indexed: 11/10/2022]
Affiliation(s)
- He Chen
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Zhonglin Liu
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Ying Lv
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials; Anhui University; Hefei Anhui 230601 P. R. China
| | - Xinqiang Tan
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Haigen Shen
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Hai-Zhu Yu
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials; Anhui University; Hefei Anhui 230601 P. R. China
| | - Chaozhong Li
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
- School of Materials and Chemical Engineering; Ningbo University of Technology; 201 Fenghua Road Ningbo 315211 P. R. China
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211
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212
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Hariss L, Hadir KB, El-Masri M, Roisnel T, Grée R, Hachem A. Preparation of imidazo[1,2- a]- N-heterocyclic derivatives with gem-difluorinated side chains. Beilstein J Org Chem 2017; 13:2115-2121. [PMID: 29062431 PMCID: PMC5647726 DOI: 10.3762/bjoc.13.208] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 09/27/2017] [Indexed: 11/23/2022] Open
Abstract
Using an aerobic oxidative coupling, different new imidazo[1,2-a]-N-heterocycles with gem-difluroroalkyl side chains have been prepared in fair yields by the reaction of gem-difluoroenones with aminopyridines, -pyrimidines and -pyridazines. Condensed heterocycles of this type play an important role as key core structures of various bioactive compounds. Further, starting with a chloroimidazopyridazine derivative, Pd-catalyzed coupling reactions as well as nucleophilic substitutions have been performed successfully in order to increase the molecular diversity.
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Affiliation(s)
- Layal Hariss
- Laboratory for Medicinal Chemistry and Natural Products, Lebanese University, Faculty of Sciences (1) and PRASE-EDST, Hadath, Beirut, Lebanon
| | - Kamal Bou Hadir
- American University of Beirut, Department of Chemistry, Beirut 11-0236, Lebanon
| | - Mirvat El-Masri
- Laboratory for Medicinal Chemistry and Natural Products, Lebanese University, Faculty of Sciences (1) and PRASE-EDST, Hadath, Beirut, Lebanon
| | - Thierry Roisnel
- Université de Rennes 1, Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - René Grée
- Université de Rennes 1, Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - Ali Hachem
- Laboratory for Medicinal Chemistry and Natural Products, Lebanese University, Faculty of Sciences (1) and PRASE-EDST, Hadath, Beirut, Lebanon
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213
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Wei XJ, Boon W, Hessel V, Noël T. Visible-Light Photocatalytic Decarboxylation of α,β-Unsaturated Carboxylic Acids: Facile Access to Stereoselective Difluoromethylated Styrenes in Batch and Flow. ACS Catal 2017; 7:7136-7140. [PMID: 29109904 PMCID: PMC5666695 DOI: 10.1021/acscatal.7b03019] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 09/09/2017] [Indexed: 01/03/2023]
Abstract
![]()
The
development of synthetic methodologies which provide access
to both stereoisomers of α,β-disubstituted olefins is
a challenging undertaking. Herein, we describe the development of
an operationally simple and stereoselective synthesis of difluoromethylated
styrenes via a visible-light photocatalytic decarboxylation strategy
using fac-Ir(ppy)3 as the photocatalyst.
Meta- and para-substituted cinnamic acids provide the expected E-isomer. In contrast, ortho-substituted
cinnamic acids yield selectively the less stable Z-product, whereas the E-isomer can be obtained via
continuous-flow processing through accurate control of the reaction
time. Furthermore, our protocol is amenable to the decarboxylative
difluoromethylation of aryl propiolic acids.
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Affiliation(s)
- Xiao-Jing Wei
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Wout Boon
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Volker Hessel
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Timothy Noël
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
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214
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Zhao Q, Xiang H, Xiao JA, Xia PJ, Wang JJ, Chen X, Yang H. Selectfluor-Triggered Tandem Cyclization of o-Hydroxyarylenaminones To Access Difluorinated 2-Amino-Substituted Chromanones. J Org Chem 2017; 82:9837-9843. [DOI: 10.1021/acs.joc.7b01339] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qinglan Zhao
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Haoyue Xiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Jun-An Xiao
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Peng-Ju Xia
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Jun-Jie Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Xiaoqing Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Hua Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
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215
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Nosik PS, Gerasov AO, Boiko RO, Rusanov E, Ryabukhin SV, Grygorenko OO, Volochnyuk DM. Gram-Scale Synthesis of Amines Bearing a gem
-Difluorocyclopropane Moiety. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700857] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Pavel S. Nosik
- Spectrum Info Ltd.; Life Chemicals Inc.; Murmanska Street 5 Kyiv 02094 Ukraine
- Institute of Organic Chemistry; National Academy of Sciences of Ukraine; Murmanska Street 5 Kyiv 02094 Ukraine
| | - Andrii O. Gerasov
- Spectrum Info Ltd.; Life Chemicals Inc.; Murmanska Street 5 Kyiv 02094 Ukraine
| | - Rodion O. Boiko
- Spectrum Info Ltd.; Life Chemicals Inc.; Murmanska Street 5 Kyiv 02094 Ukraine
| | - Eduard Rusanov
- Institute of Organic Chemistry; National Academy of Sciences of Ukraine; Murmanska Street 5 Kyiv 02094 Ukraine
| | - Sergey V. Ryabukhin
- National Taras Shevchenko University of Kyiv; Volodymyrska Street 64 Kyiv 01601 Ukraine
| | | | - Dmitriy M. Volochnyuk
- Institute of Organic Chemistry; National Academy of Sciences of Ukraine; Murmanska Street 5 Kyiv 02094 Ukraine
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216
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Eisenstein O, Milani J, Perutz RN. Selectivity of C–H Activation and Competition between C–H and C–F Bond Activation at Fluorocarbons. Chem Rev 2017; 117:8710-8753. [DOI: 10.1021/acs.chemrev.7b00163] [Citation(s) in RCA: 221] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Odile Eisenstein
- Institut
Charles Gerhardt, UMR 5253 CNRS Université Montpellier, cc 1501,
Place E. Bataillon, 34095 Montpellier, France
- Centre
for Theoretical and Computational Chemistry (CTCC), Department of
Chemistry, University of Oslo, P.O. Box 1033, Blindern, 0315 Oslo, Norway
| | - Jessica Milani
- Department
of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Robin N. Perutz
- Department
of Chemistry, University of York, York YO10 5DD, United Kingdom
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217
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Zaikin PA, Dyan OT, Evtushok DV, Usoltsev AN, Borodkin GI, Karpova EV, Shubin VG. Solvent-Free Fluorination of Electron-Rich Aromatic Compounds with F-TEDA-BF4
: Toward “Dry” Processes. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700179] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pavel A. Zaikin
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences; 9 Acad. Lavrentiev Ave. 630090 Novosibirsk Russian Federation
| | - Ok Ton Dyan
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences; 9 Acad. Lavrentiev Ave. 630090 Novosibirsk Russian Federation
| | - Darya V. Evtushok
- A. V. Nikolaev Institute of Inorganic Chemistry of the Siberian Branch of Russian Academy of Sciences; 3 Acad. Lavrentiev Ave. 630090 Novosibirsk Russian Federation
| | - Andrey N. Usoltsev
- A. V. Nikolaev Institute of Inorganic Chemistry of the Siberian Branch of Russian Academy of Sciences; 3 Acad. Lavrentiev Ave. 630090 Novosibirsk Russian Federation
| | - Gennady I. Borodkin
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences; 9 Acad. Lavrentiev Ave. 630090 Novosibirsk Russian Federation
- Department of Natural Sciences; Novosibirsk State University; 2 Pirogov St 630090 Novosibirsk Russian Federation
| | - Elena V. Karpova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences; 9 Acad. Lavrentiev Ave. 630090 Novosibirsk Russian Federation
- Department of Natural Sciences; Novosibirsk State University; 2 Pirogov St 630090 Novosibirsk Russian Federation
| | - Vyacheslav G. Shubin
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences; 9 Acad. Lavrentiev Ave. 630090 Novosibirsk Russian Federation
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218
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Yang B, Chansaenpak K, Wu H, Zhu L, Wang M, Li Z, Lu H. Silver-promoted (radio)fluorination of unsaturated carbamates via a radical process. Chem Commun (Camb) 2017; 53:3497-3500. [PMID: 28280814 DOI: 10.1039/c7cc01393k] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The intramolecular fluorocyclization of unsaturated carbamates is described here using a hypervalent iodine reagent in the presence of a silver catalyst. Both (hetero)aryl-substituted olefins and acrylamides can be utilized as effective substrates. Preliminary mechanistic investigations suggest that the reaction proceeds via a cyclization/1,2-(hetero)aryl migration/fluorination cascade involving an unusual radical process. Furthermore, starting from no-carrier-added [18F]TBAF, a simple one-pot, two-step cascade method was developed for the generation of 18F-labeled heterocycles with high radiochemical purity.
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Affiliation(s)
- Bin Yang
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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219
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Burmaoglu S, Algul O, Gobek A, Aktas Anil D, Ulger M, Erturk BG, Kaplan E, Dogen A, Aslan G. Design of potent fluoro-substituted chalcones as antimicrobial agents. J Enzyme Inhib Med Chem 2017; 32:490-495. [PMID: 28118738 PMCID: PMC6010113 DOI: 10.1080/14756366.2016.1265517] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Owing to ever-increasing bacterial and fungal drug resistance, we attempted to develop novel antitubercular and antimicrobial agents. For this purpose, we developed some new fluorine-substituted chalcone analogs (3, 4, 9–15, and 20–23) using a structure–activity relationship approach. Target compounds were evaluated for their antitubercular efficacy against Mycobacterium tuberculosis H37Rv and antimicrobial activity against five common pathogenic bacterial and three common fungal strains. Three derivatives (3, 9, and 10) displayed significant antitubercular activity with IC50 values of ≤16,760. Compounds derived from trimethoxy substituent scaffolds with monofluoro substitution on the B ring of the chalcone structure exhibited superior inhibition activity compared to corresponding hydroxy analogs. In terms of antimicrobial activity, most compounds (3, 9, 12–14, and 23) exhibited moderate to potent activity against the bacteria, and the antifungal activities of compounds 3, 13, 15, 20, and 22 were comparable to those of reference drugs ampicillin and fluconazole.
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Affiliation(s)
- Serdar Burmaoglu
- a Tercan Vocational High School, Erzincan University , Erzincan , Turkey.,b Department of Chemistry, Faculty of Science , Ataturk University , Erzurum , Turkey
| | - Oztekin Algul
- c Department of Pharmaceutical Chemistry, Faculty of Pharmacy , Mersin University , Mersin , Turkey
| | - Arzu Gobek
- b Department of Chemistry, Faculty of Science , Ataturk University , Erzurum , Turkey
| | - Derya Aktas Anil
- b Department of Chemistry, Faculty of Science , Ataturk University , Erzurum , Turkey
| | - Mahmut Ulger
- d Department of Pharmaceutical Microbiology, Faculty of Pharmacy , Mersin University , Mersin , Turkey
| | - Busra Gul Erturk
- c Department of Pharmaceutical Chemistry, Faculty of Pharmacy , Mersin University , Mersin , Turkey
| | - Engin Kaplan
- e Advanced Technology Education, Research, and Application Center, Mersin University , Mersin , Turkey
| | - Aylin Dogen
- d Department of Pharmaceutical Microbiology, Faculty of Pharmacy , Mersin University , Mersin , Turkey
| | - Gönül Aslan
- f Department of Medical Microbiology, Faculty of Medicine , Mersin University , Mersin , Turkey
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220
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Hazlitt RA, Tran QL, Sowaileh MF, Colby DA. Generation of Magnesium Pentafluoropropen-2-olate from Hexafluoroisopropanol and Synthesis of 2,2,4,4,4-Pentafluoro-3,3-dihydroxyketones. J Org Chem 2017; 82:2231-2236. [PMID: 28107014 PMCID: PMC7500852 DOI: 10.1021/acs.joc.6b02863] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
2,2,4,4,4-Pentafluoro-3,3-dihydroxyketones are valuable precursors to difluoroenolates following fragmentation during the release of trifluoroacetate; however, there are few synthetic strategies to prepare this unique class of compound. We addressed this issue and report a mild, two-step synthesis of 2,2,4,4,4-pentafluoro-3,3-dihydroxyketones from aldehydes. Specifically, aldehydes are treated with pentafluoropropen-2-olate, generated from a new fragmentation of hexafluoroisopropanol with a mixed Mg/Li amide, to give pentafluoroalcohols. A subsequent oxidation with Dess-Martin periodinane provides the targets in good isolated yields.
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Affiliation(s)
- Robert A. Hazlitt
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677
| | - Que-Lynn Tran
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677
| | - Munia F. Sowaileh
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677
| | - David A. Colby
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677
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221
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Li Y, Qiu G, Wang H, Sheng J. Generation of trifluoromethyl thiolsulphonate through one-pot reaction of sulfonyl chloride and trifluoromethanesulfanylamides. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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222
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Ding J, Zhang Y, Li J. Nickel-catalyzed selective C-5 fluorination of 8-aminoquinolines with NFSI. Org Chem Front 2017. [DOI: 10.1039/c7qo00211d] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The first nickel-catalyzed selective C-5 fluorination of 8-aminoquinoline derivatives was achieved using NFSI as the “F” source.
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Affiliation(s)
- Junshuai Ding
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Yingchao Zhang
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Jizhen Li
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun
- China
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223
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Naveen N, Balamurugan R. Catalyst free synthesis of α-fluoro-β-hydroxy ketones/α-fluoro-ynols via electrophilic fluorination of tertiary propargyl alcohols using Selectfluor™ (F-TEDA-BF4). Org Biomol Chem 2017; 15:2063-2072. [DOI: 10.1039/c7ob00140a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile access to α-fluoro-β-hydroxyketones via electrophilic fluorination.
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224
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Chen MT, Tang XY, Shi M. A facile approach for the trifluoromethylthiolation of methylenecyclopropanes. Org Chem Front 2017. [DOI: 10.1039/c6qo00536e] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trifluoromethylthiolation of methylenecyclopropanes (MCPs) has been developed by using AgSCF3/Na2S2O8as a trifluoromethylthiolation source (SCF3) to give trifluoromethylthiolated 1,2-dihydronaphthalene derivatives in moderate to good yields.
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Affiliation(s)
- Min-Tao Chen
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- University of Chinese Academy of Sciences
- Shanghai 200032
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- University of Chinese Academy of Sciences
- Shanghai 200032
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- University of Chinese Academy of Sciences
- Shanghai 200032
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225
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Han WY, Zhao J, Wang JS, Xiang GY, Zhang DL, Bai M, Cui BD, Wan NW, Chen YZ. Diastereoselective [3 + 2] cycloaddition of 3-ylideneoxindoles with in situ generated CF2HCHN2: syntheses of CF2H-containing spirooxindoles. Org Biomol Chem 2017. [DOI: 10.1039/c7ob01266g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Structurally diverse CF2H-containing spirooxindoles were constructed through a [3 + 2] cycloaddition of isatin-derived 3-ylideneoxindoles with in situ generated CF2HCHN2.
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Affiliation(s)
- Wen-Yong Han
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
| | - Jia Zhao
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
| | - Jian-Shu Wang
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
| | - Guang-Yan Xiang
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
| | - Ding-Lei Zhang
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
| | - Mei Bai
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
| | - Bao-Dong Cui
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
| | - Nan-Wei Wan
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
| | - Yong-Zheng Chen
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi
- China
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226
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Xiang H, Zhao Q, Tang Z, Xiao J, Xia P, Wang C, Yang C, Chen X, Yang H. Visible-Light-Driven, Radical-Triggered Tandem Cyclization of o-Hydroxyaryl Enaminones: Facile Access to 3-CF 2 /CF 3-Containing Chromones. Org Lett 2016; 19:146-149. [PMID: 27936762 DOI: 10.1021/acs.orglett.6b03441] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A practical and straightforward synthetic route to construct a variety of 3-CF2/CF3-containing chromones via photoredox catalysis was developed. This novel protocol features a visible-light-induced radical-triggered tandem cyclization.
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Affiliation(s)
- Haoyue Xiang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Qinglan Zhao
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Zhenyu Tang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Junan Xiao
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Pengju Xia
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Chaoming Wang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Chunhao Yang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203, P. R. China
| | - Xiaoqing Chen
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
| | - Hua Yang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P. R. China
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