1
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Rai V, Sorabad GS, Maddani MR. Transition metal free, green and facile halogenation of ketene dithioacetals using a KX–oxidant system. NEW J CHEM 2021. [DOI: 10.1039/d0nj03737k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A facile oxidative halogenation of α-oxo ketene dithioacetals is achieved by using a potassium halide and an oxidant combination under transition metal free conditions at ambient temperature.
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Affiliation(s)
- Vishakha Rai
- Department of Chemistry
- Mangalore University
- 574199 Mangalore
- India
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2
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Westermeyer A, Guillamot G, Phansavath P, Ratovelomanana-Vidal V. Electrophilic ring fluorination of 3,5-disubstituted pyrazoles: application to the formal synthesis of a neprilysin inhibitor key intermediate. NEW J CHEM 2020. [DOI: 10.1039/d0nj05222a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The access to a new family of unusual 4-fluorinated pyrazoles bearing acetal moities at the 3- or 5-position has been achieved by electrophilic fluorination using Selectfluor® with yields up to 67%.
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Affiliation(s)
- Anne Westermeyer
- PSL University
- Chimie ParisTech-CNRS
- Institute of Chemistry for Life & Health Sciences
- CSB2D Team
- 75005 Paris
| | | | - Phannarath Phansavath
- PSL University
- Chimie ParisTech-CNRS
- Institute of Chemistry for Life & Health Sciences
- CSB2D Team
- 75005 Paris
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3
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Balgotra S, Verma PK, Vishwakarma RA, Sawant SD. Catalytic advances in direct functionalizations using arylated hydrazines as the building blocks. CATALYSIS REVIEWS 2019. [DOI: 10.1080/01614940.2019.1702191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Shilpi Balgotra
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Praveen Kumar Verma
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - Ram A. Vishwakarma
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - Sanghapal D. Sawant
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
- Academy of Scientific and Innovative Research, New Delhi, India
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4
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Aqua mediated multicomponent reaction under phase transfer catalysis: A novel and green approach to access fused pyrazoles. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2015.08.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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5
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Deng L, Cao X, Liu Y, Wan JP. In-Water Synthesis of 5-Thiolated 1,2,3-Triazoles from β-Thioenaminones by Diazo Transfer Reaction. J Org Chem 2019; 84:14179-14186. [PMID: 31608630 DOI: 10.1021/acs.joc.9b01817] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The synthesis of 1,2,3-triazoles with a sulfur-based side chain has been accessed with the metal-free annulation reactions of readily available β-thiolated enaminones and tosyl hydrazine. By these reactions with water as the only medium, a broad array of 5-thiolated 1,2,3-triazoles have been synthesized with generally good to excellent yields. Except using TMEDA (N,N,N',N'-tetramethylethylenediamine) as the only base promoter, not any other catalyst or additive is required, thus providing an efficient and environmentally benign method for useful 1,2,3-triazole synthesis.
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Affiliation(s)
- Leiling Deng
- College of Chemistry and Chemical Engineering , Jiangxi Normal University , Nanchang 330022 , People's Republic of China
| | - Xiaoji Cao
- Research Centre of Analysis and Measurement , Zhejiang University of Technology , 18 Chaowang Road , Hangzhou , Zhejiang 310014 , People's Republic of China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering , Jiangxi Normal University , Nanchang 330022 , People's Republic of China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering , Jiangxi Normal University , Nanchang 330022 , People's Republic of China
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6
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Ghosh A, Hegde R, Makane VB, Sridhar B, Rode HB, Patil SA, Dateer RB. Transition metal-free functionalized hydration of alkynes: one-pot synthesis of fluorinated β-keto-imidates using Selectfluor. Org Biomol Chem 2019; 17:4440-4445. [PMID: 30984956 DOI: 10.1039/c9ob00527g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A transition metal-free, four-component one-pot synthesis of polyfunctionalized fluorinated β-keto-imidates via the functionalized hydration of alkynes has been described. The intermediate 1,3-ketoamino moiety was obtained from easily accessible arylpropioladehyde and arlyhydroxylamine and was treated with Selectfluor delivering fluorinated β-keto-imidates. A wide variety of functional groups are tolerated under mild reaction conditions and the product applicability is highlighted.
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Affiliation(s)
- Arnab Ghosh
- Centre for Nano and Material Sciences, Jain Global Campus, JAIN (Deemed-to-be-University), Bangalore, Karnataka 562112, India.
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7
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Levchenko V, Dmytriv YV, Tymtsunik AV, Liubchak K, Rudnichenko A, Melnyk AV, Veselovych SY, Borodulin YV, Otsalyuk OM, Tolmachev AA, Mykhailiuk PK. Preparation of 5-Fluoropyrazoles from Pyrazoles and N-Fluorobenzenesulfonimide (NFSI). J Org Chem 2018; 83:3265-3274. [DOI: 10.1021/acs.joc.8b00199] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vitalina Levchenko
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
| | - Yurii V. Dmytriv
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
- Department of Chemical Technology, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Prosp. Peremohy 37, Kyiv 03056, Ukraine
| | - Andriy V. Tymtsunik
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
- Department of Chemical Technology, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Prosp. Peremohy 37, Kyiv 03056, Ukraine
| | - Konstantin Liubchak
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
| | - Alexander Rudnichenko
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
- Department of Chemistry, National Taras Shevchenko University of Kyiv, Volodymyrska 64, Kyiv 01033, Ukraine
| | - Anton V. Melnyk
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
| | - Stanislav Y. Veselovych
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
| | - Yurii V. Borodulin
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
| | - Oleksandr M. Otsalyuk
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
| | - Andrei A. Tolmachev
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
- Department of Chemistry, National Taras Shevchenko University of Kyiv, Volodymyrska 64, Kyiv 01033, Ukraine
| | - Pavel K. Mykhailiuk
- Enamine Ltd., Chervonotkatska 78, Kyiv 02094, Ukraine (www.enamine.net;
www.mykhailiukchem.org)
- Department of Chemistry, National Taras Shevchenko University of Kyiv, Volodymyrska 64, Kyiv 01033, Ukraine
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8
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Prieto A, Bouyssi D, Monteiro N. Ruthenium-Catalyzed Tandem C-H Fluoromethylation/Cyclization of N-Alkylhydrazones with CBr 3F: Access to 4-Fluoropyrazoles. J Org Chem 2017; 82:3311-3316. [PMID: 28263600 DOI: 10.1021/acs.joc.7b00085] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
4-Fluoropyrazoles are accessible in a single step from readily available aldehyde-derived N-alkylhydrazones through double C-H fluoroalkylation with tribromofluoromethane (CBr3F). RuCl2(PPh3)3 has been proven to be the most efficient catalyst for this transformation when compared to a range of other Cu-, Pd-, or Fe-based catalyst systems.
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Affiliation(s)
- Alexis Prieto
- Univ Lyon, Université Claude Bernard Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, CNRS UMR 5246), F-69622 Villeurbanne, France
| | - Didier Bouyssi
- Univ Lyon, Université Claude Bernard Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, CNRS UMR 5246), F-69622 Villeurbanne, France
| | - Nuno Monteiro
- Univ Lyon, Université Claude Bernard Lyon 1, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS, CNRS UMR 5246), F-69622 Villeurbanne, France
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9
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Yugandar S, Konda S, Parameshwarappa G, Ila H. One-Pot Synthesis of 2,4,5-Trisubstituted Imidazoles via [2 + 2 + 1] Cycloannulation of 1,3-Bishet(aryl)-monothio-1,3-diketones, α-Substituted Methylamines and Sodium Nitrite through α-Nitrosation of Enaminones. J Org Chem 2016; 81:5606-22. [PMID: 27194455 DOI: 10.1021/acs.joc.6b00938] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient one-pot synthesis of a series of diversely functionalized trisubstituted 4(5)het(aroyl)-2,5(4)-het(aryl)/alkylimidazoles from readily available 1,3-bishet(aryl)monothio-1,3-diketones has been reported. This novel sequential one-pot, three step protocol, wherein three new carbon nitrogen bonds are formed in contiguous fashion, involves in situ generation of enaminones by reaction of monothio-1,3-diketones with α-substituted methylamines, followed by their α-nitrosation with sodium nitrite and subsequent base mediated intramolecular heterocyclization of the resulting α-hydroxyiminoimines to trisubstituted imidazoles in high yields under mild conditions. These newly prepared 4(5)-het(aroyl)-5(4)-het(aryl)/alkylimidazoles are shown to exist as tautomeric mixture, however, their subsequent alkylation with methyl iodide in the presence of potassium carbonate affords 1-N-methy-2,5-bishet(aryl)-4-het(aroyl)imidazoles in highly regioselective fashion in most of the cases. Synthesis of few 4(5)-(2-hydroxyphenyl)-2,5(4)-substituted imidazoles, which are known to be good coordinating ligands, has also been reported. A probable mechanism for the formation of these imidazoles from hydroxyiminoimine intermediates has also been suggested.
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Affiliation(s)
- S Yugandar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bangalore-560064, India
| | - S Konda
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bangalore-560064, India
| | - G Parameshwarappa
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bangalore-560064, India
| | - H Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bangalore-560064, India
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10
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Charanraj T, Ramachandra P, Ramesh N, Junjappa H. Fluorination of α-oxoketenedithioacetals: one-pot four-component synthesis of α-fluoro-α-oxoketenedithioacetals. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Affiliation(s)
- Lin Zhang
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Jinhuan Dong
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xianxiu Xu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Qun Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
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12
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Guo Z, Jin C, Zhou J, Su W. Copper(ii)-catalyzed cross dehydrogenative coupling reaction of N-hydroxyphthalimide with alkanes and ethers via unactivated C(sp3)–H activation at room temperature. RSC Adv 2016. [DOI: 10.1039/c6ra14697j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This reaction system shows mild condition and broad substrate scope for generation of O-substituted N-hydroxyphthalimide derivatives via unactivated C(sp3)–H activation.
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Affiliation(s)
- Zhicheng Guo
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Can Jin
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Jiadi Zhou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Weike Su
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- Zhejiang University of Technology
- Hangzhou 310014
- China
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13
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Orrego-Hernández J, Cobo J, Portilla J. Chemoselective Synthesis of 5-Alkylamino-1H-pyrazole-4-carbaldehydes by Cesium- and Copper-Mediated Amination. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500505] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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14
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Fluorine-containing pyrazoles and their condensed derivatives: Synthesis and biological activity. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.03.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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16
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Zhou J, Jin C, Li X, Su W. Copper-catalyzed oxidative esterification of unactivated C(sp3)–H bonds with carboxylic acids via cross dehydrogenative coupling. RSC Adv 2015. [DOI: 10.1039/c4ra14586k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An effective copper-catalyzed esterification of unactivated (non-benzylic and allylic) C(sp3)–H bonds of hydrocarbons with Selectfluor as an oxidant has been developed.
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Affiliation(s)
- Jiadi Zhou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- Zhejiang University of Technology
- Hangzhou 310014
- China
- College of Pharmaceutical Sciences
| | - Can Jin
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- Zhejiang University of Technology
- Hangzhou 310014
- China
- College of Pharmaceutical Sciences
| | - Xiaohan Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- Zhejiang University of Technology
- Hangzhou 310014
- China
- College of Pharmaceutical Sciences
| | - Weike Su
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- Zhejiang University of Technology
- Hangzhou 310014
- China
- College of Pharmaceutical Sciences
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17
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Huang F, Wu P, Wang L, Chen J, Sun C, Yu Z. Copper-Mediated Intramolecular Oxidative C–H/C–H Cross-Coupling of α-Oxo Ketene N,S-Acetals for Indole Synthesis. J Org Chem 2014; 79:10553-60. [DOI: 10.1021/jo5014542] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Fei Huang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Ping Wu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Liandi Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Jiping Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Chenglin Sun
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Zhengkun Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, People’s Republic of China
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18
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Patil D, Chandam D, Mulik A, Jagdale S, Patil P, Deshmukh M. Novel crown ether functionalized imidazolium-based acidic ionic liquid catalyzed synthesis of pyrazole derivatives under solvent-free conditions. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-014-1782-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Singh OM, Devi LR, Lim KB, Lee SG. Regioselective Synthesis of Polyaza Pyrimidines and Polyaza Pyrazoles under One-Pot Multicomponent Reaction Conditions. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Ki Bum Lim
- Department of Chemistry and Research Institute of Natural Science, Graduate School for Molecular Materials and Nanochemistry; Gyeongsang National University; Jinju 660-701 Korea
| | - Sang-Gyeong Lee
- Department of Chemistry and Research Institute of Natural Science, Graduate School for Molecular Materials and Nanochemistry; Gyeongsang National University; Jinju 660-701 Korea
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20
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DMAP-promoted cascade C–S/C–N bonds formation approach to 1,3-thiazolidin-4-ones via annulation of β-ketothioamides with α-halocarboxylic acids at room temperature. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.084] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Gladow D, Doniz-Kettenmann S, Reissig HU. 1,3-Dipolar Cycloadditions of Ethyl 2-Diazo-3,3,3-trifluoropropanoate to Alkynes and [1,5] Sigmatropic Rearrangements of the Resulting 3H-Pyrazoles: Synthesis of Mono-, Bis- and Tris(trifluoromethyl)-Substituted Pyrazoles. Helv Chim Acta 2014. [DOI: 10.1002/hlca.201400032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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22
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Wen LR, Men LB, He T, Ji GJ, Li M. Switching Regioselectivity of β-Ketothioamides by Means of Iodine Catalysis: Synthesis of Thiazolylidenes and 1,4-Dithiines. Chemistry 2014; 20:5028-33. [DOI: 10.1002/chem.201304497] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Indexed: 11/06/2022]
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23
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Arcadi A, Pietropaolo E, Alvino A, Michelet V. Aminofluorination of 2-alkynylanilines: a Au-catalyzed entry to fluorinated indoles. Beilstein J Org Chem 2014; 10:449-58. [PMID: 24605165 PMCID: PMC3943415 DOI: 10.3762/bjoc.10.42] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Accepted: 02/12/2014] [Indexed: 12/18/2022] Open
Abstract
The scope and limitations of gold-catalyzed tandem cycloisomerization/fluorination reactions of unprotected 2-alkynylanilines to have access to 3,3-difluoro-2-aryl-3H-indoles and 3-fluoro-2-arylindoles are described. An unprecedented aminoauration/oxidation/fluorination cascade reaction of 2-alkynylanilines bearing a linear alkyl group on the terminal triple bond is reported.
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Affiliation(s)
- Antonio Arcadi
- Dipartimento di Scienze Fisiche e Chimiche, Università di L'Aquila, Via Vetoio- 67010 Coppito (AQ), Italy
| | - Emanuela Pietropaolo
- Dipartimento di Scienze Fisiche e Chimiche, Università di L'Aquila, Via Vetoio- 67010 Coppito (AQ), Italy
| | - Antonello Alvino
- Dipartimento di Chimica, Sapienza, Università di Roma, P. le A. Moro 5, Roma, Italy
| | - Véronique Michelet
- Institut de Recherche de Chimie Paris, UMR 8247, Ecole Nationale Supérieure de Chimie de Paris, Chimie ParisTech, 11 rue P. et M. Curie, F-75231 Paris Cedex 05, France
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24
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Sar D, Paul R, Sengoden M, Punniyamurthy T. Synthesis of Substituted Pyrazoles from Vinylhydrozones via Bromoamination and Hydroamination with 2,2,6,6-Tetramethylpiperidine-1-oxyl andN-Bromosuccinimide. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201300294] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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25
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Verma GK, Shukla G, Nagaraju A, Srivastava A, Raghuvanshi K, Singh MS. DMAP-promoted domino annulation of β-ketothioamides with internal alkynes: a highly regioselective access to functionalized 1,3-thiazolidin-4-ones at room temperature. RSC Adv 2014. [DOI: 10.1039/c4ra00131a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
One-pot DMAP-mediated regioselective access to functionalized 1,3-thiazolidin-4-ones has been achieved via annulation of β-ketothioamides with internal alkynes.
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Affiliation(s)
- Girijesh Kumar Verma
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005, India
| | - Gaurav Shukla
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005, India
| | - Anugula Nagaraju
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005, India
| | - Abhijeet Srivastava
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005, India
| | - Keshav Raghuvanshi
- Institut fuer Organische und Biomolekulare Chemie
- Georg-August-Universität Göttingen
- 37077 Gottingen, Germany
| | - Maya Shankar Singh
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005, India
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26
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Alizadeh A, Reza Esmaili zand H, Saberi V, Mokhtari J. Synthesis of 5-Aryl-3-(methylsulfanyl)-1H-pyrazolesviaThree-Component Reaction of 1,1-Bis(methylsulfanyl)-2-nitroethene, Aromatic Aldehydes, and Hydrazine. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201300070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Wen LR, He T, Lan MC, Li M. Three-Component Cascade Annulation of β-Ketothioamides Promoted by CF3CH2OH: A Regioselective Synthesis of Tetrasubstituted Thiophenes. J Org Chem 2013; 78:10617-28. [DOI: 10.1021/jo401397d] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Li-Rong Wen
- State Key Laboratory Base
of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Tao He
- State Key Laboratory Base
of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Ming-Chao Lan
- State Key Laboratory Base
of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Ming Li
- State Key Laboratory Base
of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
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Li S, Li Z, Yuan Y, Li Y, Zhang L, Wu Y. Gold(I)-catalyzed aminohalogenation of fluorinated N'-aryl-N-propargyl amidines for the synthesis of imidazole derivatives under mild conditions. Chemistry 2012; 19:1496-501. [PMID: 23255354 DOI: 10.1002/chem.201202402] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Indexed: 11/11/2022]
Abstract
A procedure for the synthesis of fluorinated imidazole derivatives from propargyl amidines has been developed. Under gold(I) catalysis, propargyl amidines were converted into 5-fluoromethyl imidazoles in the presence of Selectfluor through a cascade cyclization/fluorination process. In contrast, imidazole-5-carbaldehydes were obtained in high yields when N-iodosuccinimide (NIS) was used as the halogenating reagent. The polarity of the solvent and light had significant impact on the formation of the carbaldehydes. These transformations showed excellent functional-group tolerance. An unfluorinated substrate with an electron-withdrawing group also underwent aminohalogenation to give the corresponding product in good yield. Mechanistic investigation revealed the general pathways of these transformations.
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Affiliation(s)
- Shan Li
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 345 Lingling Road, Shanghai 200032, PR China
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Liang Y, Zhang YP, Yu W. The reaction of substituted ethyl α-bromocinnamates with tetrabutyl ammonium fluoride. CHINESE CHEM LETT 2012. [DOI: 10.1016/j.cclet.2012.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Meng X, Fang Z, Barry BD, Liao P, Bi X. Direct C(sp2)-H chlorination of ketene dithioacetals using FeCl3 as the chloride source and PhI(OAc)2 as an oxidant. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s11434-012-5139-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jin W, Yu H, Yu Z. Regioselective synthesis of multisubstituted pyrazoles via cyclocondensation of β-thioalkyl-α,β-unsaturated ketones with hydrazines. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.168] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Qian J, Liu Y, Zhu J, Jiang B, Xu Z. A Novel Synthesis of Fluorinated Pyrazoles via Gold(I)-Catalyzed Tandem Aminofluorination of Alkynes in the Presence of Selectfluor. Org Lett 2011; 13:4220-3. [DOI: 10.1021/ol201555z] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jianqiang Qian
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
| | - Yunkui Liu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
| | - Jie Zhu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
| | - Bo Jiang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
| | - Zhenyuan Xu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
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