1
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Deeksha, Bittu, Singh R. Synthetic strategies for the construction of C3-fluorinated oxindoles. Org Biomol Chem 2023; 21:6456-6467. [PMID: 37531214 DOI: 10.1039/d3ob01012k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
C3-fluorinated oxindoles are important scaffolds known to demonstrate various biological properties. As bio-isosteres of oxindoles, these compounds have shown tremendous potential in drug research discovery programs. Besides, they also serve as starting materials for synthesizing other fluorine-containing new architectures, thus launching research for developing new methods for their synthesis. Consequently, various approaches have been developed over the years to synthesize C3-fluorinated oxindoles. This review highlights the strategies developed to date to access C3-difluoro and monofluorooxindoles via intermolecular and intramolecular approaches. The key findings of the strategies developed are discussed along with the prevailing mechanism.
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Affiliation(s)
- Deeksha
- Department of Chemistry, Central University of Rajasthan, Ajmer, Rajasthan 305817, India.
| | - Bittu
- Department of Chemistry, Central University of Rajasthan, Ajmer, Rajasthan 305817, India.
| | - Ritesh Singh
- Department of Chemistry, Central University of Rajasthan, Ajmer, Rajasthan 305817, India.
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2
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Pradeep SD, Gopalakrishnan AK, Manoharan DK, Soumya RS, Gopalan RK, Mohanan PV. Isatin derived novel Schiff bases: An efficient pharmacophore for versatile biological applications. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Schiff Bases of Isatin and Adamantane-1-Carbohydrazide: Synthesis, Characterization and Anticonvulsant Activity. J CHEM-NY 2021. [DOI: 10.1155/2021/6659156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Epilepsy is the most common neurological condition and cause of substantial morbidity and mortality. In the present study, the molecular hybridization tool was adopted to obtain six Schiff bases of isatin and adamantane-1-carbohydrazide (18–23). Then, their anticonvulsant activity was evaluated using pentylenetetrazole- (PTZ-) induced seizure model using phenobarbitone as a positive control. Our findings showed that compounds 18–23 provided significant protection against PTZ-induced seizure, and maximum activities were associated with compound 23. Moreover, all investigated compounds increased the latency of induced convulsion and reduced the duration of epilepsy with compound 23 being the best. Interestingly, most of the synthesized molecules showed reduction in neurological symptoms and severity of the seizure. Molecular docking studies suggest GABA-A receptor as a potential target, and in silico ADME screening revealed that the pharmaceutical properties of compound 23 are within the specified limit. Thus, compound 23 was identified as a promising candidate that warrants further drug discovery processes.
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4
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Synthesis, molecular modeling and antiviral activity of novel 5-fluoro-1H-indole-2,3-dione 3-thiosemicarbazones. Bioorg Chem 2020; 104:104202. [PMID: 32892069 DOI: 10.1016/j.bioorg.2020.104202] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/11/2020] [Accepted: 08/18/2020] [Indexed: 11/20/2022]
Abstract
In this work, novel 5-fluoro-1-methyl/ethyl-1H-indole-2,3-dione 3-[4-(substituted phenyl)-thiosemicarbazones] 6a-n and 7a-n were synthesized. The antiviral effects of the compounds were tested against HSV-1 (KOS), HSV-2 (G) HSV-1 TK- KOS ACVr and VV in HEL cell cultures using acyclovir and ganciclovir as standards, and Coxsackie B4 virus in Vero cell cultures using ribavirin and mycophenolic acid as standards. R2 ethyl substituted 7 derivatives were found effective against viruses tested. R1 4-CF3 substituted 7d, R1 4-OCH3 substituted 7 g and R1 3-Cl substituted 7 l showed activity against HSV-1 (KOS), HSV-2 (G) HSV-1 TK- KOS ACVr and VV. Whereas only R1 4-Br substituted 7n has selective activity against coxsackie B4 virus. Molecular modelingstudies of 7d and 7l were performed to determine binding side on HSV-1 glycoprotein B and D, HSV-2 glycoprotein B structures.
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5
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Guney T, Wenderski TA, Boudreau MW, Tan DS. Synthesis of Benzannulated Medium-ring Lactams via a Tandem Oxidative Dearomatization-Ring Expansion Reaction. Chemistry 2018; 24:13150-13157. [PMID: 29936701 PMCID: PMC6242278 DOI: 10.1002/chem.201802880] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Indexed: 12/19/2022]
Abstract
Medium-ring natural products exhibit diverse biological activities but such scaffolds are underrepresented in probe and drug discovery efforts due to the limitations of classical macrocyclization reactions. We report herein a tandem oxidative dearomatization-ring-expanding rearomatization (ODRE) reaction that generates benzannulated medium-ring lactams directly from simple bicyclic substrates. The reaction accommodates diverse aryl substrates (haloarenes, aryl ethers, aryl amides, heterocycles) and strategic incorporation of a bridgehead alcohol generates a versatile ketone moiety in the products amenable to downstream modifications. Cheminformatic analysis indicates that these medium rings access regions of chemical space that overlap with related natural products and are distinct from synthetic drugs, setting the stage for their use in discovery screening against novel biological targets.
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Affiliation(s)
- Tezcan Guney
- Dr. T. Guney, Dr. T. A. W enderski, Prof. Dr. D. S. Tan,
Chemical Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer
Center, 1275 York Avenue, Box 422, New York, New York, 10065, USA
| | - Todd A. Wenderski
- Dr. T. Guney, Dr. T. A. W enderski, Prof. Dr. D. S. Tan,
Chemical Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer
Center, 1275 York Avenue, Box 422, New York, New York, 10065, USA
| | - Matthew W. Boudreau
- M. W. Boudreau, Gerstner Sloan Kettering Summer
Undergraduate Research Program, Memorial Sloan Kettering Cancer Center, 1275 York
Avenue, Box 422, New York, New York, 10065, USA
| | - Derek S. Tan
- Dr. T. Guney, Dr. T. A. W enderski, Prof. Dr. D. S. Tan,
Chemical Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer
Center, 1275 York Avenue, Box 422, New York, New York, 10065, USA
- Prof. Dr. D. S. Tan, Tri-Institutional Research Program,
Memorial Sloan Kettering Cancer Center, 1275 York Avenue, Box 422, New York, New
York, 10065, USA
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6
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Aretz CD, Escobedo H, Cowen BJ. Cyclopentane Formation from Flexible Precursors Using Samarium(II) Reagents. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christopher D. Aretz
- Department of Chemistry & Biochemistry; University of Denver; 2190 E. Iliff Ave. 80208 Denver CO USA
| | - Humberto Escobedo
- Department of Chemistry & Biochemistry; University of Denver; 2190 E. Iliff Ave. 80208 Denver CO USA
| | - Bryan J. Cowen
- Department of Chemistry & Biochemistry; University of Denver; 2190 E. Iliff Ave. 80208 Denver CO USA
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7
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Almutairi MS, Zakaria AS, Ignasius PP, Al-Wabli RI, Joe IH, Attia MI. Synthesis, spectroscopic investigations, DFT studies, molecular docking and antimicrobial potential of certain new indole-isatin molecular hybrids: Experimental and theoretical approaches. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.10.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Abstract
The copper(II) trifluoromethanesulfonate-catalyzed Pummerer reaction of β-ketosulfoxides with 1,3-dicarbonyl compounds or π-nucleophiles such as phenols, arenes, and tetraallylsilane is reported. The mild conditions provide an efficient entry to a novel class of polysubstituted 3-alkylthiofuran and polysubstituted 3-thiobenzofuran heterocycles from readily available materials.
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Affiliation(s)
- Regev Parnes
- Department of Chemistry, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
| | - Hagai Reiss
- Department of Chemistry, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
| | - Doron Pappo
- Department of Chemistry, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
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9
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Ji H, Zhu Y, Shao Y, Liu J, Yuan Y, Jia X. Active sp3 C–H Bond Oxidation Initiated sp3–sp2 Consecutive C–H Functionalization of N-Arylglycine Amides: Construction of Isatins. J Org Chem 2017; 82:9859-9865. [DOI: 10.1021/acs.joc.7b01480] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Honghe Ji
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yingzu Zhu
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yu Shao
- School
of Information Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Jing Liu
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yu Yuan
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Xiaodong Jia
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
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10
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Copper-catalyzed Pummerer type reaction of α -thio aryl/heteroarylacetates: Synthesis of aryl/heteroaryl α -keto esters. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.03.069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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11
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Mao H, You BX, Zhou LJ, Xie TT, Wen YH, Lv X, Wang XX. SmI2-mediated reductive cyclization of β-arylthio ketones: a facile and diastereoselective synthesis of thiochroman derivatives. Org Biomol Chem 2017; 15:6157-6166. [DOI: 10.1039/c7ob01082f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
SmI2-mediated reductive cyclization of β-arylthio ketones afforded a general approach to dihydrothiochroman-ols in good yields and high degrees of diastereoselectivity.
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Affiliation(s)
- Hui Mao
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Bing-Xin You
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Lie-Jin Zhou
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Ting-Ting Xie
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Yi-Hang Wen
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Xin Lv
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
| | - Xiao-Xia Wang
- Department of Chemistry
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- People's Republic of China
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12
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Wei XJ, Wang L, Du SF, Wu LZ, Liu Q. Visible-light photoredox intramolecular difluoroacetamidation: facile synthesis of 3,3-difluoro-2-oxindoles from bromodifluoroacetamides. Org Biomol Chem 2016; 14:2195-9. [PMID: 26794806 DOI: 10.1039/c5ob02121a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report an operationally simple, visible-light-driven protocol for intramolecular C-H difluoroacetamidation of arenes for the synthesis of biologically relevant 3,3-difluoro-2-oxindoles at room temperature. Using fac-Ir(ppy)3 as a photocatalyst and a 3 W blue LED as a light source, an array of difluoroxindoles was prepared from rapidly available tertiary aryl bromodifluoroacetamides in moderate to excellent yields.
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Affiliation(s)
- Xiao-Jing Wei
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
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13
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Zhao HW, Li B, Tian T, Song XQ, Pang HL, Chen XQ, Yang Z, Meng W. Facile construction of novel imidazolidine-spirooxindoles via diastereoselective cycloaddition of N-acylhydrazine-derived imines with 3-isothiocyanato oxindoles. RSC Adv 2016. [DOI: 10.1039/c6ra01962e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Diastereoselective cycloaddition of N-acylhydrazine-derived imines with 3-isothiocyanato oxindoles forming novel imidazolidine-spirooxindoles.
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Affiliation(s)
- Hong-Wu Zhao
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Bo Li
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Ting Tian
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Xiu-Qing Song
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Hai-Liang Pang
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Xiao-Qin Chen
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Zhao Yang
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
| | - Wei Meng
- College of Life Science and Bio-engineering
- Beijing University of Technology
- Beijing 100124
- P. R. China
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14
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Parnes R, Pappo D. Reductive Alkylation of Arenes by a Thiol-Based Multicomponent Reaction. Org Lett 2015; 17:2924-7. [DOI: 10.1021/acs.orglett.5b01142] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Regev Parnes
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Doron Pappo
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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15
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Just-Baringo X, Procter DJ. Sm(II)-Mediated Electron Transfer to Carboxylic Acid Derivatives: Development of Complexity-Generating Cascades. Acc Chem Res 2015; 48:1263-75. [PMID: 25871998 DOI: 10.1021/acs.accounts.5b00083] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Reductive electron transfer (ET) to organic compounds is a powerful method for the activation of substrates via the formation of radicals, radical anions, anions, and dianions that can be exploited in bond-cleaving and bond-forming processes. Since its introduction to the synthetic community in 1977 by Kagan, SmI2 has become one of the most important reducing agents available in the laboratory. Despite its widespread application in aldehyde and ketone reduction, it was widely accepted that carboxylic acid derivatives could not be reduced by SmI2; only recently has our work led to this dogma being overturned, and the reduction of carboxylic acid derivatives using SmI2 can now take its place alongside aldehyde/ketone reduction as a powerful activation mode for synthesis. In this Account, we set out our studies of the reduction of carboxylic acid derivatives using SmI2, SmI2-H2O, and SmI2-H2O-NR3 and the exploitation of the unusual radical anions that are now accessible in unprecedented carbon-carbon bond-forming processes. The Account begins with our serendipitous discovery that SmI2 mixed with H2O is able to reduce six-membered lactones to diols, a transformation previously thought to be impossible. After the successful development of selective monoreductions of Meldrum's acid and barbituric acid heterocyclic feedstocks, we then identified the SmI2-H2O-NR3 reagent system for the efficient reduction of a range of acyclic carboxylic acid derivatives that typically present a significant challenge for ET reductants. Mechanistic studies have led us to propose a common mechanism for the reduction of carboxylic acid derivatives using Sm(II), with only subtle changes observed as the carboxylic acid derivative and Sm(II) reagent system are varied. At the center of our postulated mechanism is the proposed reversibility of the first ET to the carbonyl of carboxylic acid derivatives, and this led us to devise several strategies that allow the radical anion intermediates to be exploited productively in efficient new processes. First, we have used internal directing groups in substrates to "switch on" productive ET to esters and amides and have exploited such an approach in tag-removal cyclization processes that deliver molecular scaffolds of significance in biology and materials science. Second, we have exploited external ligands to facilitate ET to carboxylic acid derivatives and have applied the strategy in telescoped reaction sequences. Finally, we have employed follow-up cyclizations with alkenes, alkynes, and allenes to intercept radical anion intermediates formed along the reaction path and have employed this strategy in complexity-generating cascade approaches to biologically significant molecular architectures. From our studies, it is now clear that Sm(II)-mediated ET to carboxylic acid derivatives constitutes a general strategy for inverting the polarity of the carbonyl, allowing nucleophilic carbon-centered radicals to be formed and exploited in novel chemical processes.
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Affiliation(s)
| | - David J. Procter
- School of Chemistry, University of Manchester, Manchester M13 9PL, U.K
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16
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17
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Parnes R, Narute S, Pappo D. Thiol-promoted selective addition of ketones to aldehydes. Org Lett 2014; 16:5922-5. [PMID: 25376009 DOI: 10.1021/ol502937n] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A simple and efficient thiol-mediated addition of ketones to aromatic and aliphatic aldehydes is reported. This thermodynamically controlled Pummerer/aldol reaction, which can tolerate both moisture and protic functional groups, provides a direct entry to syn-β-thioketones in high chemo- and regioselectivity. Mechanistic studies revealed that selective transformation of the aldehyde to an electrophilic thionium ion species concurrent with the generation of a nucleophilic vinyl sulfide coupling partner from the ketone is imposing cross-coupling over dimerization.
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Affiliation(s)
- Regev Parnes
- Department of Chemistry, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel
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18
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Choudhary S, Muthyala MK, Kumar A. Ionic liquid phase synthesis (IoLiPS) of 2-aminothiazoles and imidazo[1,2-a]pyridines. RSC Adv 2014. [DOI: 10.1039/c4ra08009b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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19
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Levick MT, Grace I, Dai SY, Kasch N, Muryn C, Lambert C, Turner ML, Procter DJ. A Sm(II)-Mediated Cascade Approach to Dibenzoindolo[3,2-b]carbazoles: Synthesis and Evaluation. Org Lett 2014; 16:2292-5. [DOI: 10.1021/ol500841b] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew T. Levick
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Iain Grace
- Department
of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Sheng-Yao Dai
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Nicholas Kasch
- School
of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, U.K
| | - Christopher Muryn
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Colin Lambert
- Department
of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Michael L. Turner
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - David J. Procter
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
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20
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Rumer JW, Levick M, Dai SY, Rossbauer S, Huang Z, Biniek L, Anthopoulos TD, Durrant JR, Procter DJ, McCulloch I. BPTs: thiophene-flanked benzodipyrrolidone conjugated polymers for ambipolar organic transistors. Chem Commun (Camb) 2013; 49:4465-7. [DOI: 10.1039/c3cc40811f] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Rumer JW, Dai SY, Levick M, Biniek L, Procter DJ, McCulloch I. Synthesis of two dihydropyrroloindoledione-based copolymers for organic electronics. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26471] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Levick MT, Coote SC, Grace I, Lambert C, Turner ML, Procter DJ. Phase Tag-Assisted Synthesis of Benzo[b]carbazole End-Capped Oligothiophenes. Org Lett 2012; 14:5744-7. [DOI: 10.1021/ol302748h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew T. Levick
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Susannah C. Coote
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Iain Grace
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Colin Lambert
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - Michael L. Turner
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
| | - David J. Procter
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K., and Department of Physics, Lancaster University, Lancaster, LA1 4YB, U.K
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23
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Lim YH, Ong Q, Duong HA, Nguyen TM, Johannes CW. Direct conversion of indoles to 3,3-difluoro-2-oxindoles via electrophilic fluorination. Org Lett 2012; 14:5676-9. [PMID: 23101562 DOI: 10.1021/ol302666d] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
3,3-Difluoro-2-oxindoles can be obtained directly from indoles in moderate yields via electrophilic fluorination using N-fluorobenzenesulfonimide as a mild fluorinating reagent. The presence of tert-butyl hydroperoxide during the reaction, together with additional heating after quenching the reaction with triethylamine, is beneficial to the formation of the desired product.
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Affiliation(s)
- Yee Hwee Lim
- Organic Chemistry, Institute of Chemical and Engineering Sciences (ICES), Agency for Science, Technology and Research (A*STAR), 11 Biopolis Way, The Helios Block, #03-08, Singapore 138667.
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24
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Szostak M, Procter DJ. Jenseits von Samariumdiiodid: Perspektiven für Lanthanoid(II)-vermittelte Reduktionen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201065] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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25
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Szostak M, Procter DJ. Beyond Samarium Diiodide: Vistas in Reductive Chemistry Mediated by Lanthanides(II). Angew Chem Int Ed Engl 2012; 51:9238-56. [DOI: 10.1002/anie.201201065] [Citation(s) in RCA: 134] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 04/03/2012] [Indexed: 11/11/2022]
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26
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Binary fluorous tagging enables the synthesis and separation of a 16-stereoisomer library of macrosphelides. Nat Chem 2012; 4:124-9. [PMID: 22270645 PMCID: PMC3269761 DOI: 10.1038/nchem.1233] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Accepted: 11/21/2011] [Indexed: 11/08/2022]
Abstract
Fluorous mixture synthesis minimizes the effort to synthesize small-molecule libraries by labelling the molecules rather than the reaction vessels. Reactants are labelled with fluorinated tags and products can later be demixed based on the fluorine content. A limit in the number of available tags can be overcome by using binary encoding so that a total of four tags can label uniquely a library of 16 compounds. This strategy, however, means that separation based on fluorine content alone is not possible. Here, we solve this problem by selectively removing one tag after an initial demixing step; a second demixing provides each individual compound. The usefulness of this strategy is demonstrated by the synthesis of a library that contains all 16 diastereomers of the natural products macrosphelides A and E. Macrosphelide D was not in this library, and so its assigned structure was incorrect. We determined its constitution by using NMR spectroscopy and its configuration by synthesizing four candidate stereoisomers.
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Lin R, Ding S, Shi Z, Jiao N. An Efficient Difluorohydroxylation of Indoles Using Selectfluor as a Fluorinating Reagent. Org Lett 2011; 13:4498-501. [DOI: 10.1021/ol201896p] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Riyuan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China, and State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Shengtao Ding
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China, and State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Zhuangzhi Shi
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China, and State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China, and State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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Synthetic and Biological Applications of Fluorous Reagents as Phase Tags. Top Curr Chem (Cham) 2011; 308:45-67. [DOI: 10.1007/128_2011_263] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Coote SC, Quenum S, Procter DJ. Exploiting Sm(ii) and Sm(iii) in SmI2-initiated reaction cascades: application in a tag removal–cyclisation approach to spirooxindole scaffolds. Org Biomol Chem 2011; 9:5104-8. [DOI: 10.1039/c1ob05710c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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30
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Smith LHS, Nguyen TT, Sneddon HF, Procter DJ. Synthesis of the ABH rings of ecteinascidin 597 using a connective Pummerer-type cyclisation. Chem Commun (Camb) 2011; 47:10821-3. [DOI: 10.1039/c1cc13992d] [Citation(s) in RCA: 17] [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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Smith L, Coote S, Sneddon H, Procter D. Jenseits der Pummerer-Reaktion: Entwicklungen in der Chemie der Thioniumionen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000517] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Smith L, Coote S, Sneddon H, Procter D. Beyond the Pummerer Reaction: Recent Developments in Thionium Ion Chemistry. Angew Chem Int Ed Engl 2010; 49:5832-44. [DOI: 10.1002/anie.201000517] [Citation(s) in RCA: 263] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Casnati A, Cavallo G, Metrangolo P, Resnati G, Ugozzoli F, Ungaro R. The Role of Building-Block Metrics in the Halogen-Bonding-Driven Self-Assembly of Calixarenes, Inorganic Salts and Diiodoperfluoroalkanes. Chemistry 2009; 15:7903-7912. [DOI: 10.1002/chem.200900771] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Affiliation(s)
- Wei Zhang
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, Massachusetts 02125
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35
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Ovens C, Vogel JC, Martin NG, Procter DJ. Intramolecular aryl transfer to thionium ions in an approach to α-arylacetamides. Chem Commun (Camb) 2009:3101-3. [DOI: 10.1039/b904577e] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Miller M, Vogel JC, Tsang W, Merrit A, Procter DJ. Formation of N-heterocycles by the reaction of thiols with glyoxamides: exploring a connective Pummerer-type cyclisation. Org Biomol Chem 2008; 7:589-97. [PMID: 19156326 DOI: 10.1039/b816608k] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of thiols with glyoxamides provides a convenient method for the generation of thionium ions and the initiation of Pummerer-type reactions. When the glyoxamides contain tethered aromatic nucleophiles, N-heterocycles are formed by a thionium ion cyclisation. The scope and mechanism of the connective Pummerer-type process has been investigated using a range of thiols, Lewis acids and both mono- and bis-glyoxamides. The utility of the process has been illustrated in a synthesis of the indoloquinoline natural product, neocryptolepine.
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Affiliation(s)
- Marc Miller
- School of Chemistry, Oxford Road, The University of Manchester, Manchester, UKM13 9PL
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Dolle RE, Bourdonnec BL, Goodman AJ, Morales GA, Thomas CJ, Zhang W. Comprehensive Survey of Chemical Libraries for Drug Discovery and Chemical Biology: 2007. ACTA ACUST UNITED AC 2008; 10:753-802. [PMID: 18991466 DOI: 10.1021/cc800119z] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Roland E. Dolle
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Bertrand Le Bourdonnec
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Allan J. Goodman
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Guillermo A. Morales
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Craig J. Thomas
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
| | - Wei Zhang
- Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, Semafore Pharmaceuticals Inc., 8496 Georgetown Road, Indianapolis, Indiana 46268, NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, Rockville, Maryland 20850, and Department of Chemistry, University of Massachusetts, 100 Morrissey Boulevard, Boston, Massachusetts 02125
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Surry D, Buchwald S. Biarylphosphanliganden in der palladiumkatalysierten Aminierung. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200800497] [Citation(s) in RCA: 500] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Ovens C, Martin NG, Procter DJ. A Dearomatizing, Thionium Ion Cyclization for the Synthesis of Functionalized, Azaspirocyclic Cyclohexadienones. Org Lett 2008; 10:1441-4. [DOI: 10.1021/ol8002095] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Caroline Ovens
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom, and AstraZeneca, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, United Kingdom
| | - Nathaniel G. Martin
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom, and AstraZeneca, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, United Kingdom
| | - David J. Procter
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom, and AstraZeneca, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, United Kingdom
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James KM, Willetts N, Procter DJ. Samarium(II)−Mediated Linker Cleavage−Cyclization in Fluorous Synthesis: Reactions of Samarium Enolates. Org Lett 2008; 10:1203-6. [DOI: 10.1021/ol800070y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karen M. James
- The School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, and Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, U.K
| | - Nigel Willetts
- The School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, and Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, U.K
| | - David J. Procter
- The School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, and Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, U.K
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Abstract
Palladium-catalyzed amination reactions of aryl halides have undergone rapid development in the last 12 years, largely driven by the implementation of new classes of ligands. Biaryl phosphanes have proven to provide especially active catalysts in this context. This Review discusses the application of these catalysts in C-N cross-coupling reactions in the synthesis of heterocycles and pharmaceuticals, in materials science, and in natural product synthesis.
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Affiliation(s)
- David S Surry
- Department of Chemistry, Room 18-490, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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42
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Zhang W, Cai C. New chemical and biological applications of fluorous technologies. Chem Commun (Camb) 2008:5686-94. [DOI: 10.1039/b812433g] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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43
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Separation of a mixture of paraconic acids from Cetraria islandica (L.) Ach. employing a fluorous tag—catch and release strategy. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.06.077] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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