1
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Chilaka SK, Chellu RK, Soda AK, Kurva S, Nanubolu JB, Madabhushi S. Base‐Catalyzed Domino Reaction Between Aldoxime and <i>N</i>‐Chlorosuccinimide in Alcohol: One‐Pot Synthesis of Alkyl 3‐(3‐Aryl‐1,2,4‐oxadiazol‐5‐yl)propanoates. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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2
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Facile Synthesis of Tricyclic 1,2,4-Oxadiazolines-Fused Tetrahydro-Isoquinolines from Oxime Chlorides with 3,4-Dihydroisoquinoline Imines. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103064. [PMID: 35630538 PMCID: PMC9145198 DOI: 10.3390/molecules27103064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 05/05/2022] [Accepted: 05/09/2022] [Indexed: 11/25/2022]
Abstract
A mild and efficient strategy for the synthesis of tricyclic 1,2,4-oxadiazolines-fused tetrahydro-isoquinolines derivatives via [3 + 2] cycloaddition reaction is reported. The reactions provided the functionalized tricyclic 1,2,4-oxadiazolines in high yields (up to 96%). This protocol is simple and easy to handle. Moreover, a gram-scale experiment further highlights the synthetic utility. The chemical structure of the product was determined by X-ray single-crystal structure analysis. A possible mechanism for this transformation is proposed to explain the reaction process.
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3
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Hossain MI, Khan MIH, Kim SJ, Le HV. Synthesis of 3,4,5-trisubstituted isoxazoles in water via a [3 + 2]-cycloaddition of nitrile oxides and 1,3-diketones, β-ketoesters, or β-ketoamides. Beilstein J Org Chem 2022; 18:446-458. [PMID: 35529890 PMCID: PMC9039522 DOI: 10.3762/bjoc.18.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 04/08/2022] [Indexed: 11/23/2022] Open
Abstract
Herein we report a method for the synthesis of 3,4,5-trisubstituted isoxazoles in water under mild basic conditions at room temperature via a [3 + 2]-cycloaddition of nitrile oxides and 1,3-diketones, β-ketoesters, or β-ketoamides. We optimized the reaction conditions to control the selectivity of the production of isoxazoles and circumvent other competing reactions, such as O-imidoylation or hetero [3 + 2]-cycloaddition. The reaction happens fast in water and completes within 1–2 hours, which provides an environmentally friendly access to 3,4,5-trisubstituted isoxazoles, an important class of structures found in numerous bioactive natural products and pharmaceuticals. Additionally, we optimized the reaction conditions to produce trifluoromethyl-substituted isoxazoles, a prevalent scaffold in biomedical research and drug discovery programs. We also proposed a plausible mechanism for the selectivity of the [3 + 2]-cycloaddition reaction to produce 3,4,5-trisubstituted isoxazoles. Not to be overlooked are our optimized reaction conditions for the dimerization of hydroximoyl chlorides to form furoxans also known as 1,2,5-oxadiazole 2-oxides, a class of structures with important biological activities due to their unique electronic nature and coordination ability.
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Affiliation(s)
- Md Imran Hossain
- Department of BioMolecular Sciences and Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Md Imdadul H Khan
- Department of BioMolecular Sciences and Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Seong Jong Kim
- Natural Products Utilization Research Unit, United States Department of Agriculture, Agricultural Research Service, University of Mississippi, Mississippi 38677, USA
| | - Hoang V Le
- Department of BioMolecular Sciences and Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
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4
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von Drathen T, Ure EM, Kirschner S, Roth A, Meier L, Woolhouse AD, Cameron SA, Knippschild U, Peifer C, Luxenburger A. C5-Iminosugar modification of casein kinase 1δ lead 3-(4-fluorophenyl)-5-isopropyl-4-(pyridin-4-yl)isoxazole promotes enhanced inhibitor affinity and selectivity. Arch Pharm (Weinheim) 2022; 355:e2100497. [PMID: 35174898 DOI: 10.1002/ardp.202100497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 11/11/2022]
Abstract
The quest for isoform-selective and specific ATP-competitive protein kinase inhibitors is of great interest, as inhibitors with these qualities will come with reduced toxicity and improved efficacy. However, creating such inhibitors is very challenging due to the high molecular similarity of kinases ATP active sites. To achieve selectivity for our casein kinase (CK) 1 inhibitor series, we elected to endow our previous CK1δ-hit, 3-(4-fluorophenyl)-5-isopropyl-4-(pyridin-4-yl)isoxazole (1), with chiral iminosugar scaffolds. These scaffolds were attached to C5 of the isoxazole ring, a position deemed favorable to facilitate binding interactions with the ribose pocket/solvent-open area of the ATP binding pocket of CK1δ. Here, we describe the synthesis of analogs of 1 ((-)-/(+)-34, (-)-/(+)-48), which were prepared in 13 steps from enantiomerically pure ethyl (3R,4S)- and ethyl (3S,4R)-1-benzyl-4-[(tert-butyldimethylsilyl)oxy]-5-oxopyrrolidine-3-carboxylate ((-)-11 and (+)-11), respectively. The synthesis involved the coupling of Weinreb amide-activated chiral pyrrolidine scaffolds with 4- and 2-fluoro-4-picoline and reaction of the resulting 4-picolyl ketone intermediates ((-)-/(+)-40 and (-)-/(+)-44) with 4-fluoro-N-hydroxybenzenecarboximidoyl chloride to form the desired isoxazole ring. The activity of the compounds against human CK1δ, -ε, and -α was assessed in recently optimized in vitro assays. Compound (-)-34 was the most active compound with IC50 values (CK1δ/ε) of 1/8 µM and displayed enhanced selectivity toward CK1δ.
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Affiliation(s)
- Thorsten von Drathen
- Ferrier Research Institute, Victoria University of Wellington, Lower Hutt, New Zealand.,Institute of Pharmacy, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Elizabeth M Ure
- Ferrier Research Institute, Victoria University of Wellington, Lower Hutt, New Zealand
| | - Stefan Kirschner
- Institute of Pharmacy, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Aileen Roth
- Department of General and Visceral Surgery, Ulm University Hospital, Ulm, Germany
| | - Laura Meier
- Department of General and Visceral Surgery, Ulm University Hospital, Ulm, Germany
| | - Anthony D Woolhouse
- Ferrier Research Institute, Victoria University of Wellington, Lower Hutt, New Zealand
| | - Scott A Cameron
- Ferrier Research Institute, Victoria University of Wellington, Lower Hutt, New Zealand
| | - Uwe Knippschild
- Department of General and Visceral Surgery, Ulm University Hospital, Ulm, Germany
| | - Christian Peifer
- Institute of Pharmacy, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Andreas Luxenburger
- Ferrier Research Institute, Victoria University of Wellington, Lower Hutt, New Zealand
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5
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Hawash M, Jaradat N, Bawwab N, Salem K, Arafat H, Hajyousef Y, Shtayeh T, Sobuh S. Design, synthesis, and biological evaluation of phenyl-isoxazole-carboxamide derivatives as anticancer agents. HETEROCYCL COMMUN 2021. [DOI: 10.1515/hc-2020-0134] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Abstract
The present study aimed to design and synthesize a series of phenyl-isoxazole-carboxamide derivatives and investigate their antitumor and antioxidant activities. The in vitro cytotoxic evaluation was conducted using the MTS assay against four cancer cell lines: hepatocellular carcinoma (Hep3B and HepG2), cervical adenocarcinoma (HeLa), breast carcinoma (MCF-7), in addition to the normal cell line (Hek293T). Besides, the antioxidant activity was evaluated using a 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. All obtained compounds were found to have potent to moderate activities against Hep3B and MCF-7 cancer cells lines, except compound 2e. It was found that compound 2a has potent activity against HeLa and Hep3B cancer cell lines with IC50 values of 0.91 and 8.02 µM, respectively. The IC50 dose range of the tested compounds against Hep3B was 5.96–28.62 µM, except for 2e, compared with doxorubicin, which has an IC50 value of 2.23 µM. Also, the IC50 value range of the compounds against Hek293T was 112.78–266.66 µM, compared with doxorubicin, which has an IC50 dose of 0.581 µM. The antioxidant activity of the synthesized compounds was weak, and compound 2d showed moderate activity against the DPPH enzyme with an IC50 value of 138.50 µM in comparison with Trolox, which has an IC50 dose of 37.23 µM.
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Affiliation(s)
- Mohammed Hawash
- Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus P.O. Box 7, 00970 , Palestine
| | - Nidal Jaradat
- Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus P.O. Box 7, 00970 , Palestine
| | - Noor Bawwab
- Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus P.O. Box 7, 00970 , Palestine
| | - Kamilah Salem
- Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus P.O. Box 7, 00970 , Palestine
| | - Hadeel Arafat
- Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus P.O. Box 7, 00970 , Palestine
| | - Yousef Hajyousef
- Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus P.O. Box 7, 00970 , Palestine
- Department of Pharmacy, Faculty of Pharmacy, Cyprus International University , Lefkosa, TRNC, Via Mersin 10, 99258 , Turkey
| | - Tahrir Shtayeh
- Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus P.O. Box 7, 00970 , Palestine
| | - Shorooq Sobuh
- Department of Biomedical Sciences, Physiology, Pharmacology & Toxicology Division, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus , Palestine
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6
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Wang KK, Li YL, Zhao YC, Zhang SS, Chen R, Sun A. Facile synthesis of O-acylhydroxamates via reaction of oxime chlorides with carboxylic acids. RSC Adv 2021; 11:40193-40196. [PMID: 35494140 PMCID: PMC9044751 DOI: 10.1039/d1ra06860a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 12/03/2021] [Indexed: 12/16/2022] Open
Abstract
A simple and efficient method for the synthesis of O-acylhydroxamate derivatives from oxime chlorides and carboxylic acids was developed. The reaction affords clean and facile access to diverse O-acylhydroxamates in high yields (up to 85%). The chemical structure of a typical product was confirmed using single-crystal X-ray structure analysis. A simple and practical method for synthesizing a broad range of functionalized O-acylhydroxamates in high yields from oxime chlorides and carboxylic acids has been achieved.![]()
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Affiliation(s)
- Kai-Kai Wang
- School of Pharmacy, Xinxiang University Xinxiang 453000 P. R. China +86-373-3682674.,Key Laboratory of Nano-carbon Modified Film Technology Engineering of Henan Province Xinxiang 453000 P. R. China
| | - Yan-Li Li
- Medical College, Xinxiang University Xinxiang 453000 P. R. China
| | - Ying-Chao Zhao
- School of Pharmacy, Xinxiang University Xinxiang 453000 P. R. China +86-373-3682674
| | - Shan-Shan Zhang
- School of Pharmacy, Xinxiang University Xinxiang 453000 P. R. China +86-373-3682674
| | - Rongxiang Chen
- School of Pharmacy, Xinxiang University Xinxiang 453000 P. R. China +86-373-3682674
| | - Aili Sun
- School of Pharmacy, Xinxiang University Xinxiang 453000 P. R. China +86-373-3682674.,Key Laboratory of Nano-carbon Modified Film Technology Engineering of Henan Province Xinxiang 453000 P. R. China
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7
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Cheremnykh KP, Savelyev VA, Shults EE. An Efficient Access to 3,5‐Disubstituted Isoxazoles with Anthranilate Ester Moiety: Alkaloid Lappaconitine – Aryl Conjugates with an Isoxazole Linker. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kirill P. Cheremnykh
- Laboratory of Medicinal Chemistry Novosibirsk institute of Organic Chemistry Lavrentyev Ave 9 630090 Novosibirsk Russian Federation
| | - Victor A. Savelyev
- Laboratory of Medicinal Chemistry Novosibirsk institute of Organic Chemistry Lavrentyev Ave 9 630090 Novosibirsk Russian Federation
| | - Elvira E. Shults
- Laboratory of Medicinal Chemistry Novosibirsk institute of Organic Chemistry Lavrentyev Ave 9 630090 Novosibirsk Russian Federation
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8
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Vasilenko DA, Dronov SE, Parfiryeu DU, Sadovnikov KS, Sedenkova KN, Grishin YK, Rybakov VB, Kuznetsova TS, Averina EB. 5-Nitroisoxazoles in S NAr reactions: access to polysubstituted isoxazole derivatives. Org Biomol Chem 2021; 19:6447-6454. [PMID: 34236067 DOI: 10.1039/d1ob00816a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient protocol for the straightforward functionalization of the isoxazole ring via the reactions of aromatic nucleophilic substitution of the nitro group with various nucleophiles has been elaborated. The method features excellent chemical yields, easy operability of the reaction, mild reaction conditions and a broad scope of both 5-nitroisoxazoles and nucleophiles. A synthetic approach to 3,5- and 3,4,5-substituted isoxazoles via the sequential functionalization of the isoxazole ring has been developed based on the excellent regioselectivity of the reaction of 3,5-dinitroisoxazoles with nucleophiles.
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Affiliation(s)
- Dmitry A Vasilenko
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia
| | - Sevastian E Dronov
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia
| | - Dzianis U Parfiryeu
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia
| | - Kirill S Sadovnikov
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia
| | - Kseniya N Sedenkova
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia and IPhaC RAS, Severnyi Proezd, 1, Chernogolovka, Moscow Region 142432, Russia.
| | - Yuri K Grishin
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia
| | - Victor B Rybakov
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia
| | - Tamara S Kuznetsova
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia
| | - Elena B Averina
- Lomonosov Moscow State University, Department of Chemistry, Leninskie Gory, 1-3, Moscow 119991, Russia and IPhaC RAS, Severnyi Proezd, 1, Chernogolovka, Moscow Region 142432, Russia.
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9
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Abstract
In this review article, we describe the application, reactivity and synthesis of isoxazole derivatives,
more specifically, the application, reactivity, and synthesis of 3,5-disubstituted, 3,4-
disubstituted, and 3,4,5-trisubstituted isoxazole using the green method. We review the application of
isoxazole in material science, agriculture and pharmaceutical. In material science, isoxazole is used
as a photochromic, electrochemical probe for Cu<sup>2+</sup> and, given its optical properties, in dye-sensitized
solar cells, high energy material and liquid crystal. In agriculture, isoxazole is used as an insecticide
for managing Callosobruchus chinensis, Acaricidal activity against T. cinnabarinus, and herbicidal
activities of 2-cyanoacrylates containing isoxazole. In pharmaceutical, isoxazole shows anticancer,
antituberculosis, anti-inflammatory, and acetylcholinesterase inhibitors. Further, we describe various
reactions of isoxazole such as ring opens, bromination and iodination, thioynol ethers, intramolecular
SEAr reaction, arylation, cycloaddition and photocycloaddition, photoisomerization, Domino transformation
of isoxazoles to 2,4-dicarbonyl pyrroles and rearrangement. We also describe the synthesis
of 3,5-disubstituted, 3,4-disubstituted and 3,4,5-trisubstituted isoxazole using different methods.
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Affiliation(s)
- Yogesh Walunj
- Department of Chemistry, Sir Parshurambhau College, Tilak Road, Pune, India
| | - Pravin Mhaske
- Department of Chemistry, Sir Parshurambhau College, Tilak Road, Pune, India
| | - Pramod Kulkarni
- Post Graduate Center in Organic Chemistry and Department of Chemistry, Hutatma Rajguru Mahavidyalaya, Rajgurunagar, Pune-410505, India
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10
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Antony P M, Balaji GL, Iniyavan P, Ila H. Reaction of 1,3-Bis(het)arylmonothio-1,3-diketones with Sodium Azide: Regioselective Synthesis of 3,5-Bis(het)arylisoxazoles via Intramolecular N–O Bond Formation. J Org Chem 2020; 85:15422-15436. [DOI: 10.1021/acs.joc.0c02216] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Mary Antony P
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Gantala L. Balaji
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Pethaperumal Iniyavan
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Hiriyakkanavar Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
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11
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Facile synthesis of tricyclic isoxazole-fused benzo[b]thiophene 1,1-dioxide derivatives via 1,3-dipolar cycloaddition. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151943] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Nakano R, Togo H. Efficient transformation of electron-rich arenes into diethyl 3-arylisoxazole-4,5-dicarboxylates. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Tripathi A, Rode CV, Llop J, Chavan SP, Joshi SM. An enolate-mediated regioselective synthesis of 1,2,3-triazoles via azide-aldehydes or ketones [3+2]-cycloaddition reactions in aqueous phase. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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14
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Li J, Lin Z, Wu W, Jiang H. Recent advances in metal catalyzed or mediated cyclization/functionalization of alkynes to construct isoxazoles. Org Chem Front 2020. [DOI: 10.1039/d0qo00609b] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarized the recent developments in metal catalyzed or mediated cyclization/functionalization of alkynes to construct isoxazoles.
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Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Zidong Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
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15
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Shang X, Liu K, Zhang Z, Xu X, Li P, Li W. Direct access to spirobiisoxazoline via the double 1,3-dipolar cycloaddition of nitrile oxide with allenoate. Org Biomol Chem 2019; 16:895-898. [PMID: 29345711 DOI: 10.1039/c7ob03040a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The double [3 + 2]-cycloadditions between nitrile oxides and allenoates have been achieved. In the presence of DABCO combined with Et3N, 2-substituted buta-2,3-dienoates reacted with oxime chlorides to afford spirobiisoxazolines in 55-90% yields via the double 1,3-dipolar cycloaddition. Notably, the construction of double isoxazoline moieties and two chiral centers including a spiro carbon center was achieved.
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Affiliation(s)
- Xinye Shang
- Department of Medicinal Chemistry, School of Pharmacy, Qingdao University, Qingdao, Shandong 266021, China.
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16
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Facile, capable, atom-economical one-pot multicomponent strategy for the direct regioselective synthesis of novel isoxazolo[5,4-d]pyrimidines. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03757-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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17
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18
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Gujral J, Reddy TP, Gorachand B, Ramachary DB. An Aldehyde‐Azomethine Imine [3+2]‐Cycloaddition: High‐Yielding Regioselective Synthesis of Substituted
N,N
‐Bicyclic Pyrazolidinones. ChemistrySelect 2018. [DOI: 10.1002/slct.201801328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jagjeet Gujral
- Catalysis LaboratorySchool of ChemistryUniversity of Hyderabad Hyderabad-500 046 India
| | - T. Prabhakar Reddy
- Catalysis LaboratorySchool of ChemistryUniversity of Hyderabad Hyderabad-500 046 India
| | - B. Gorachand
- Catalysis LaboratorySchool of ChemistryUniversity of Hyderabad Hyderabad-500 046 India
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19
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Imai T, Togo H. One-Pot Preparation of 3-Arylisoxazole-4,5-dicarboxylates from Benzylic Chlorides and Acetylenedicarboxylates. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701726] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Taro Imai
- Graduate School of Science; Chiba University; Yayoi-cho 1-33, Inage-ku 263-8522 Chiba Japan
| | - Hideo Togo
- Graduate School of Science; Chiba University; Yayoi-cho 1-33, Inage-ku 263-8522 Chiba Japan
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20
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Morita T, Yugandar S, Fuse S, Nakamura H. Recent progresses in the synthesis of functionalized isoxazoles. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.020] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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21
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Liu K, Shang X, Cheng Y, Chang X, Li P, Li W. Regioselective [3 + 2]-annulation of hydrazonyl chlorides with 1,3-dicarbonyl compounds for assembling of polysubstituted pyrazoles. Org Biomol Chem 2018; 16:7811-7814. [DOI: 10.1039/c8ob02352b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The facile approach to polysubstituted pyrazoles from hydrazonyl chlorides and 1,3-dicarbonyl compounds has been developed. Hydrazonyl chlorides reacted with N-phenyl-3-oxobutanamides smoothly to afford a series of polysubstituted pyrazoles in 67–98% yields via the [3 + 2]-cycloaddition.
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Affiliation(s)
- Kun Liu
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Xinye Shang
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Yuyu Cheng
- Department of Chemistry and Shenzhen Grubbs Institute
- Southern University of Science and Technology
- Shenzhen
- China
| | - Xiaoyong Chang
- Department of Chemistry and Shenzhen Grubbs Institute
- Southern University of Science and Technology
- Shenzhen
- China
| | - Pengfei Li
- Department of Chemistry and Shenzhen Grubbs Institute
- Southern University of Science and Technology
- Shenzhen
- China
| | - Wenjun Li
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
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22
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Bartlett SL, Sohtome Y, Hashizume D, White PS, Sawamura M, Johnson JS, Sodeoka M. Catalytic Enantioselective [3 + 2] Cycloaddition of α-Keto Ester Enolates and Nitrile Oxides. J Am Chem Soc 2017; 139:8661-8666. [PMID: 28581747 DOI: 10.1021/jacs.7b03782] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An enantioselective [3 + 2] cycloaddition reaction between nitrile oxides and transiently generated enolates of α-keto esters has been developed. The catalyst system was found to be compatible with in situ nitrile oxide-generation conditions. A versatile array of nitrile oxides and α-keto esters could participate in the cycloaddition, providing novel 5-hydroxy-2-isoxazolines in high chemical yield with high levels of diastereo- and enantioselectivity. Notably, the optimal reaction conditions circumvented concurrent reactions via O-imidoylation and hetero-[3 + 2] pathways.
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Affiliation(s)
- Samuel L Bartlett
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | | | | | - Peter S White
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | | | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
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23
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Sangwan R, Javed, Dubey A, Mandal PK. Organocatalytic [3+2] Cycloadditions: Toward Facile Synthesis of Sulfonyl-1,2,3-Triazolyl and Fully Substituted 1,2,3-Triazolyl Glycoconjugates. ChemistrySelect 2017. [DOI: 10.1002/slct.201700805] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Rekha Sangwan
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension; Sitapur Road, P.O. Box 173 Lucknow 226 031 India
| | - Javed
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension; Sitapur Road, P.O. Box 173 Lucknow 226 031 India
| | - Atul Dubey
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension; Sitapur Road, P.O. Box 173 Lucknow 226 031 India
| | - Pintu K. Mandal
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension; Sitapur Road, P.O. Box 173 Lucknow 226 031 India
- Academy of Scientific and Innovative Research; New Delhi- 11000 India
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24
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Yuan H, Zhang L, Liu Z, Liu Y, Wang J, Li W. A NHC-catalyzed 1,3-dipolar cycloaddition reaction of allyl ketones with azides: direct access to 1,4,5-trisubstituted 1,2,3-triazoles. Org Biomol Chem 2017; 15:4286-4290. [DOI: 10.1039/c7ob00906b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A NHC-catalyzed 1,3-dipolar cycloaddition reaction of allyl ketones with azides has been developed. This strategy could generate 1,4,5-trisubstituted 1,2,3-triazoles in high yields and regioselectivities in the presence of a 20 mol% N-heterocyclic carbene catalyst. A broad substrate scope of this process is also presented.
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Affiliation(s)
- Huijun Yuan
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Lili Zhang
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Zhantao Liu
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Yang Liu
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Jian Wang
- School of Chemical & Environmental Engineering
- Wuyi University
- Jiangmen
- China
- School of Pharmaceutical Sciences
| | - Wenjun Li
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
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25
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Yuan H, Gao H, Liu K, Liu Z, Wang J, Li W. Cycloadduct formation of α,β-unsaturated esters with azides catalyzed by NHC systems. Org Biomol Chem 2017; 15:9066-9070. [DOI: 10.1039/c7ob02469j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
NHC-catalyzed cycloadduct formation of α,β-unsaturated esters with azides has been developed. This strategy could generate 1,2,3-triazoles and dihydropyrazoles with high yields and regioselectivities. The broad substrate scope and mechanistic survey of this process are also presented.
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Affiliation(s)
- Huijun Yuan
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Hua Gao
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Kun Liu
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Zhantao Liu
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Jian Wang
- School of Chemical & Environmental Engineering
- Wuyi University
- Jiangmen
- China
- School of Pharmaceutical Sciences
| | - Wenjun Li
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
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26
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Feng YS, Shu YJ, Cao P, Xu T, Xu HJ. Copper(i)-catalyzed ring-opening cyanation of cyclopropanols. Org Biomol Chem 2017; 15:3590-3593. [DOI: 10.1039/c7ob00627f] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A copper(i)-catalyzed ring-opening cyanation of cyclopropanols is developed. The reaction provides an efficient protocol to synthesize β-cyano ketones.
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Affiliation(s)
- Yi-Si Feng
- School of Chemistry and Chemical Engineering
- School of Biological and Medical Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Yong-Jin Shu
- School of Chemistry and Chemical Engineering
- School of Biological and Medical Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Ping Cao
- School of Chemistry and Chemical Engineering
- School of Biological and Medical Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Tao Xu
- School of Chemistry and Chemical Engineering
- School of Biological and Medical Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
| | - Hua-Jian Xu
- School of Chemistry and Chemical Engineering
- School of Biological and Medical Engineering
- Hefei University of Technology
- Hefei 230009
- P. R. China
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27
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Ramachary DB, Gujral J, Peraka S, Reddy GS. Triazabicyclodecene as an Organocatalyst for the Regiospecific Synthesis of 1,4,5-TrisubstitutedN-Vinyl-1,2,3-triazoles. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601497] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Jagjeet Gujral
- Catalysis Laboratory, School of Chemistry; University of Hyderabad; 500046 Hyderabad India
| | - Swamy Peraka
- Catalysis Laboratory, School of Chemistry; University of Hyderabad; 500046 Hyderabad India
| | - G. Surendra Reddy
- Catalysis Laboratory, School of Chemistry; University of Hyderabad; 500046 Hyderabad India
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28
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Ramachary DB, Reddy GS, Peraka S, Gujral J. Organocatalytic Vinyl Azide-Carbonyl [3+2] Cycloaddition: High-Yielding Synthesis of Fully DecoratedN-Vinyl-1,2,3-Triazoles. ChemCatChem 2016. [DOI: 10.1002/cctc.201601317] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - G. Surendra Reddy
- Catalysis Laboratory; School of Chemistry; University of Hyderabad; Hyderabad 500 046 India
| | - Swamy Peraka
- Catalysis Laboratory; School of Chemistry; University of Hyderabad; Hyderabad 500 046 India
| | - Jagjeet Gujral
- Catalysis Laboratory; School of Chemistry; University of Hyderabad; Hyderabad 500 046 India
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29
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Li W, Zhou X, Shi Z, Liu Y, Liu Z, Gao H. Enolate-mediated 1,3-dipolar cycloaddition reactions of allyl ketones with nitrile oxides: direct access to 3,5-disubstituted isoxazolines. Org Biomol Chem 2016; 14:9985-9988. [DOI: 10.1039/c6ob02025a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
TMG-catalyzed [3 + 2] organocatalytic 1,3-dipolar cycloaddition reactions of allyl ketones with in situ generated nitrile oxides have been developed. This strategy could generate 3,5-disubstituted isoxazolines in high yields and regioselectivities.
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Affiliation(s)
- Wenjun Li
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Xiao Zhou
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Zhenyan Shi
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Yang Liu
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Zhantao Liu
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Hua Gao
- School of Pharmacy
- Qingdao University
- Qingdao
- China
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