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Tan Z, Li Z, Jin G, Yu C. Continuous-Flow Process for the Synthesis of 5-Nitro-1,4-dihydro-1,4-methanonaphthalene. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00281] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhiyong Tan
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Chao Wang Road 18, Hangzhou 310014, P. R. China
| | - Zhenhua Li
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Chao Wang Road 18, Hangzhou 310014, P. R. China
| | - Guoqiang Jin
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Chao Wang Road 18, Hangzhou 310014, P. R. China
| | - Chuanming Yu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region, Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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2
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Chang D, Gao F, Shi L. Potassium tert -butoxide-mediated generation of arynes from o -bromoacetophenone derivatives. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Crespi S, Jäger S, König B, Fagnoni M. A Photocatalytic Meerwein Approach to the Synthesis of Isochromanones and Isochromenones. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601458] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Stefano Crespi
- PhotoGreen Lab; Department of Chemistry; University of Pavia; V.le Taramelli 10 27100 Pavia Italy
| | - Stefanie Jäger
- Institut für Organische Chemie; Department of Chemistry; Universität Regensburg; Universitätstraße 31 93053 Regensburg Germany
| | - Burkhard König
- Institut für Organische Chemie; Department of Chemistry; Universität Regensburg; Universitätstraße 31 93053 Regensburg Germany
| | - Maurizio Fagnoni
- PhotoGreen Lab; Department of Chemistry; University of Pavia; V.le Taramelli 10 27100 Pavia Italy
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4
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Li J, Chen S, Wang Z, Zhang Q. Pyrene-fused Acenes and Azaacenes: Synthesis and Applications. CHEM REC 2016; 16:1518-30. [DOI: 10.1002/tcr.201600015] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Junbo Li
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, 693 Xiongchu Avenue; Wuhan Hubei 430073 P. R. China
- School of Materials Science and Engineering, Nanyang Technological University; 50 Nanyang Avenue Singapore 639738
| | - Shao Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, 693 Xiongchu Avenue; Wuhan Hubei 430073 P. R. China
| | - Zilong Wang
- School of Materials Science and Engineering, Nanyang Technological University; 50 Nanyang Avenue Singapore 639738
| | - Qichun Zhang
- School of Materials Science and Engineering, Nanyang Technological University; 50 Nanyang Avenue Singapore 639738
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences, Nanyang Technological University; SPMS-04-01, 21 Nanyang Link Singapore 637371
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Chen Q, Yu H, Xu Z, Lin L, Jiang X, Wang R. Development and Application of O-(Trimethylsilyl)aryl Fluorosulfates for the Synthesis of Arynes. J Org Chem 2015; 80:6890-6. [DOI: 10.1021/acs.joc.5b00923] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Qiao Chen
- Institute
of New Drugs Design and Synthesis, Key Laboratory of Preclinical Study
for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Hongmei Yu
- Institute
of New Drugs Design and Synthesis, Key Laboratory of Preclinical Study
for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Zhaoqing Xu
- Institute
of New Drugs Design and Synthesis, Key Laboratory of Preclinical Study
for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Li Lin
- Institute
of New Drugs Design and Synthesis, Key Laboratory of Preclinical Study
for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Xianxing Jiang
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Rui Wang
- Institute
of New Drugs Design and Synthesis, Key Laboratory of Preclinical Study
for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
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Xu W, Xu Q, Li J. Sandmeyer cyanation of arenediazonium tetrafluoroborate using acetonitrile as a cyanide source. Org Chem Front 2015. [DOI: 10.1039/c4qo00301b] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Palladium-catalyzed cyanation of aryldiazonium tetrafluoroborate using acetonitrile as a non-metallic cyanide source was achieved in the presence of Ag2O under ambient air, eliminating the involvement of highly toxic CuCN used in the traditional Sandmeyer reaction, in which the CN group comes from metallic cyanides.
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Affiliation(s)
- Wenbin Xu
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Qinghui Xu
- 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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Koch R, Blanch RJ, Wentrup C. Ketene–Ketene Interconversion. 6-Carbonylcyclohexa-2,4-dienone–Hepta-1,2,4,6-tetraene-1,7-dione–6-Oxocyclohexa-2,4-dienylidene and Wolff Rearrangement to Fulven-6-one. J Org Chem 2014; 79:6978-86. [DOI: 10.1021/jo5011087] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rainer Koch
- Institut
für Chemie and Center of Interface Science, Carl von Ossietzky Universität Oldenburg, P.O. Box 2503, 26111 Oldenburg, Germany
| | - Rodney J. Blanch
- School
of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Qld 4072, Australia
| | - Curt Wentrup
- School
of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Qld 4072, Australia
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Chronopoulos D, Karousis N, Ichihashi T, Yudasaka M, Iijima S, Tagmatarchis N. Benzyne cycloaddition onto carbon nanohorns. NANOSCALE 2013; 5:6388-6394. [PMID: 23736828 DOI: 10.1039/c3nr01755a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A facile approach for the covalent functionalization of carbon nanohorns (CNHs) based on the benzyne cycloaddition reaction is presented. The benzynes were in situ generated from either anthranilic acid by decomposition of the internal benzenediazonium-2-carboxylate or from 2-(trimethylsilyl)-phenyl triflate by fluoride ion attack at the silicon atom followed by displacement of the trimethylsilyl group under mild conditions. Moreover, the functionalization reaction was tested and performed under conventional conditions as well as under microwave irradiation. Modified CNHs possessing fused rings onto their graphitic skeleton were fully characterized by means of complementary spectroscopic techniques, thermogravimetric analysis, electron microscopy and light scattering. Moreover, Sonogashira coupling with propargyl alcohol followed by condensation with thioctic acid, to the iodo-modified CNHs obtained from the cycloaddition reaction of 2-amino-5-iodobenzoic acid with CNHs, resulted in the preparation of a new CNH-based material in which endocyclic disulfides are extended from the fused rings onto CNHs. The latter moieties were used to immobilize gold nanoparticles, furnishing the CNH-Au(nano) hybrid material, in which the former were identified with the aid of UV-Vis and EDX spectroscopy.
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Affiliation(s)
- Demetrios Chronopoulos
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece.
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Browne DL, Wright S, Deadman BJ, Dunnage S, Baxendale IR, Turner RM, Ley SV. Continuous flow reaction monitoring using an on-line miniature mass spectrometer. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2012; 26:1999-2010. [PMID: 22847699 DOI: 10.1002/rcm.6312] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
RATIONALE A recently developed miniature electrospray ionisation mass spectrometer has been coupled to a preparative flow chemistry system in order to monitor reactive intermediates and competing reaction paths, screen starting materials, and optimise reaction conditions. Although ideally suited to the application, mass spectrometers have rarely been used in this way, as traditional instruments are too bulky to be conveniently coupled to flow chemistry platforms. METHODS A six-port switching valve fitted with a 5 μL loop was used to periodically sample the flow stream leaving the reactor coil. Mass spectra corresponding to the sample loop contents were observed approximately 10 s after activating the valve. High fluidic pressure was maintained throughout to ensure that gaseous products remained in solution. As an illustrative example of how this apparatus can be employed, the generation of benzyne and its subsequent reaction with furan were investigated. Benzyne was prepared via diazotisation of anthranilic acid using tert-butyl nitrite. RESULTS Unexpectedly, the explosive diazotised intermediate was detected by the mass spectrometer at low coil temperatures or short residence times. The optimum reactor temperature and residence time for production of the desired Diels-Alder product are 50 °C and 3-5 min, respectively. There are competing reaction pathways leading to the formation of acridone and several other by-products. CONCLUSIONS On-line mass spectrometry allowed the flow conditions to be quickly tuned for safe operation and optimal generation of the desired product. The validity of this approach was corroborated by off-line liquid chromatography/mass spectrometry (LC/MS) analysis of flow samples.
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Affiliation(s)
- Duncan L Browne
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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Kovács S, Csincsi ÁI, Nagy TZ, Boros S, Timári G, Novák Z. Design and Application of New Imidazolylsulfonate-Based Benzyne Precursor: An Efficient Triflate Alternative. Org Lett 2012; 14:2022-5. [DOI: 10.1021/ol300529j] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Szabolcs Kovács
- Institute of Chemistry, Eötvös Loránd University, Pázmány Péter stny 1/a, H-1117 Budapest, Hungary, and Sanofi, Chinoin Zrt, Tó utca 1-4, H-1045 Budapest, Hungary
| | - Ádám I. Csincsi
- Institute of Chemistry, Eötvös Loránd University, Pázmány Péter stny 1/a, H-1117 Budapest, Hungary, and Sanofi, Chinoin Zrt, Tó utca 1-4, H-1045 Budapest, Hungary
| | - Tibor Zs. Nagy
- Institute of Chemistry, Eötvös Loránd University, Pázmány Péter stny 1/a, H-1117 Budapest, Hungary, and Sanofi, Chinoin Zrt, Tó utca 1-4, H-1045 Budapest, Hungary
| | - Sándor Boros
- Institute of Chemistry, Eötvös Loránd University, Pázmány Péter stny 1/a, H-1117 Budapest, Hungary, and Sanofi, Chinoin Zrt, Tó utca 1-4, H-1045 Budapest, Hungary
| | - Géza Timári
- Institute of Chemistry, Eötvös Loránd University, Pázmány Péter stny 1/a, H-1117 Budapest, Hungary, and Sanofi, Chinoin Zrt, Tó utca 1-4, H-1045 Budapest, Hungary
| | - Zoltán Novák
- Institute of Chemistry, Eötvös Loránd University, Pázmány Péter stny 1/a, H-1117 Budapest, Hungary, and Sanofi, Chinoin Zrt, Tó utca 1-4, H-1045 Budapest, Hungary
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Hwu JR, Hsu YC. Stereospecific benzyne-induced olefination from β-amino alcohols and its application to the total synthesis of (-)-1-deoxy-D-fructose. Chemistry 2011; 17:4727-31. [PMID: 21365692 DOI: 10.1002/chem.201001735] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2010] [Revised: 12/21/2010] [Indexed: 11/10/2022]
Affiliation(s)
- Jih Ru Hwu
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC.
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12
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Wang GW, Zhu B. A facile access to [60]fullerene-fused δ-lactones: unexpected reaction pathway of benzenediazonium-2-carboxylates controlled by organic bases. Chem Commun (Camb) 2009:1769-71. [DOI: 10.1039/b820395d] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cossu S, De Lucchi O. A mild alternative to the use of benzyne in [4+2]-cycloaddition reactions. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00877-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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The generation and reactions of 3,4-didehydro-2H-[1]benzopyran, a highly strained heterocycle. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(95)02382-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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