1
|
Xu W, Li X, Zou L, Li X, Zhang Z, Ali S, Wang Z, Li P, Zheng H. Access to Fully Substituted Dihydroindazoles Via Hexadehydro-Diels-Alder/[3 + 2] Cycloaddition. J Org Chem 2023; 88:14736-14747. [PMID: 37819716 DOI: 10.1021/acs.joc.3c01901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
A cascade hexadehydro-Diels-Alder (HDDA)/[3 + 2] cycloaddition reaction between tetrayne and N,N'-cyclic acylhydrazone is described. This strategy allows the efficient construction of fully substituted 2,3-dihydro-1H-indazole scaffolds which have insecticidal activity against the third instar larvae of Mythimna separata.
Collapse
Affiliation(s)
- Weigang Xu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Xiuhuan Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Luyao Zou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Xiaoli Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Zhiqiang Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Sajjad Ali
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Zhengshen Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Pengfei Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Huaiji Zheng
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| |
Collapse
|
2
|
Edilova YO, Osipova EA, Slepukhin PA, Saloutin VI, Bazhin DN. Exploring Three Avenues: Chemo- and Regioselective Transformations of 1,2,4-Triketone Analogs into Pyrazoles and Pyridazinones. Int J Mol Sci 2023; 24:14234. [PMID: 37762539 PMCID: PMC10531707 DOI: 10.3390/ijms241814234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/14/2023] [Accepted: 09/16/2023] [Indexed: 09/29/2023] Open
Abstract
A convenient approach to substituted pyrazoles and pyridazinones based on 1,2,4-triketones is presented. Chemo- and regiocontrol in condensations of t-Bu, Ph-, 2-thienyl-, and CO2Et-substituted 1,2,4-triketone analogs with hydrazines are described. The direction of preferential nucleophilic attack was shown to be switched depending on the substituent nature in triketone as well as the reaction conditions. The acid and temperature effects on the selectivity of condensations were revealed. Regiochemistry of heterocyclic core formation was confirmed by NMR and XRD studies. The facile construction of heterocyclic motifs bearing acetyl and (or) carbethoxy groups suggests them as promising mono- or bifunctional building blocks for subsequent transformations.
Collapse
Affiliation(s)
- Yulia O. Edilova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
| | - Ekaterina A. Osipova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
- Department of Organic and Biomolecular Chemistry, Ural Federal University Named after the First President of Russia B.N. Eltsin, 620002 Yekaterinburg, Russia
| | - Pavel A. Slepukhin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
| | - Victor I. Saloutin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
| | - Denis N. Bazhin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
- Department of Organic and Biomolecular Chemistry, Ural Federal University Named after the First President of Russia B.N. Eltsin, 620002 Yekaterinburg, Russia
| |
Collapse
|
3
|
Zhao T, Sun Y, Meng Y, Liu L, Dai J, Yan G, Pan X, Guan X, Song L, Lin R. Design, Synthesis and Antifungal Activities of Novel Pyrazole Analogues Containing the Aryl Trifluoromethoxy Group. Molecules 2023; 28:6279. [PMID: 37687108 PMCID: PMC10488855 DOI: 10.3390/molecules28176279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 08/18/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
On the basis of the three-component synthetic methodology developed by us, a total of twenty-six pyrazole compounds bearing aryl OCF3 were designed and synthesized. Their chemical structures were characterized by 1H and 13C nuclear magnetic resonance and high-resolution mass spectrometry. These compounds were evaluated systematically for antifungal activities in vitro against six plant pathogenic fungi by the mycelium growth rate method. Most of the compounds showed some activity against each of the fungi at 100 μg/mL. Compounds 1t and 1v exhibited higher activity against all the tested fungi, and 1v displayed the highest activity against F. graminearum with an EC50 value of 0.0530 μM, which was comparable with commercial pyraclostrobin. Structure-activity relationship analysis showed that, with respect to the R1 substituent, the straight chain or cycloalkyl ring moiety was a key structural moiety for the activity, and the R2 substituent on the pyrazole ring could have significant effects on the activity. Simple and readily available pyrazoles with potent antifungal activity were obtained, which are ready for further elaboration to serve as a pharmacophore in new potential antifungal agents.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Liyan Song
- Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China (G.Y.); (X.P.); (X.G.)
| | - Ran Lin
- Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China (G.Y.); (X.P.); (X.G.)
| |
Collapse
|
4
|
Li JL, Yang JF, Zhou LM, Cai M, Huang ZQ, Liu XL, Zhu XL, Yang GF. Design and Synthesis of Novel Oxathiapiprolin Derivatives as Oxysterol Binding Protein Inhibitors and Their Application in Phytopathogenic Oomycetes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37286337 DOI: 10.1021/acs.jafc.3c00990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Oomycetes, particularly those from the genus Phytophthora, are significant threats to global food security and natural ecosystems. Oxathiapiprolin (OXA) is an effective oomycete fungicide that targets an oxysterol binding protein (OSBP), while the binding mechanism of OXA is still unclear, which limits the pesticide design, induced by the low sequence identity of Phytophthora and template models. Herein, we generated the OSBP model of the well-reported Phytophthora capsici using AlphaFold 2 and studied the binding mechanism of OXA. Based on it, a series of OXA analogues were designed. Then, compound 2l, the most potent candidate, was successfully designed and synthesized, showing a control efficiency comparable to that of OXA. Moreover, field trial experiments showed that 2l exhibited nearly the same activity (72.4%) as OXA against cucumber downy mildew at 25 g/ha. The present work indicated that 2l could be used as a leading compound for the discovery of new OSBP fungicides.
Collapse
Affiliation(s)
- Jian-Long Li
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Jing-Fang Yang
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Li-Ming Zhou
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Meng Cai
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Zhong-Qiao Huang
- Department of Plant Pathology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Xi-Li Liu
- Department of Plant Pathology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Xiao-Lei Zhu
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Guang-Fu Yang
- National Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, People's Republic of China
| |
Collapse
|
5
|
Mattison RL, Beffa R, Bojack G, Bollenbach-Wahl B, Dörnbrack C, Dorn N, Freigang J, Gatzweiler E, Getachew R, Hartfiel C, Heinemann I, Helmke H, Hohmann S, Jakobi H, Lange G, Lümmen P, Willms L, Frackenpohl J. Design, synthesis and screening of herbicidal activity for new phenyl pyrazole-based protoporphyrinogen oxidase-inhibitors (PPO) overcoming resistance issues. PEST MANAGEMENT SCIENCE 2023; 79:2264-2280. [PMID: 36815643 DOI: 10.1002/ps.7425] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/19/2022] [Accepted: 02/23/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND Whilst there are several methods to control weeds, which continuously plague farmers around the globe, the application of small molecular compounds is still the most effective technology to date. Plants can evolve to become resistant to PPO-inhibitors, a class of herbicides in commercial use since the 1960s. It is therefore essential to continuously develop new herbicides based on this mode-of-action with enhanced intrinsic activity, an improved resistance profile and favourable physicochemical properties. Based on an Amaranthus PPO crystal structure and subsequent modelling studies, halogen-substituted pyrazoles have been investigated as isosteres of uracil-based PPO-inhibitors. RESULTS By combining structural features from the commercial PPO-inhibitors tiafenacil and pyraflufen-ethyl and by investigating receptor-binding properties, we identified new promising pyrazole-based lead structures showing strong activity in vitro and in vivo against economically important weeds of the Amaranthus genus: A. retroflexus, and resistant A. palmeri and A. tuberculatus. CONCLUSION The present work covers a series of novel PPO-inhibiting compounds that contain a pyrazole ring and a substituted thioacetic acid sidechain attached to the core phenyl group. These compounds show good receptor fit in line with excellent herbicidal activity against weeds that plague corn and rice crops with low application rates. This, in combination with promising selectivity in corn, have the potential to mitigate and affect weeds that have become resistant to some of the current market standards. Remarkably, some of the novel PPO-inhibitors outlined herein show efficacies against economically important weeds that were superior to recently commercialized and structurally related tiafenacil. © 2023 Society of Chemical Industry.
Collapse
Affiliation(s)
- Rebecca L Mattison
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Roland Beffa
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Guido Bojack
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Birgit Bollenbach-Wahl
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Christine Dörnbrack
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Nicole Dorn
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Jörg Freigang
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Elmar Gatzweiler
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Rahel Getachew
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Claudia Hartfiel
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Ines Heinemann
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Hendrik Helmke
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Sabine Hohmann
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Harald Jakobi
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Gudrun Lange
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Peter Lümmen
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Lothar Willms
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Jens Frackenpohl
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| |
Collapse
|
6
|
Prakash M, Halder S, Guin S, Samanta S. Swapping Copper-Catalytic Process: Selective Access to Pyrazoles and Conjugated Ketimines from Oxime Acetates and Cyclic Sulfamidate Imines. Chem Asian J 2023; 18:e202201114. [PMID: 36583485 DOI: 10.1002/asia.202201114] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/16/2022] [Accepted: 12/29/2022] [Indexed: 12/31/2022]
Abstract
A powerful CuCl-catalyzed sequential one-pot reaction of aryl methyl ketoxime acetates with cyclic N-sulfonyl imines followed by elimination in the presence of base is reported. This hydrazine-free method conveniently makes C-C and N-N bonds via a radical cleavage of the N-O bond, delivering a special class of C3-hydroxyarylated pyrazoles in good yields. Surprisingly, while employing CuI as a catalyst instead of CuCl, the reaction proceeds through a non-radical pathway which embodies a new tactic for the high-yielding access to value-added conjugated N-unsubstituted ketimines. Moreover, additive-free approach to sulfamidate-fused-pyrazoles was achieved by successfully catalyzing addition and oxidative N-N bond-making reactions by CuI and CuCl, respectively. Significantly, our novel technique could convert the prepared ketimines into the pharmacologically recognized 6H-benzo[c]chromene frameworks.
Collapse
Affiliation(s)
- Meher Prakash
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Sajal Halder
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Soumitra Guin
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Sampak Samanta
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| |
Collapse
|
7
|
Vurucu B, Mert S, Koldaş S, Demirtaş İ, Kasımoğulları R. Design, synthesis and biological evaluation of novel pyrazole derivatives bearing sulfonamide scaffold as antiproliferative agents. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2023. [DOI: 10.1007/s13738-022-02738-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
8
|
Li X, Yang Q, Lorsbach BA, Buysse A, Niyaz N, Cui L, Ross R. Toward the Development of a Manufacturing Process for the Insecticide Tyclopyrazoflor. Part I. Evaluation of Strategies using Ullmann Coupling of Pyrazole Derivatives. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Xiaoyong Li
- Process Sciences & Technology, Small Molecule Discovery and Development, Corteva Agriscience, 9330 Zionsville Rd., Indianapolis, Indiana 46268, United States
| | - Qiang Yang
- Process Sciences & Technology, Small Molecule Discovery and Development, Corteva Agriscience, 9330 Zionsville Rd., Indianapolis, Indiana 46268, United States
| | - Beth A. Lorsbach
- Process Sciences & Technology, Small Molecule Discovery and Development, Corteva Agriscience, 9330 Zionsville Rd., Indianapolis, Indiana 46268, United States
| | - Ann Buysse
- Discovery Chemistry, Small Molecule Discovery and Development, Corteva Agriscience, 9330 Zionsville Rd., Indianapolis, Indiana 46268, United States
| | - Noormohamed Niyaz
- Discovery Chemistry, Small Molecule Discovery and Development, Corteva Agriscience, 9330 Zionsville Rd., Indianapolis, Indiana 46268, United States
| | - Li Cui
- Engineering & Process Sciences, Dow Chemical, Midland, Michigan 48674, United States
| | - Ronald Ross
- Discovery Chemistry, Small Molecule Discovery and Development, Corteva Agriscience, 9330 Zionsville Rd., Indianapolis, Indiana 46268, United States
| |
Collapse
|
9
|
Regioselective synthesis of 1,5-diarylpyrazole derivatives from hex-1-en-3-uloses. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
10
|
Beukeaw D, Rattanasupaponsak N, Kittikool T, Phakdeeyothin K, Phomphrai K, Yotphan S. Metal‐Free Site‐Selective Direct Oxidative Phosphorylation of Pyrazolones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
11
|
ghosh SK. β‐Silylmethylene malonate as versatile reagent in organic synthesis. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- sunil kumar ghosh
- Bhabha Atomic Research Centre Bio-Organic Division Trombay 400085 Mumbai INDIA
| |
Collapse
|
12
|
Yang Q, Zhao Y, Ma D. Cu-Mediated Ullmann-Type Cross-Coupling and Industrial Applications in Route Design, Process Development, and Scale-up of Pharmaceutical and Agrochemical Processes. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00050] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Qiang Yang
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, United States
| | - Yinsong Zhao
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| |
Collapse
|
13
|
Dai B, Liu P, He J, Wei Y, Feng Y, Li C. Halogenations of 3-Aryl-1H-pyrazol-5-amines. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1684-0308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractA direct C–H halogenation of 3-aryl-1H-pyrazol-5-amines using N-halogenosuccinimides (NXS; X = Br, I, Cl) in dimethyl sulfoxide at room temperature has been developed. This transformation provides an effective metal-free protocol for the synthesis of novel 4-halogenated pyrazole derivatives with moderate to excellent yields. The method utilizes NXS reagents as cheap and safe halogenating reagents under simple and mild reaction conditions, it has broad substrate scope, and can be used for gram-scale synthesis. The utility of this procedure is established by further transformations of the 4-halogenated products. Mechanism studies show that DMSO plays a dual role of catalyst and solvent.
Collapse
|
14
|
Lamberth C. Organic Isocyanates and Isothiocyanates: Versatile Intermediates in Agrochemistry. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1678-8528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
AbstractIn recent decades, organic isocyanates and isothiocyanates have been often applied as reactive intermediates in research syntheses or manufacturing routes of many agrochemicals. These heterocumulenes allowed the installation of crucial carboxylic functions, such as carbamates, ureas, and semicarbazones, but have also been used for the construction of five- and six-membered heterocycles, such as tetrazolones, thiazoles, and uracils.1 Introduction2 Preparation of Carboxylic Acid Functions3 Preparation of Heterocyclic Rings4 Conclusion
Collapse
|
15
|
Fang Z, Jin Q, Wang X, Ning Y. Metal-free [2 + 1 + 3] Cycloaddition of Trifluoroacetaldehyde N-Sulfonylhydrazones with Hexahydro-1,3,5-triazines Leading to Trifluoromethylated 2,3,4,5-Tetrahydro-1,2,4-triazines. J Org Chem 2022; 87:2966-2974. [PMID: 35133818 DOI: 10.1021/acs.joc.1c02810] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A transition-metal-free [2 + 1 + 3] cycloaddition of trifluoroacetaldehyde N-sulfonylhydrazone and hexahydro-1,3,5-triazine was described. This operationally simple protocol provides a general synthesis of diverse trifluoromethylated 2,3,4,5-tetrahydro-1,2,4-triazines in 81-97% yield with a broad substrate scope, including aryl, benzyl, and alkyl hexahydro-1,3,5-triazine.
Collapse
Affiliation(s)
- Zhongxue Fang
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224007, China
| | - Qihao Jin
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224007, China
| | - Xinyu Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yongquan Ning
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| |
Collapse
|
16
|
Mondal R, Guin AK, Pal S, Mondal S, Paul ND. Sustainable synthesis of pyrazoles using alcohols as the primary feedstock by an iron catalyzed tandem C–C and C–N coupling approach. Org Chem Front 2022. [DOI: 10.1039/d2qo01196d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report two new efficient iron-catalyzed synthetic strategies for multicomponent synthesis of tri-substituted pyrazoles using biomass-derived alcohols as the primary feedstock.
Collapse
Affiliation(s)
- Rakesh Mondal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Amit Kumar Guin
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Subhasree Pal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Sucheta Mondal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Nanda D. Paul
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| |
Collapse
|
17
|
Bamoniri A, Yaghmaeiyan N. Kaolin sulfonic acid nanoparticles: An efficient and reusable heterogeneous catalyst for the synthesis of highly substituted pyrazoles via a green protocol. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
|
18
|
Ibrahim NA, El-Kaed SA, Rizk SA, Ali AK. Regioselective Synthesis, Spectroscopic Characterization, and Computational Chemical Study of Spiro[Indoline-3,4’-Pyrazolo[3,4-b] Pyridine Derivatives as Agrochemical Agents. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.1942083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Sarah Ahmed El-Kaed
- Central Lab. of Organic Agriculture, Agricultural Research Center (ARC), Giza, Egypt
| | - Sameh Ahmed Rizk
- Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Ali Khalil Ali
- Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| |
Collapse
|
19
|
Gulia N, Małecki M, Szafert S. Direct Preparation of N-Substituted Pyrazoles from Primary Aliphatic or Aromatic Amines. J Org Chem 2021; 86:9353-9359. [PMID: 34197110 PMCID: PMC8389898 DOI: 10.1021/acs.joc.1c00606] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Despite a large number
of synthesis procedures for pyrazoles known
today, those directly employing primary amines as substrates are rare.
Herein, we report an original method for the preparation of N-alkyl and N-aryl pyrazoles from primary
aliphatic or aromatic amines as a limiting reagent of the reaction.
The protocol utilizes no inorganic reagents and requires a short reaction
time, mild conditions, and the use of structurally simple and commercially
available starting reagents. During this study, pyrazoles containing
a wide variety of N-substituents were obtained using
the same procedure for both aliphatic and aromatic amines.
Collapse
Affiliation(s)
- Nurbey Gulia
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Marcin Małecki
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Sławomir Szafert
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| |
Collapse
|
20
|
Panigrahi A, Muniraj N, Prabhu KR. N-Triflination of pyrazolones: a new method for N-S bond formation. Org Biomol Chem 2021; 19:5534-5538. [PMID: 34105585 DOI: 10.1039/d1ob00862e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A simple method, which takes place quickly in 5 min, is developed for the N-triflination of pyrazolones using CF3SO2Na (Langlois reagent) and phenyliodine(iii)bis(trifluoroacetate) (PIFA). This reaction takes place at the imine nitrogen centre instead of the more reactive C4-position, forming a new N-S bond. A variety of pyrazolone derivatives were subjected to the reaction. Unlike the previous reports on sulfenylation or sulfonylation of pyrazolone, wherein the corresponding C-S bond is formed, this new method leads to the formation of the hetero-hetero atom bond (N-S bond) at room temperature.
Collapse
Affiliation(s)
- Ahwan Panigrahi
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| | - Nachimuthu Muniraj
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| |
Collapse
|
21
|
Devi L, Sharma G, Kant R, Shukla SK, Rastogi N. Regioselective synthesis of functionalized pyrazole-chalcones via a base mediated reaction of diazo compounds with pyrylium salts. Org Biomol Chem 2021; 19:4132-4136. [PMID: 33870359 DOI: 10.1039/d1ob00274k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A base-mediated reaction of triaryl/alkyl pyrylium tetrafluoroborate salts with α-diazo-phosphonates, sulfones and trifluoromethyl compounds affords the corresponding functionalized pyrazole-chalcones as 5-P-5 and 3-P-3 tautomeric mixture. The reaction proceeds through an initial nucleophilic addition of diazo substrates to pyrylium salts followed by a base-mediated pyrylium ring-opening and intramolecular 1,5-cyclization to afford formal 1,3-dipolar cycloaddition products. The products underwent a Nazarov-type cyclization upon hydride reduction followed by acidic-workup, furnishing the corresponding indenyl-pyrazoles in high yields.
Collapse
Affiliation(s)
- Lalita Devi
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow-226031, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Gaurav Sharma
- Sophisticated Analytical Instrument Facility, CSIR-Central Drug Research Institute, Lucknow-226031, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ruchir Kant
- Molecular & Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow-226031, India
| | - Sanjeev K Shukla
- Sophisticated Analytical Instrument Facility, CSIR-Central Drug Research Institute, Lucknow-226031, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Namrata Rastogi
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow-226031, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| |
Collapse
|
22
|
Golovanov AA, Odin IS, Gusev DM, Vologzhanina AV, Sosnin IM, Grabovskiy SA. Reactivity of Cross-Conjugated Enynones in Cyclocondensations with Hydrazines: Synthesis of Pyrazoles and Pyrazolines. J Org Chem 2021; 86:7229-7241. [PMID: 33955756 DOI: 10.1021/acs.joc.1c00569] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The cyclocondensation of cross-conjugated enynones, dienynones, and trienynones (easily available due to low-cost starting compounds) with arylhydrazines leads to the regioselective synthesis of pyrazole derivatives (dihetaryl-substituted ethens, buta-1,3-diens, and hexa-1,3,5-triens) or results in 4,5-dihydro-1H-pyrazoles in good yield. The reaction path is controlled by the character of the substituent in enynone: the pyrazoles are obtained from the reaction of substrates that contain five-membered heteroaromatic substituents with arylhydrazines, and the 4,5-dihydro-1H-pyrazoles are obtained from the reaction of 1,5-diphenylpent-1-en-4-yn-3-one with arylhydrazines consistently. Despite the presence of a substituent, cyclocondensation of 2-hydrazinylpyridine with all of examined cross-conjugated enynones leads to the formation of pyrazoles. The reaction does not require special conditions (temperature, catalyst, inert atmosphere). The cyclocondensation pathways are determined by the electronic effect of an electron-rich five-membered heteroaromatic ring in the substrate. The synthesis allows use of various substituents and functional groups in enynone and hydrazine. The present method features high yields and simplicity of the product purification. The obtained pyrazoles possess fluorescent properties with a quantum yield up to 31%.
Collapse
Affiliation(s)
| | - Ivan S Odin
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Dmitry M Gusev
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Anna V Vologzhanina
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Science, 28 Vavilova Str., 119991 Moscow, Russia
| | - Ilya M Sosnin
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Stanislav A Grabovskiy
- Ufa Institute of Chemistry, UFRS of the Russian Academy of Science, 71 October Av., 450054 Ufa, Russia
| |
Collapse
|
23
|
Chowdhury R, Dubey AK, Ghosh SK. Organocatalytic Enantioselective Michael Addition of Pyrazol‐5‐ones to β‐Silylmethylene Malonates: Synthesis of Chiral Organosilanes Under Metal‐ free Conditions. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Raghunath Chowdhury
- Bio-Organic Division Bhabha Atomic Research Centre, Trombay Mumbai 400085 India
- Homi Bhabha National Institute Bhabha Atomic Research Centre, Trombay Mumbai 400085 India
| | - Akhil K. Dubey
- Bio-Organic Division Bhabha Atomic Research Centre, Trombay Mumbai 400085 India
| | - Sunil K. Ghosh
- Homi Bhabha National Institute Bhabha Atomic Research Centre, Trombay Mumbai 400085 India
| |
Collapse
|
24
|
Organocatalytic Amination of Pyrazolones with Azodicarboxylates: Scope and Limitations. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100167] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
25
|
Naveen S, Kumara K, Kumar AD, Kumar KA, Zarrouk A, Warad I, Lokanath N. Synthesis, characterization, crystal structure, Hirshfeld surface analysis, antioxidant properties and DFT calculations of a novel pyrazole derivative: Ethyl 1-(2,4-dimethylphenyl)-3-methyl-5-phenyl-1H-pyrazole-4-carboxylate. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129350] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
26
|
|
27
|
Molecular structure, spectroscopic, quantum chemical, topological, molecular docking and antimicrobial activity of 3-(4-Chlorophenyl)-5-[4-propan-2-yl) phenyl-4, 5-dihydro-1H-pyrazol-1-yl] (pyridin-4-yl) methanone. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129286] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
28
|
Penjarla TR, Kundarapu M, Rangan K, Bhattacharya A. Iodine assisted synthesis of CF 3 appended spirodihydrofuryl/cyclopropyl oxindoles by changing the active methylene sources. Org Biomol Chem 2020; 18:9623-9631. [PMID: 33206105 DOI: 10.1039/d0ob01903h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes the synthesis of two distinct types of CF3-containing spirooxindoles by varying the active methylene sources. The reaction was carried out in DMSO, assisted by molecular iodine and Na2CO3via systematic application of Michael reaction and iodine mediated cyclisation. With 5-methyl-2,4-dihydro-3H-pyrazol-3-one as the methylene source, the final products obtained were spirodihydrofuropyrazolyl oxindoles, whereas 1H-indene-1,3(2H)-dione as the methylene source gave the final compounds spirocyclopropyl oxindoles. Modest to good yields were obtained for both the spiro systems.
Collapse
Affiliation(s)
- Thirupathi Reddy Penjarla
- Department of Chemistry, Birla Institute of Technology and Science-Pilani (Hyderabad Campus), Hyderabad-500078, India.
| | | | | | | |
Collapse
|
29
|
Sood S, Kumari M, Kumari P, Kumar A, Singh K. Convenient OPC-VH Mediated Synthesis of 4-Functional Pyrazoles. ORG PREP PROCED INT 2020. [DOI: 10.1080/00304948.2020.1792228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Sumit Sood
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Sirmour, India
| | - Meena Kumari
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Sirmour, India
| | - Poonam Kumari
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Sirmour, India
| | - Anil Kumar
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Sirmour, India
| | - Karan Singh
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Sirmour, India
| |
Collapse
|
30
|
Tairov MA, Levchenko V, Stadniy IA, Dmytriv YV, Dehtiarov SO, Kibalnyi MO, Melnyk AV, Veselovych SY, Borodulin YV, Kolotilov SV, Ryabukhin SV, Volochnyuk DM. Practical Synthetic Method for Functionalized 1-Methyl-3/5-(trifluoromethyl)-1H-pyrazoles. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00300] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Maxim A. Tairov
- Enamine Ltd., 78 Chervonotkatska Street, Kyiv 02094, Ukraine
| | | | - Ivan A. Stadniy
- Enamine Ltd., 78 Chervonotkatska Street, Kyiv 02094, Ukraine
| | - Yurii V. Dmytriv
- Enamine Ltd., 78 Chervonotkatska Street, Kyiv 02094, Ukraine
- National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Peremohy Avenue, Kyiv 03056, Ukraine
| | | | | | - Anton V. Melnyk
- Enamine Ltd., 78 Chervonotkatska Street, Kyiv 02094, Ukraine
| | | | | | - Sergey V. Kolotilov
- L. V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Prospekt Nauki 31, Kyiv 03028, Ukraine
| | - Sergey V. Ryabukhin
- Enamine Ltd., 78 Chervonotkatska Street, Kyiv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, 60 Volodymyrska Street, Kyiv 01601, Ukraine
| | - Dmitriy M. Volochnyuk
- Enamine Ltd., 78 Chervonotkatska Street, Kyiv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, 60 Volodymyrska Street, Kyiv 01601, Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, 5 Murmanska Street, Kyiv 02660, Ukraine
| |
Collapse
|
31
|
Yang X, Zhu J, Bao Y, Ding Z, Yang F, Zhou Q, Chen M. Iodine-Catalyzed Ring Opening of 1,1-Diacylcyclopropanes for Synthesis of Fully Substituted Pyrazole Derivatives. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiuqin Yang
- State Key Laboratory of Natural Medicines; Department of Organic Chemistry; China Pharmaceutical University; 210009 Nanjing P. R. China
| | - Jin Zhu
- State Key Laboratory of Natural Medicines; Department of Organic Chemistry; China Pharmaceutical University; 210009 Nanjing P. R. China
| | - Yishu Bao
- State Key Laboratory of Natural Medicines; Department of Organic Chemistry; China Pharmaceutical University; 210009 Nanjing P. R. China
| | - Ziyu Ding
- State Key Laboratory of Natural Medicines; Department of Organic Chemistry; China Pharmaceutical University; 210009 Nanjing P. R. China
| | - Fulai Yang
- State Key Laboratory of Natural Medicines; Department of Organic Chemistry; China Pharmaceutical University; 210009 Nanjing P. R. China
| | - Qingfa Zhou
- State Key Laboratory of Natural Medicines; Department of Organic Chemistry; China Pharmaceutical University; 210009 Nanjing P. R. China
| | - Ming Chen
- State Key Laboratory of Natural Medicines; Department of Organic Chemistry; China Pharmaceutical University; 210009 Nanjing P. R. China
| |
Collapse
|
32
|
Fricero P, Bialy L, Czechtizky W, Méndez M, Harrity JPA. Design and Synthesis of New Pyrazole‐Based Heterotricycles and their Derivatization by Automated Library Synthesis. ChemMedChem 2020; 15:1634-1638. [DOI: 10.1002/cmdc.202000187] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Indexed: 01/09/2023]
Affiliation(s)
- Prisca Fricero
- Department of ChemistryUniversity of Sheffield Sheffield S3 7HF UK
| | - Laurent Bialy
- Integrated Drug discovery, R&D, Sanofi Aventis Deutschland GmbHIndustriepark Höchst 65926 Frankfurt am Main Germany
| | - Werngard Czechtizky
- Integrated Drug discovery, R&D, Sanofi Aventis Deutschland GmbHIndustriepark Höchst 65926 Frankfurt am Main Germany
- Present address: Respiratory, Inflammation, Autoimmunity IMED Biotech UnitAstraZeneca Pepparedsleden 1, Mölndal SE-431 83 Gothenburg Sweden
| | - María Méndez
- Integrated Drug discovery, R&D, Sanofi Aventis Deutschland GmbHIndustriepark Höchst 65926 Frankfurt am Main Germany
| | | |
Collapse
|
33
|
Sandmeier T, Sievertsen N, Carreira EM. Derailed
Ohira‐Bestmann
Reaction of
γ
,
δ
‐Unsaturated Aldehydes for the Stereoselective Synthesis of Cyclopenta[
c
]pyrazoles. Helv Chim Acta 2020. [DOI: 10.1002/hlca.202000058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Tobias Sandmeier
- Laboratorium für Organische ChemieDepartment of Chemistry and Applied Biosciences ETH-Zürich CH-8093 Zürich Switzerland
| | - Niels Sievertsen
- Laboratorium für Organische ChemieDepartment of Chemistry and Applied Biosciences ETH-Zürich CH-8093 Zürich Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische ChemieDepartment of Chemistry and Applied Biosciences ETH-Zürich CH-8093 Zürich Switzerland
| |
Collapse
|
34
|
Zhao F, Wang K, Wen L, Zhao Z, Hu Y, Xu W, Huang D, Su Y, Wang J, Hu Y. [3+2] Cycloaddition of Trifluoromethylated
N
‐Acylhydrazones with Azomethine Ylides: Synthesis of Trifluoromethylated Imidazolidines. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000057] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Fangxia Zhao
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Ke‐Hu Wang
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Lan Wen
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Zhuanxia Zhao
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Yongqin Hu
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Weigang Xu
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Danfeng Huang
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Yingpeng Su
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Junjiao Wang
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
| | - Yulai Hu
- College of Chemistry and Chemical EngineeringNorthwest Normal University 967 Anning East Road Lanzhou 730070 P. R. China
- State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 P. R.China
| |
Collapse
|
35
|
Lamberth C. Multicomponent reactions in crop protection chemistry. Bioorg Med Chem 2020; 28:115471. [PMID: 32253096 DOI: 10.1016/j.bmc.2020.115471] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/16/2020] [Accepted: 03/26/2020] [Indexed: 11/16/2022]
Abstract
An overview is given of the significance of multicomponent reactions in the synthesis of agrochemicals. The most important applications of multicomponent condensations, such as the Biginelli reaction, Bucherer-Bergs reaction, Hantzsch dihydropyridine synthesis, Kabachnik-Fields reaction, Mannich reaction, Passerini reaction, Petasis reaction, Strecker reaction, Ugi reaction and Willgerodt-Kindler reaction, to the synthesis of herbicidally, fungicidally and insecticidally active compounds are presented. Also the mode of action and biological activity of these multicomponent reaction products are reported.
Collapse
Affiliation(s)
- Clemens Lamberth
- Syngenta Crop Protection AG, Chemical Research, Schaffhauserstrasse 101, CH-4332 Stein, Switzerland.
| |
Collapse
|
36
|
Eshon J, Nicastri KA, Schmid SC, Raskopf WT, Guzei IA, Fernández I, Schomaker JM. Intermolecular [3+3] ring expansion of aziridines to dehydropiperi-dines through the intermediacy of aziridinium ylides. Nat Commun 2020; 11:1273. [PMID: 32152321 PMCID: PMC7062875 DOI: 10.1038/s41467-020-15134-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 02/21/2020] [Indexed: 01/07/2023] Open
Abstract
The importance of N-heterocycles in drugs has stimulated diverse methods for their efficient syntheses. Methods that introduce significant stereochemical complexity are attractive for identifying new bioactive amine chemical space. Here, we report a [3 + 3] ring expansion of bicyclic aziridines and rhodium-bound vinyl carbenes to form complex dehydropiperidines in a highly stereocontrolled rearrangement. Mechanistic studies and DFT computations indicate that the reaction proceeds through formation of a vinyl aziridinium ylide; this reactive intermediate undergoes a pseudo-[1,4]-sigmatropic rearrangement to directly furnish heterocyclic products with net retention at the new C-C bond. In combination with asymmetric silver-catalyzed aziridination, enantioenriched scaffolds with up to three contiguous stereocenters are rapidly delivered. The mild reaction conditions, functional group tolerance, and high stereospecificity of this method are well-suited for appending piperidine motifs to natural product and complex molecules. Ultimately, our work establishes the value of underutilized aziridinium ylides as key intermediates for converting small, strained rings to larger N-heterocycles.
Collapse
Affiliation(s)
- Josephine Eshon
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Kate A Nicastri
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Steven C Schmid
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - William T Raskopf
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Ilia A Guzei
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA
| | - Israel Fernández
- Departamento de Química Orgánica I and Centro de Innovación en Química Avazanda (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI, 53706, USA.
| |
Collapse
|
37
|
Synthesis and oxidation of all isomeric 2-(pyrazolyl)ethanols. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02662-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
38
|
Wang H, Ning Y, Sun Y, Sivaguru P, Bi X. Cycloaddition of Trifluoroacetaldehyde N-Triftosylhydrazone (TFHZ-Tfs) with Alkynes for Synthesizing 3-Trifluoromethylpyrazoles. Org Lett 2020; 22:2012-2016. [DOI: 10.1021/acs.orglett.0c00395] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hongwei Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yongquan Ning
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yue Sun
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Paramasivam Sivaguru
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| |
Collapse
|
39
|
Nguyen QH, Guo SM, Royal T, Baudoin O, Cramer N. Intermolecular Palladium(0)-Catalyzed Atropo-enantioselective C–H Arylation of Heteroarenes. J Am Chem Soc 2020; 142:2161-2167. [DOI: 10.1021/jacs.9b12299] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Qui-Hien Nguyen
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Shu-Min Guo
- University of Basel, Department of Chemistry, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Titouan Royal
- University of Basel, Department of Chemistry, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Olivier Baudoin
- University of Basel, Department of Chemistry, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Nicolai Cramer
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| |
Collapse
|
40
|
Zhu C, Zeng H, Liu C, Cai Y, Fang X, Jiang H. Regioselective Synthesis of 3-Trifluoromethylpyrazole by Coupling of Aldehydes, Sulfonyl Hydrazides, and 2-Bromo-3,3,3-trifluoropropene. Org Lett 2020; 22:809-813. [PMID: 31951135 DOI: 10.1021/acs.orglett.9b04228] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A general and practical strategy for 3-trifluoromethylpyrazole synthesis is reported that occurs by the three-component coupling of environmentally friendly and large-tonnage industrial feedstock 2-bromo-3,3,3-trifluoropropene (BTP), aldehydes, and sulfonyl hydrazides. This highly regioselective three-component reaction is metal-free, catalyst-free, and operationally simple and features mild conditions, a broad substrate scope, high yields, and valuable functional group tolerance. Remarkably, the reactions could be performed on a 100 mmol scale and smoothly afforded the key intermediates for the synthesis of celecoxib, mavacoxib, SC-560, and AS-136A. Preliminary mechanism studies indicated that a 1,3-hydrogen atom transfer process was involved in this transformation.
Collapse
Affiliation(s)
- Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Hao Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Chi Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Yingying Cai
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Xiaojie Fang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. 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 , P. R. China
| |
Collapse
|
41
|
U. Deshmukh S, B. Toche R, W. Sabnis R, J. Takate S, P. Salve S. Synthesis of Novel (Thiazol-5-yl)pyrazoles and Their Antimicrobial Evaluation. HETEROCYCLES 2020. [DOI: 10.3987/com-20-14316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
42
|
Aqua mediated multicomponent reaction under phase transfer catalysis: A novel and green approach to access fused pyrazoles. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2015.08.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
43
|
Lakeland CP, Watson DW, Harrity JPA. Exploiting Synergistic Catalysis for an Ambient Temperature Photocycloaddition to Pyrazoles. Chemistry 2019; 26:155-159. [PMID: 31657486 DOI: 10.1002/chem.201904210] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/16/2019] [Indexed: 12/19/2022]
Abstract
Sydnone-based cycloaddition reactions are a versatile platform for pyrazole synthesis, however they operate under harsh conditions (high temperature and long reaction times). Herein we report a strategy that addresses this limitation utilizing the synergistic combination of organocatalysis and visible-light photocatalysis. This new approach proceeds under ambient conditions and with excellent levels of regiocontrol. Mechanistic studies suggest that photoactivation of sydnones, rather than enamines, is key to the successful implementation of this process.
Collapse
Affiliation(s)
| | - David W Watson
- Chemistry, Oncology R&D, AstraZeneca, Cambridge, CB10 1XL, UK
| | | |
Collapse
|
44
|
Yang Q, Babij NR, Good S. Potential Safety Hazards Associated with Pd-Catalyzed Cross-Coupling Reactions. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00377] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qiang Yang
- Crop Protection Product Design & Process R&D, Corteva Agriscience, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Nicholas R. Babij
- Crop Protection Product Design & Process R&D, Corteva Agriscience, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Steffen Good
- Crop Protection Product Design & Process R&D, Corteva Agriscience, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| |
Collapse
|
45
|
Sharma A, Sharma V, Chimni SS. Organocatalytic enantioselective conjugate addition of pyrazolin-5-ones to arylomethylidene malonates. Org Biomol Chem 2019; 17:9514-9523. [PMID: 31657819 DOI: 10.1039/c9ob01700c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient asymmetric organocatalytic conjugate addition reaction of pyrazolin-5-ones with arylomethylidene malonates has been successfully developed by employing bifunctional Cinchona derived thiourea organocatalysts. The protocol provides straightforward access to pyrazole substituted scaffolds in good yields with high stereocontrol.
Collapse
Affiliation(s)
- Arun Sharma
- Department of Chemistry, Guru Nanak Dev University, Amritsar-143005, Punjab, India
| | | | | |
Collapse
|
46
|
Structural characterization of benzoyl-1H-pyrazole derivatives obtained in lemon juice medium: Experimental and theoretical approach. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
47
|
Synthesis and fungicidal activity of novel pyrazole derivatives containing 5-Phenyl-2-Furan. Bioorg Med Chem 2019; 27:115048. [PMID: 31439387 DOI: 10.1016/j.bmc.2019.115048] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/31/2019] [Accepted: 08/15/2019] [Indexed: 11/21/2022]
Abstract
Pyrazole constitutes an important heterocyclic family covering a broad range of synthetic as well as natural products that exhibit numerous chemical, biological, agrochemical and pharmacological properties. In order to explore compounds with good fungicidal activity, a series of new pyrazole derivatives containing 5-phenyl-2-furan were designed and synthesized. In vitro and in vivo fungicidal activities were evaluated and the compound ethyl-1-(5-phenylfuran-2-carbonyl)-5-propyl-1H-pyrazole-3-carboxylate (I8) displayed significant fungicidal activity against various fungi, especially against P. infestans. The structures of the novel pyrazole derivatives were confirmed by 1H NMR, 13C NMR, MS, elemental analysis and X-ray single crystal diffraction. Further study showed that compound I8 might act on the synthesis of cell walls from morphological and ultrastructural studies by SEM and TEM. The results also revealed that compound I8 could block the nutritional transportation leading to cells senescence and death. These results suggested that the novel pyrazole derivatives proved to be promising lead compounds.
Collapse
|
48
|
|
49
|
Gudala S, Ambati SR, Patel JL, Vedula RR, Penta S. An Efficient Synthesis of Pyrazolyl‐1,2,3‐thiadiazoles
via
Hurd–Mori Reaction. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Satish Gudala
- Department of ChemistryNational Institute of Technology Raipur 492010 CG India
| | - Srinivasa Rao Ambati
- Department of ChemistryNational Institute of Technology Raipur 492010 CG India
- Department of Research and DevelopmentMSN R&D Center Pashamylarram, Medak 502307 TS India
| | - Jeevan Lal Patel
- Department of ChemistryNational Institute of Technology Raipur 492010 CG India
| | - Rajeswar Rao Vedula
- Department of ChemistryNational Institute of Technology Warangal Telangana India
| | - Santhosh Penta
- Department of ChemistryNational Institute of Technology Raipur 492010 CG India
| |
Collapse
|
50
|
Abstract
The compound, 4-[(3,5-dimethyl-1H-pyrazol-1-yl)methyl]-4-methyl-2-phenyl-4,5-dihydrooxazole 2 was prepared in high yield, through nucleophilic substitution reaction of the O-tosyl oxazoline derivative 1, by heating in dimethyl sulfoxide (DMSO) and in presence of KOH as base. The structure of the synthesized compound was established on the basis of NMR spectroscopy (1H, 13C), MS data and elemental analysis.
Collapse
|