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Sosnovskikh VY. Synthesis and reactivity of 3-(1-alkynyl)chromones. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr5008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
For the first time, the literature data on the methods of synthesis and reactivity of 3-(1-alkynyl)chromones are summarized and systematized. The main method for obtaining these compounds is the Sonogashira cross-coupling reaction of 3-halochromones with terminal acetylenes, and their most important chemical properties include the transformation into furans, reactions with dinucleophiles, ambiphilic [4+2]- and [4+3]-cyclizations, and also dimerization and mixed condensation of 2-methyl-3-(1-alkynyl)chromones due to the vinylogous methyl group. Except for the oxacyclization to furans, chemical transformations of 3-(1-alkynyl)chromones are accompanied by pyrone ring transformation, in which not only the carbonyl group but also the triple bond can participate. This significantly increases the synthetic value of these compounds and ensures the production of more complex heterocyclic systems based on them. The mechanisms of the reactions are discussed, the conditions for their implementation and the yields of the resulting products are indicated.
The bibliography includes 80 references.
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Cui H, Wang X, Zhao C, Pu Y, Wang Y. Selective alkylation of β-anhydroicaritine and their biological evaluation on anticancer. Nat Prod Res 2020; 36:2032-2036. [PMID: 33172306 DOI: 10.1080/14786419.2020.1844686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A convenient and selective alkylation of icaritin has been developed. The methodology involved initial formation of β-anhydroicaritine (3) under acidic conditions followed by selective methylation at the C-3 position and then alkylation at C-5 position. Several alkylated β-anhydroicaritine derivatives were synthesised using this methodology. These newly synthesised derivatives, especially the compounds 5b, 5c and 5j, significantly suppressed cell proliferation when tested against cancer cell lines in vitro. Compound 5j (R = Bn) exhibited a competitive inhibition against MCF7 in vivo compared to tamoxifen.
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Affiliation(s)
- Hanqi Cui
- Department of Medicinal Chemistry, Zunyi Medical University, Zunyi City, China
| | - Xianheng Wang
- Department of Medicinal Chemistry, Zunyi Medical University, Zunyi City, China
| | - Changkuo Zhao
- Department of Medicinal Chemistry, Zunyi Medical University, Zunyi City, China
| | - Yue Pu
- Department of Medicinal Chemistry, Zunyi Medical University, Zunyi City, China
| | - Yuhe Wang
- Department of Pharmacy, Zunyi Medical University Affiliated Hospital, Zunyi, China
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Santos R, Pinto D, Magalhães C, Silva A. Halogenated Flavones and Isoflavones: A State-of-Art on their Synthesis. Curr Org Synth 2020; 17:415-425. [PMID: 32473000 DOI: 10.2174/1570179417666200530213737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/04/2020] [Accepted: 05/04/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Flavonoid is a family of compounds present in the everyday consumption plants and fruits, contributing to a balanced diet and beneficial health effects. Being a scaffold for new drugs and presenting a wide range of applicability in the treatment of illnesses give them also an impact in medicine. Among the several types of flavonoids, flavone and isoflavone derivatives can be highlighted due to their prevalence in nature and biological activities already established. The standard synthetic route to obtain both halogenated flavones and isoflavones is through the use of already halogenated starting materials. Halogenation of the flavone and isoflavone core is less common because it is more complicated and involves some selectivity issues. OBJECTIVE Considering the importance of these flavonoids, we aim to present the main and more recent synthetic approaches towards their halogenation. METHODS The most prominent methodologies for the synthesis of halogenated flavones and isoflavones were reviewed. A careful survey of the reported data, using mainly the Scopus database and halogenation, flavones and isoflavones as keywords, was conducted. RESULTS Herein, a review is provided on the latest and more efficient halogenation protocols of flavones and isoflavones. Selective halogenation and the greener methodologies, including enzymatic and microbial halogenations, were reported. Nevertheless, some interesting protocols that allowed the synthesis of halogenated flavone and isoflavone derivatives in specific positions using halogenated reagents are also summarized. CONCLUSION Halogenated flavones and isoflavones have risen as noticeable structures; however, most of the time, the synthetic procedures involve toxic reagents and harsh reaction conditions. Therefore, the development of new synthetic routes with low environmental impact is desirable.
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Affiliation(s)
- Ricardo Santos
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Diana Pinto
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Clara Magalhães
- Department of Chemistry and CICECO, Universidade de Aveiro, Aveiro, Portugal
| | - Artur Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
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Suresh N, Prasanna GL, Rao MVB, Pal M. Ultrasound assisted synthesis of 6-flavonyl substituted 1,4-dihydro-benzo[d][1,3]oxazin-2-ones via Suzuki–Miyaura coupling under Pd/C catalysis. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.05.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Yasaka N, Kishikawa N, Higashijima T, Ohyama K, Kuroda N. The Utility of Sonogashira Coupling Reaction for the Derivatization of Aryl Halides with Fluorescent Alkyne. ANAL SCI 2018; 34:1183-1188. [PMID: 30305595 DOI: 10.2116/analsci.18p117] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Aryl halides are a very important category of compounds that include many vital drugs and key industrial additives, such as clofibrate and bromobenzene, respectively. Due to their importance, our research group previously developed a novel fluorescence labeling approach for their analysis using a fluorescent aryl boronic acid as a reagent, based on the Suzuki coupling reaction. This coupling reaction was successfully applied for the determination of aryl halides in biological fluids; however, there was a limitation of low reactivity towards ortho-substituted aryl halides. In the present study, a novel fluorescence derivatization approach for aryl halides was developed using, 2-(4-ethynylphenyl)-4,5-diphenyl-1H-imidazole (DIB-ET) as a fluorescent alkyne reagent, based on the Sonogashira coupling reaction. DIB-ET reacted with aryl bromides in the presence of palladium and copper as catalysts, yielding fluorescent derivatives that could be subsequently determined by an HPLC system with fluorescence detection. The detection limits (S/N = 3) for aryl bromides were in the range of 14 - 23 nM, which is 3.5 - 18-times more sensitive than our previously developed approach, Suzuki coupling derivatization. Moreover, in contrast to the previous technique, the reactivity of DIB-ET to ortho-substituted aryl bromides was almost equivalent to that of the para-substituted aryl bromides. Hence, by using this newly developed approach we could label the aryl halides with more sensitivity and reactivity. Finally, the proposed method was successfully applied for the selective determination of aryl bromides in human serum with good recovery (84.6 - 107%), which proves the ability of the developed method to determine occupational exposure to aryl halides.
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Affiliation(s)
- Naoyuki Yasaka
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University
| | - Naoya Kishikawa
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University
| | - Takumi Higashijima
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University
| | - Kaname Ohyama
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University
| | - Naotaka Kuroda
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University
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Xiao ZP, Wei W, Liu Q, Wang PF, Luo X, Chen FY, Cao Y, Huang HX, Liu MM, Zhu HL. C-7 modified flavonoids as novel tyrosyl-tRNA synthetase inhibitors. RSC Adv 2017. [DOI: 10.1039/c6ra28061g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Twenty C-7 modified flavonoids were designed and synthesized.
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Patil PH, Fernandes RA. Unimolecular tetrakis-piperidine-4-ol: an efficient ligand for copper and amine free Sonogashira coupling. RSC Adv 2015. [DOI: 10.1039/c5ra07754k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Unimolecular tetrakis-4-hydroxypiperidine catalysed Cu and amine free Sonogashira coupling of various aryliodides/bromides and alkyl or aryl terminal alkynes giving access to internal arylalkynes is reported.
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Affiliation(s)
- Pradnya H. Patil
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Rodney A. Fernandes
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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8
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Synthesis of 3-oxo-1,4-diazepine-5-carboxamides and 6-(4-oxo-chromen-3-yl)-pyrazinones via sequential Ugi 4CC/Staudinger/intramolecular nucleophilic cyclization and Ugi 4CC/Staudinger/aza-Wittig reactions. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.102] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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9
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Voltrova S, Srogl J. Sonogashira cross-coupling under non-basic conditions. Flow chemistry as a new paradigm in reaction control. Org Chem Front 2014. [DOI: 10.1039/c4qo00198b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Sonogashira reaction under non-basic conditions.
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Affiliation(s)
- Svatava Voltrova
- Institute of Organic Chemistry and Biochemistry
- Academy of Sciences of the Czech Republic
- 166 10 Prague, Czech Republic
| | - Jiri Srogl
- Institute of Organic Chemistry and Biochemistry
- Academy of Sciences of the Czech Republic
- 166 10 Prague, Czech Republic
- Department of Chemical and Biomolecular Engineering
- North Carolina State University
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10
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Gorja DR, Shiva Kumar K, Dulla B, Mukkanti K, Pal M. Pd/C-Mediated Alkynylation of Indazoles: Synthesis and Pharmacological Evaluation of Mono and Dialkynyl-Substituted Indazoles. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1602] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- D. R. Gorja
- Institute of Life Sciences; University of Hyderabad Campus; Gachibowli Hyderabad 500 046 India
| | - K. Shiva Kumar
- Institute of Life Sciences; University of Hyderabad Campus; Gachibowli Hyderabad 500 046 India
| | - B. Dulla
- Institute of Life Sciences; University of Hyderabad Campus; Gachibowli Hyderabad 500 046 India
| | - K. Mukkanti
- Chemistry Division, Institute of Science and Technology; JNT University; Kukatpally Hyderabad 500 072 India
| | - M. Pal
- Institute of Life Sciences; University of Hyderabad Campus; Gachibowli Hyderabad 500 046 India
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11
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Bakherad M. Recent progress and current applications of Sonogashira coupling reaction in water. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.2931] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mohammad Bakherad
- School of Chemistry; Shahrood University of Technology; Shahrood Iran
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Lewin G, Maciuk A, Moncomble A, Cornard JP. Enhancement of the water solubility of flavone glycosides by disruption of molecular planarity of the aglycone moiety. JOURNAL OF NATURAL PRODUCTS 2013; 76:8-12. [PMID: 23249276 DOI: 10.1021/np300460a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Enhancement of the water solubility by disruption of molecular planarity has recently been reviewed as a feasible approach in small-molecule drug discovery programs. We applied this strategy to some natural flavone glycosides, especially diosmin, a highly insoluble citroflavonoid prescribed as an oral phlebotropic drug. Disruption of planarity at the aglycone moiety by 3-bromination or chlorination afforded 3-bromo- and 3-chlorodiosmin, displaying a dramatic solubility increase compared with the parent compound.
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Affiliation(s)
- Guy Lewin
- Laboratoire de Pharmacognosie, Faculté de Pharmacie, Université Paris-Sud BIOCIS UMR-8076 CNRS LabEx LERMIT, Avenue J.B. Clément, 92296 Châtenay-Malabry Cedex, France.
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Abstract
Sonogashira reaction of bromochromones and -flavones with a bromine atom on their benzene or heterocyclic ring with various terminal alkynes gave the desired products with nearly the same efficiency as the previously used iodine derivatives. The coupling reactions were performed in the presence of [tetrakis(triphenylphosphine)palladium(0)], copper(i) co-catalyst, and triethylamine, resulting in the formation of numerous hitherto unknown alkynylated oxygen heterocycles, and provide further proof for the applicability of this reaction for these O-heterocycles. Chromones with ethynyl functionality were prepared by removal of the trimethylsilyl protecting group and used as terminal alkynes in a second cross-coupling reaction.
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Arunkumar K, Naresh Kumar Reddy D, Chandrasekhar K, Rajender Kumar P, Shiva Kumar K, Pal M. Catalysis by zeolite leading to the construction of thiazole ring: an improved synthesis of 4-alkynyl substituted thiazoles. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.05.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Lee T, Gong YD. Solid-phase parallel synthesis of drug-like artificial 2H-benzopyran libraries. Molecules 2012; 17:5467-96. [PMID: 22572931 PMCID: PMC6268589 DOI: 10.3390/molecules17055467] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 04/25/2012] [Accepted: 05/07/2012] [Indexed: 12/21/2022] Open
Abstract
This review covers the construction of drug-like 2H-benzopyrans and related libraries using solid-phase parallel synthesis. In this context, the preparation of substituted benzopyrans such as mono-, di- and trisubstituted benzopyran derivatives and additional ring-fused benzopyrans such as benzopyranoisoxazoles, benzopyranopyrazoles, six-membered ring-fused benzopyrans, and polycyclic benzopyrans are highlighted.
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Affiliation(s)
- Taeho Lee
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, 1370, Sangyuk-dong, Buk-gu, Daegu 702-701, Korea;
| | - Young-Dae Gong
- Center for Innovative Drug Library Research, Department of Chemistry, College of Natural Science, Dongguk University-Seoul, 26 Pildong 3-ga, Jung-gu, Seoul 100-715, Korea
- Author to whom correspondence should be addressed; ; Tel.: +82-2-2260-3206; Fax: +82-2-2268-8204
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Catalysis by molecular iodine: A rapid synthesis of 1,8-dioxo-octahydroxanthenes and their evaluation as potential anticancer agents. Bioorg Med Chem Lett 2012; 22:2186-91. [DOI: 10.1016/j.bmcl.2012.01.126] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2011] [Revised: 01/26/2012] [Accepted: 01/27/2012] [Indexed: 11/21/2022]
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17
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Dyrager C, Möllers LN, Kjäll LK, Alao JP, Dinér P, Wallner FK, Sunnerhagen P, Grøtli M. Design, synthesis, and biological evaluation of chromone-based p38 MAP kinase inhibitors. J Med Chem 2011; 54:7427-31. [PMID: 21905739 DOI: 10.1021/jm200818j] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
3-(4-Fluorophenyl)-2-(4-pyridyl)chromone derivatives were synthesized and evaluated as p38 MAP kinase inhibitors. Introduction of an amino group in the 2-position of the pyridyl moiety gave p38α inhibitors with IC(50) in the low nanomolar range (e.g., IC(50) = 17 nm). The inhibitors showed excellent selectivity profiles when tested on a panel of 62 kinases, as well as efficient inhibition of p38 signaling in human breast cancer cells.
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Affiliation(s)
- Christine Dyrager
- Department of Chemistry, Medicinal Chemistry, University of Gothenburg, SE-41296 Göteborg, Sweden
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18
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Lin BN, Huang SH, Wu WY, Mou CY, Tsai FY. Sonogashira reaction of aryl and heteroaryl halides with terminal alkynes catalyzed by a highly efficient and recyclable nanosized MCM-41 anchored palladium bipyridyl complex. Molecules 2010; 15:9157-73. [PMID: 21150831 PMCID: PMC6259169 DOI: 10.3390/molecules15129157] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Revised: 12/06/2010] [Accepted: 12/09/2010] [Indexed: 11/16/2022] Open
Abstract
A heterogeneous catalyst, nanosized MCM-41-Pd, was used to catalyze the Sonogashira coupling of aryl and heteroaryl halides with terminal alkynes in the presence of CuI and triphenylphosphine. The coupling products were obtained in high yields using low Pd loadings to 0.01 mol%, and the nanosized MCM-41-Pd catalyst was recovered by centrifugation of the reaction solution and re-used in further runs without significant loss of reactivity.
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Affiliation(s)
- Bo-Nan Lin
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan
| | - Shao-Hsien Huang
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan
| | - Wei-Yi Wu
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan
| | - Chung-Yuan Mou
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Fu-Yu Tsai
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan
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Mphahlele MJ. Molecular Iodine-Mediated α-Iodination of Carbonyl Compounds. JOURNAL OF CHEMICAL RESEARCH 2010. [DOI: 10.3184/030823410x12668430854084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The electrophilic properties associated with iodine have been exploited in recent years to effect α-halogenation of carbonyl compounds and their α,β-unsaturated derivatives. In this review, molecular iodine is presented as a readily-available and easy-to-handle reagent to effect α-halogenation of carbonyl compounds in the presence or absence of catalysts.
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Affiliation(s)
- Malose Jack Mphahlele
- Department of Chemistry, College of Science, Engineering and Technology, University of South Africa, PO Box 392, Pretoria 0003, South Africa
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20
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Soberats B, Martínez L, Vega M, Rotger C, Costa A. Conventional Tetrakis(triphenylphosphine)palladium-Copper(I) Iodide-Catalyzed Sonogashira Coupling of Free and BOC- Protected Propargylic Amines “On Water”. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900240] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Mphahlele MJ, Nwamadi MS, Mabeta P. Synthesis and further studies of chemical transformation of the 2-aryl-3-halogenoquinolin-4(1H)-one derivatives. J Heterocycl Chem 2009. [DOI: 10.1002/jhet.5570430203] [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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22
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Huang H, Jiang H, Chen K, Liu H. Efficient Iron/Copper Cocatalyzed Alkynylation of Aryl Iodides with Terminal Alkynes. J Org Chem 2008; 73:9061-4. [DOI: 10.1021/jo801942h] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- He Huang
- Drug Discovery and Design Centre, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, and Graduate School, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Hualiang Jiang
- Drug Discovery and Design Centre, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, and Graduate School, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Kaixian Chen
- Drug Discovery and Design Centre, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, and Graduate School, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Hong Liu
- Drug Discovery and Design Centre, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, and Graduate School, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
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Reddy EA, Barange DK, Islam A, Mukkanti K, Pal M. Synthesis of 2-alkynylquinolines from 2-chloro and 2,4-dichloroquinoline via Pd/C-catalyzed coupling reaction in water. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.097] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Miyake H, Nishino S, Nishimura A, Sasaki M. New Synthesis of 3-Bromoflavones via Bromination of 1-(2-Hydroxyphenyl)-3-arylpropane-1,3-dione by CuBr2, and Conversion into 3-Aminoflavones. CHEM LETT 2007. [DOI: 10.1246/cl.2007.522] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Chinchilla R, Najera C. The Sonogashira Reaction: A Booming Methodology in Synthetic Organic Chemistry. Chem Rev 2007; 107:874-922. [PMID: 17305399 DOI: 10.1021/cr050992x] [Citation(s) in RCA: 2266] [Impact Index Per Article: 133.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafael Chinchilla
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Facultad de Ciencias, Apartado 99, 03080 Alicante, Spain.
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Doucet H, Hierso JC. Palladium-Katalysatorsysteme für die Synthese von konjugierten Eninen durch Sonogashira-Kupplungen und verwandte Alkinylierungen. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200602761] [Citation(s) in RCA: 199] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Doucet H, Hierso JC. Palladium-Based Catalytic Systems for the Synthesis of Conjugated Enynes by Sonogashira Reactions and Related Alkynylations. Angew Chem Int Ed Engl 2007; 46:834-71. [PMID: 17335070 DOI: 10.1002/anie.200602761] [Citation(s) in RCA: 680] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Conjugated alkynes are recurring building blocks in natural products, a wide range of industrial intermediates, pharmaceuticals and agrochemicals, and molecular materials for optics and electronics. The palladium-catalyzed cross-coupling between sp(2)-hybridized carbon atoms of aryl, heteroaryl, and vinyl halides with sp-hybridized carbon atoms of terminal acetylenes is one of the most important developments in the field of alkyne chemistry over the past 50 years. The seminal work of the 1970s has initiated an intense search for more general and reliable reaction conditions. The interest in the catalytic activation of demanding substrates, the need to minimize the consumption of depletive resources, and the search for easy access to an increased variety of functionalized enynes has led to the current generations of high-turnover catalysts. This Review gives an overview of the highly efficient palladium catalyst systems for the direct alkynylation of C(sp(2)) halides with terminal alkynes, both in homogeneous and heterogeneous phases.
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Affiliation(s)
- Henri Doucet
- Institut Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes, Catalyse et Organometalliques, Campus de Beaulieu, 35042 Rennes, France.
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Zhou ZZ, Huang W, Ji FQ, Ding MW, Yang GF. Construction of a combinatorial library of 2-(4-oxo-4H-1-benzopyran-3-yl)-4-thiazolidinones by microwave-assisted one-pot parallel syntheses. HETEROATOM CHEMISTRY 2007. [DOI: 10.1002/hc.20309] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Raju S, Kumar PR, Mukkanti K, Annamalai P, Pal M. Facile synthesis of substituted thiophenes via Pd/C-mediated sonogashira coupling in water. Bioorg Med Chem Lett 2006; 16:6185-9. [PMID: 17011779 DOI: 10.1016/j.bmcl.2006.09.041] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Revised: 08/31/2006] [Accepted: 09/12/2006] [Indexed: 10/24/2022]
Abstract
The first successful Pd/C-mediated Sonogashira coupling of iodothiophene with terminal alkynes in water is described here. Pd/C-CuI-PPh(3) was found to be an efficient catalyst system for this coupling reaction. Using this economic and reliable process a variety of acetylenic thiophenes with a wide range of functional groups were prepared in good yields. Synthetic applications and in vitro anticancer properties of some of the compounds synthesized are described.
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Affiliation(s)
- Sirisilla Raju
- Custom Pharmaceutical Services, Bollaram Road, Miyapur, Hyderabad 500049, India
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30
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Zhou ZZ, Yang GF. Insecticidal lead identification by screening benzopyrano[4,3-c] pyrazol-3(2H)-ones library constructed from multiple-parallel synthesis under microwave irradiation. Bioorg Med Chem 2006; 14:8666-74. [PMID: 16949292 DOI: 10.1016/j.bmc.2006.08.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2006] [Revised: 08/14/2006] [Accepted: 08/15/2006] [Indexed: 11/20/2022]
Abstract
A rapid library-generation via liquid-phase multiple-parallel synthesis of 2-(substituted)benzyl-1-benzopyrano[4,3-c]pyrazol-3(2H)-ones, bearing two points of diversity, under microwave irradiation was successfully performed using chromenone-3-carboxylic acids as starting materials. Compared to an identical library generated by conventional parallel synthesis, microwave-assisted parallel synthesis dramatically decreased reaction times from an average of 16h to 13min, and the yields of products and intermediates were improved in most cases. A bioassay indicated that the compounds of the library exhibited excellent insecticidal activity against T. cinnabarinus at the dosage of 250mgL(-1), and some compounds still exhibited insecticidal activity when the dosage was reduced to 50mgL(-1). This shows that 2-(substituted) benzyl-1-benzopyrano[4,3-c]pyrazol-3(2H)-ones might be used as lead structures for further optimization. To our knowledge, this is the first report about the application of solution-phase multiple-parallel synthesis under microwave irradiation to construct libraries of benzopyrano-[4,3-c]pyrazol-3(2H)-ones with insecticidal activity. The coupling of microwave technology with liquid-phase parallel synthesis constitutes a novel and particularly attractive avenue for the rapid generation of structurally diverse libraries for lead discovery.
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Affiliation(s)
- Zhong-Zheng Zhou
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
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31
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Tandem versus single C–C bond forming reaction under palladium–copper catalysis: regioselective synthesis of α-pyrones fused with thiophene. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.07.095] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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One-pot synthesis of 2-substituted furo[3,2-c]quinolines via tandem coupling–cyclization under Pd/C-copper catalysis. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.08.025] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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33
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34
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Zhou Z, Zhao P, Huang W, Yang G. A Selective Transformation of Flavanones to 3-Bromoflavones and Flavones Under Microwave Irradiation. Adv Synth Catal 2006. [DOI: 10.1002/adsc.200505223] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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Raju S, Batchu VR, Swamy NK, Vasu Dev R, Babu JM, Rajender Kumar P, Mukkanti K, Pal M. Palladium-mediated synthesis of 5-substituted 4-alkynylthieno[2,3-c]pyran-7-ones. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.10.135] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Fitzmaurice RJ, Etheridge ZC, Jumel E, Woolfson DN, Caddick S. Microwave enhanced palladium catalysed coupling reactions: A diversity-oriented synthesis approach to functionalised flavones. Chem Commun (Camb) 2006:4814-6. [PMID: 17345738 DOI: 10.1039/b610734f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microwave enhanced diversity-oriented synthesis (MEDOS) using palladium catalysed protocols is introduced as a powerful new strategy for the synthesis of systematically modified small molecules and is highlighted by application to functionalised flavones.
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Affiliation(s)
- Richard J Fitzmaurice
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20 Gordon Street, London, UK WC1H 0AJ
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37
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Batchu VR, Subramanian V, Parasuraman K, Swamy NK, Kumar S, Pal M. Pd/C-mediated coupling of aryl halides with terminal alkynes in water. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.06.056] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Palladium-catalysed reactions of alcohols. Part D: Rearrangements, carbonylations, carboxylations and miscellaneous reactions. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.06.103] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Nagy TZ, Csámpai A, Kotschy A. Ferrocenyl-palladium complexes in cross-coupling reactions: a comparative study. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.06.072] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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40
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Pal M, Dakarapu R, Parasuraman K, Subramanian V, Yeleswarapu KR. Regio- and Stereospecific Synthesis of Novel 3-Enynyl-Substituted Thioflavones/Flavones Using a Copper-Free Palladium-Catalyzed Reaction†. J Org Chem 2005; 70:7179-87. [PMID: 16122236 DOI: 10.1021/jo050828+] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A variety of 3-enynyl substituted flavones/thioflavones were synthesized via a sequential one-pot procedure using copper-free palladium-catalyzed cross coupling in a simple synthetic operation. The cross coupling between 3-iodo(thio)flavone and a broad range of terminal alkynes was carried out in the presence of Pd(PPh3)2Cl2 and triethylamine to afford the corresponding 3-enynyl derivatives in a regio- and stereoselective fashion. The best results are obtained by employing 3 equiv of the terminal alkynes. The process worked well irrespective of the substituents present on the (thio)flavone ring as well as in the terminal alkynes except arylalkynes. The reaction is quite regioselective, placing the substituent of the terminal alkyne at the far end of the double bond attached with the (thio)flavone ring. The orientation of the (thio)flavonyl and acetylenic moieties across the double bond was found to be syn in the products isolated. A tandem C-C bond-forming reaction in the presence of palladium catalyst rationalized the formation of coupled product. The catalytic process apparently involves heteroarylpalladium formation, regioselective addition to the C-C triple bond of the terminal alkyne, and subsequent displacement of palladium by another mole of alkyne. The present methodology is useful for the introduction of an enynyl moiety at the C-3 position of flavones and thioflavone rings to afford novel compounds of potential biological interest. In the presence of CuI the process afforded 3-alkynyl (thio)flavones in good yields.
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Affiliation(s)
- Manojit Pal
- Chemistry-Discovery Research, Dr. Reddy's Laboratories Ltd., Bollaram Road, Miyapur, Hyderabad 500049, India.
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41
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Gil-Moltó J, Nájera C. Palladium(II
) Chloride and a (Dipyridin-2-ylmethyl)amine-Derived Palladium(II
) Chloride Complex as Highly Efficient Catalysts for the Synthesis of Alkynes in Water or in NMP and of Diynes in the Absence of Reoxidant. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500319] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Pal M, Parasuraman K, Subramanian V, Dakarapu R, Yeleswarapu KR. Palladium mediated stereospecific synthesis of 3-enynyl substituted thioflavones/flavones. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.01.113] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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43
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