1
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Sarkar K, Kumar P, Mule A, Maji B. Divergent Synthesis of Pyrazoles via Manganese Pincer Complex Catalyzed Acceptorless Dehydrogenative Coupling Reactions. Chemistry 2024; 30:e202401105. [PMID: 38655822 DOI: 10.1002/chem.202401105] [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: 03/19/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 04/26/2024]
Abstract
This report detailed the synthesis of multi-substituted pyrazoles through the acceptorless dehydrogenative coupling (ADC) reaction catalyzed by a well-defined manganese(I)-pincer complex. Symmetrically substituted pyrazoles were synthesized by reacting 1,3-diols with hydrazines. Unsymmetrically substituted pyrazoles were selectively made via the ADC of primary alcohols with methyl hydrazones. Water and hydrogen are liberated as the green byproducts. The endurance of these methodologies has been presented by producing 30 substrates with varied functionalities. Model reactions were scaled up to demonstrate practicability. The reaction rate and order were measured to transparent the involvement of the reagents during catalysis. Control experiments elucidated the plausible reaction mechanisms.
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Affiliation(s)
- Koushik Sarkar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, 741246, India
| | - Pramod Kumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, 741246, India
| | - Arjun Mule
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, 741246, India
| | - Biplab Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, 741246, India
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2
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Rangraz Z, Amini MM, Habibi Z. One-Pot Synthesis of 1,3,5-Trisubstitued Pyrazoles via Immobilized Thermomyces lanuginosus Lipase (TLL) on a Metal-Organic Framework. ACS OMEGA 2024; 9:19089-19098. [PMID: 38708258 PMCID: PMC11064201 DOI: 10.1021/acsomega.3c09875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 04/04/2024] [Accepted: 04/08/2024] [Indexed: 05/07/2024]
Abstract
A regioselective enzyme-catalyzed system is selected for the synthesis of 1,3,5-trisubstituted pyrazole derivatives by adding phenyl hydrazines, nitroolefins, and benzaldehydes. The reaction is performed in a one-pot vessel with a yield ranging from 49 to 90%. TLL@MMI, immobilized Thermomyces lanuginosus lipase (TLL) on a multivariate of MOF-5/IRMOF-3 (MMI), showed good performance for the catalysis of this reaction. The prepared biocatalyst was characterized by FTIR, XRD, SEM, and EDX. The thermal and solvent stability of TLL@MMI was investigated in MeOH and EtOH after 24 h incubation. In the presence of 100% concentrations of EtOH, TLL@MMI has 80% activity.
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Affiliation(s)
- Zeynab Rangraz
- Department
of Organic Chemistry, Faculty of Chemistry, Shahid Beheshti University, G.C., Tehran 1983969411, Iran
| | - Mostafa M. Amini
- Department
of Inorganic Chemistry, Faculty of Chemistry, Shahid Beheshti University, G.C., Tehran 1983963113, Iran
| | - Zohreh Habibi
- Department
of Organic Chemistry, Faculty of Chemistry, Shahid Beheshti University, G.C., Tehran 1983969411, Iran
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3
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Pal K, Srinivasu V, Biswas S, Sureshkumar D. Visible light-induced organo-photocatalyzed route to synthesize substituted pyrazoles. Org Biomol Chem 2024; 22:2384-2388. [PMID: 38441915 DOI: 10.1039/d4ob00248b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
The synthesis of tetra-substituted pyrazoles holds significant synthetic value and has been accomplished through an organo-photocatalyzed decarboxylative intramolecular cyclization using readily available 1,2-diaza-1,3-dienes and α-ketoacids. This method allows for the systematic synthesis of substituted pyrazole derivatives. Notably, this approach is characterized by its metal-free and oxidant-free nature, offering distinct advantages such as short reaction times and exceptionally mild reaction conditions. The developed methodology enables the efficient construction of tetra-substituted pyrazoles, expanding the available chemical space for exploration and opening up potential applications in various scientific fields.
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Affiliation(s)
- Koustav Pal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741246, India.
| | - Vinjamuri Srinivasu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741246, India.
| | - Sourabh Biswas
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741246, India.
| | - Devarajulu Sureshkumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741246, India.
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4
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Zhong B, Chen F, Ge Y, Liu D. Developing a fast and catalyst-free protocol to form C=N double bond with high functional group tolerance. ROYAL SOCIETY OPEN SCIENCE 2023; 10:231263. [PMID: 37800155 PMCID: PMC10548102 DOI: 10.1098/rsos.231263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 09/12/2023] [Indexed: 10/07/2023]
Abstract
The carbon-nitrogen double bond (C=N) is a fundamentally important functional group in organic chemistry. This is largely due to the fact that C=N acts as electrophilic synthon to give nitrogen-containing compounds. Here, we report the condensation of primary amine or hydrazine with very electron-deficient aldehyde to form C=N bond in the absence of any catalysts (metals and acids). The protocol performs at room temperature and applies water as co-solvent. Two hundred examples are presented here. With its intrinsic advantages of wide substrate scopes, excellent efficiency (high yields and short reaction time), operational simplicity, mild condition (room temperature as reaction temperature, no catalysts, no additions, water as co-solvent and opening to air) and available starting materials, the protocol can be compatible with various drugs, prodrugs, dyes and pharmacophores containing primary amino group. In addition, we also successfully apply this protocol to rapidly synthesize the core scaffolds of bioactive molecules.
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Affiliation(s)
- Bin Zhong
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Feng Chen
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Yushu Ge
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Dan Liu
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
- The First Affiliated Hospital of University of Science and Technology of China, Hefei, Anhui 230001, People's Republic of China
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5
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Festersen L, Czekelius C. Photocatalytic Cascade Cyclization of Aryl Haloalkynyl Ketones Forming Cyclopenta[ b]naphthalene Derivatives. Org Lett 2023; 25:3553-3558. [PMID: 37154431 DOI: 10.1021/acs.orglett.3c01197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
An efficient metal-free, photoredox-mediated cascade cyclization of aryl 1-haloalk-5-ynyl ketones has been developed. Using catalytic amounts of eosin Y (EY) and EtNMe2 as a reductive quencher, various aryl 1-haloalk-5-ynyl ketones have been transformed into the corresponding cyclization products in up to 98% yield. As a result, synthetic access to differently α-functionalized cyclopenta[b]naphthones and direct construction of cyclopenta[b]naphtholes has been developed.
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Affiliation(s)
- Lea Festersen
- Institute of Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40255 Düsseldorf, Germany
| | - Constantin Czekelius
- Institute of Organic Chemistry and Macromolecular Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40255 Düsseldorf, Germany
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6
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Kumar R, Singh H, Mazumder A, Yadav RK. Synthetic Approaches, Biological Activities, and Structure-Activity Relationship of Pyrazolines and Related Derivatives. Top Curr Chem (Cham) 2023; 381:12. [PMID: 37029841 DOI: 10.1007/s41061-023-00422-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 03/22/2023] [Indexed: 04/09/2023]
Abstract
It has been established that pyrazolines and their analogs are pharmacologically active scaffolds. The pyrazoline moiety is present in several marketed molecules with a wide range of uses, which has established its importance in pharmaceutical and agricultural sectors, as well as in industry. Due to its broad-spectrum utility, scientists are continuously captivated by pyrazolines and their derivatives to study their chemistry. Pyrazolines or their analogs can be prepared by several synthesis strategies, and the focus will always be on new greener and more economical ways for their synthesis. Among these methods, chalcones, hydrazines, diazo compounds, and hydrazones are most commonly applied under different reaction conditions for the synthesis of pyrazoline and its analogs. However, there is scope for other molecules such as Huisgen zwitterions, different metal catalysts, and nitrile imine to be used as starting reagents. The present article consists of recently reported synthetic protocols, pharmacological activities, and the structure-activity relationship of pyrazoline and its derivatives, which will be very useful to researchers.
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Affiliation(s)
- Rajnish Kumar
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India.
| | - Himanshu Singh
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Avijit Mazumder
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Ranjeet Kumar Yadav
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
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7
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Bhaskaran RP, Sreelekha MK, Babu BP. Metal‐free Synthesis of Trisubstituted Pyrazoles by the Reaction Between Hydrazones and Activated Olefins. ChemistrySelect 2022. [DOI: 10.1002/slct.202202773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Rasmi P. Bhaskaran
- Department of Chemistry National Institute of Technology Karnataka Surathkal Mangalore INDIA – 575025
| | - Mariswamy K. Sreelekha
- Department of Chemistry National Institute of Technology Karnataka Surathkal Mangalore INDIA – 575025
| | - Beneesh P. Babu
- Department of Chemistry National Institute of Technology Karnataka Surathkal Mangalore INDIA – 575025
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8
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Jacob RG, Hartwig D, Nascimento JER, Abib PB, Ebersol CP, Nunes PP, Birmann PT, Casaril AM, Savegnago L, Schumacher RF. Sequential one-pot synthesis and antioxidant evaluation of 5-amino-4-(arylselanyl)-1H-pyrazoles. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Katiyar S, Kumar A, Sashidhara KV. Silver-catalyzed decarboxylative cyclization for the synthesis of substituted pyrazoles from 1,2-diaza-1,3-dienes and α-keto acids. Chem Commun (Camb) 2022; 58:7297-7300. [PMID: 35678363 DOI: 10.1039/d2cc01793h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A silver-catalyzed decarboxylative cyclization process has been developed for the synthesis of substituted pyrazoles from the readily available 1,2-diaza-1,3-dienes and α-keto acids. Under the optimized conditions, a series of multisubstituted pyrazoles were well prepared in moderate to good yields. In addition, the synthetic utility of this protocol has been demonstrated by synthesizing analogs of FDA approved drugs such as anti-inflammatory drug, lonazolac and antiobesity drug, rimonabant.
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Affiliation(s)
- Sarita Katiyar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, UP, India. .,Academy of Scientific and Innovative Research, CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Sector 19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh - 201002, India
| | - Abhishek Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, UP, India.
| | - Koneni V Sashidhara
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, UP, India. .,Academy of Scientific and Innovative Research, CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Sector 19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh - 201002, India.,Sophisticated Analytical Instrument Facility & Research, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, Lucknow 226031, UP, India
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10
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Kvasovs N, Gevorgyan V. Accessing Illusive E Isomers of α-Ester Hydrazones via Visible-Light-Induced Pd-Catalyzed Heck-Type Alkylation. Org Lett 2022; 24:4176-4181. [PMID: 35653178 PMCID: PMC10122867 DOI: 10.1021/acs.orglett.2c01409] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A visible-light-induced Pd-catalyzed stereoselective synthesis of alkylated ester hydrazones has been developed. This method operates via generation of a nucleophilic carbon-centered radical from alkyl bromide, iodide, or redox-active ester, followed by its addition to hydrazone, and a subsequent desaturation by palladium. The majority of products have E configuration, which are inaccessible by conventional condensation methods. In addition, a sequential C,N-alkylation protocol has been developed: a reaction between 1,3-dihalides and glyoxylate-derived hydrazone, delivering tetrahydropyridazines.
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Affiliation(s)
- Nikita Kvasovs
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
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11
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Kumar P, Sood S, Kumar A, Verma A, Kumar L, Kumar S, Kumar V, Kumar A, Singh K. 1,3,4-Trisubstituted Pyrazoles: Synthesis, Antimicrobial Evaluation, and Time Resolved Studies. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2058968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Parmod Kumar
- Department of Chemistry, School of Basic and Applied Sciences, Lingaya's Vidyapeeth, Faridabad, Haryana, India
| | - Sumit Sood
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Baru Sahib, District Sirmaur, Himachal Pradesh, India
| | - Anil Kumar
- Department of Chemistry, Akal College of Basic Sciences, Eternal University, Baru Sahib, District Sirmaur, Himachal Pradesh, India
| | - Anurakshee Verma
- Department of Chemistry, School of Basic and Applied Sciences, Lingaya's Vidyapeeth, Faridabad, Haryana, India
| | - Lalit Kumar
- Department of Environmental Science, Indira Gandhi University, Rewari, Haryana, India
| | - Sunil Kumar
- Department of Physics, Indira Gandhi University, Rewari, Haryana, India
| | - Vijay Kumar
- Department of Physics, Indira Gandhi University, Rewari, Haryana, India
| | - Anil Kumar
- Department of Chemistry, Arya PG College Panipat, Haryana, India
| | - Karan Singh
- Department of Chemistry, Indira Gandhi University, Rewari, Haryana, India
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12
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Zhang D, Ren L, Liu A, Li W, Liu Y, Gu Q. One-pot solvent-free synthesis of 1,3,5-trisubstituted 1H-pyrazoles catalyzed by H3[PW12O40]/SiO2 under microwave irradiation. MONATSHEFTE FUR CHEMIE 2022. [DOI: 10.1007/s00706-022-02902-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Zhang XJ, Zhang J, Xu YN, Li YM, Chi M, Yan Y, Wu RX, Zhang HR, Zhu YP. Cascade Wolff Rearrangement/Acylation: A Metal-Free and Eco-Friendly Approach for 4-Hydroxy-pyrazolo[3,4- b]pyridin-6-ones and N-Pyrazole Amides Synthesis from 5-Aminopyrazoles and α-Diazoketones. J Org Chem 2021; 86:17471-17481. [PMID: 34797656 DOI: 10.1021/acs.joc.1c02165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A highly chemoselective cascade Wolff rearrangement/acylation reaction between 5-aminopyrazoles and diazo compounds has been developed. The protocol can facilitate the switchable synthesis of 4-hydroxy-pyrazolo[3,4-b]pyridin-6-ones and N-pyrazole amides with the merits of a broad substrate scope, high functional group compatibility, and green and sustainable performance manner. All reactions proceeded efficiently without any catalyst and additives (acid and base) and resulted in the release of benign N2, wherein diethyl carbonate served as a green benign solvent.
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Affiliation(s)
- Xiang-Jin Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Jie Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Yu-Ning Xu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Yi-Ming Li
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Man Chi
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Yu Yan
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Rui-Xue Wu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Hui-Ru Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Yan-Ping Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
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14
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Lv Y, Meng J, Li C, Wang X, Ye Y, Sun K. Update on the Synthesis of N‐Heterocycles via Cyclization of Hydrazones (2017–2021). Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101184] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yunhe Lv
- College of Chemistry and Chemical Engineering Anyang Normal University Anyang 4550008 People's Republic of China
| | - Jianping Meng
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Chen Li
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Xin Wang
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Yong Ye
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Kai Sun
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
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15
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Pyrazole Scaffold Synthesis, Functionalization, and Applications in Alzheimer's Disease and Parkinson's Disease Treatment (2011-2020). Molecules 2021; 26:molecules26051202. [PMID: 33668128 PMCID: PMC7956461 DOI: 10.3390/molecules26051202] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/20/2021] [Accepted: 02/22/2021] [Indexed: 11/17/2022] Open
Abstract
The remarkable prevalence of pyrazole scaffolds in a versatile array of bioactive molecules ranging from apixaban, an anticoagulant used to treat and prevent blood clots and stroke, to bixafen, a pyrazole-carboxamide fungicide used to control diseases of rapeseed and cereal plants, has encouraged both medicinal and organic chemists to explore new methods in developing pyrazole-containing compounds for different applications. Although numerous synthetic strategies have been developed in the last 10 years, there has not been a comprehensive overview of synthesis and the implication of recent advances for treating neurodegenerative disease. This review first presents the advances in pyrazole scaffold synthesis and their functionalization that have been published during the last decade (2011-2020). We then narrow the focus to the application of these strategies in the development of therapeutics for neurodegenerative diseases, particularly for Alzheimer's disease (AD) and Parkinson's disease (PD).
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16
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Kolla ST, Somanaboina R, Bhimapaka CR. TBHP/Cu(OAc)2 mediated oxidation of pyrazolines: A convenient method for the preparation of pyrazoles. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1885716] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Sai Teja Kolla
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Ramya Somanaboina
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - China Raju Bhimapaka
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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17
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Li D, Qiu S, Chen Y, Wu L. K
2
CO
3
‐Promoted Pyrazoles Synthesis from 1,3‐Dipolar Cycloaddition of
N
‐Tosylhydrazones with Acetylene Gas. ChemistrySelect 2020. [DOI: 10.1002/slct.202003067] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Dongying Li
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education Hainan Normal University No.99, Longkun South Road Haikou 571158 P. R. China
| | - Shanguang Qiu
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education Hainan Normal University No.99, Longkun South Road Haikou 571158 P. R. China
| | - Yuxue Chen
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education Hainan Normal University No.99, Longkun South Road Haikou 571158 P. R. China
| | - Luyong Wu
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education Hainan Normal University No.99, Longkun South Road Haikou 571158 P. R. China
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18
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Zhou Y, Wu M, Liu Y, Cheng C, Zhu G. Synthesis of Polysubstituted Pyrroles via Silver-Catalyzed Oxidative Radical Addition of Cyclopropanols to Imines. Org Lett 2020; 22:7542-7546. [PMID: 32915585 DOI: 10.1021/acs.orglett.0c02735] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A silver-catalyzed formal [3 + 2] cycloaddition reaction, with cyclopropanols as a C3 subunit and imines as a two-atom subunit, is developed. The reaction takes place under mild conditions and produces a broad array of polysubstituted pyrroles in medium to high yields. It represents the first example of oxidative radical addition to imines, thus offering a new choice for the direct C-H functionalization of imines.
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Affiliation(s)
- Yulu Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Mingchang Wu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Yi Liu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Cungui Cheng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
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19
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Cardinale L, Neumeier M, Majek M, Jacobi von Wangelin A. Aryl Pyrazoles from Photocatalytic Cycloadditions of Arenediazonium. Org Lett 2020; 22:7219-7224. [DOI: 10.1021/acs.orglett.0c02514] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Luana Cardinale
- Department of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146 Hamburg, Germany
| | - Michael Neumeier
- Department of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146 Hamburg, Germany
| | - Michal Majek
- Department of Organic Chemistry, Comenius University, Mlynská dolina, Ilkovičova 6, 84215 Bratislava, Slovakia
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20
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Aegurla B, Jarwal N, Peddinti RK. Denitrative imino-diaza-Nazarov cyclization: synthesis of pyrazoles. Org Biomol Chem 2020; 18:6100-6107. [PMID: 32785358 DOI: 10.1039/d0ob01200a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An iodine-catalyzed denitrative imino-diaza-Nazarov cyclization (DIDAN) methodology has been developed for the synthesis of pyrazoles with high to excellent yields by using α-nitroacetophenone derivatives and in situ generated hydrazones. The key transformation of this oxidative 4π-electrocyclization proceeds through an enamine-iminium ion intermediate. This rapid one-pot DIDAN protocol results in the selective generation of C-C and C-N bonds and cleavage of a C-N bond.
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Affiliation(s)
- Balakrishna Aegurla
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Nisha Jarwal
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Rama Krishna Peddinti
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
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21
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Hassani H, Jahani Z. Synthesis of 1,3,5-Trisubstituted Pyrazoles and Hydrazones Using
Fe3O4@CeO2
Nanocomposite as an Efficient Heterogeneous Nanocatalyst. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1070428020030185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Singh P, Nath M. A Concise Account on Eco-friendly Synthetic Strategies for Pyrazole Heterocycles. CURRENT GREEN CHEMISTRY 2019. [DOI: 10.2174/2213346106666191026094131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Five membered nitrogen heterocycles are historically known to exhibit diverse therapeutic
properties. In particular, the pyrazole analogues have shown a wide range of pharmacological profiles
and a number of drugs containing this scaffold approved for the treatment of various ailments and
disorders. Hence, a lot of efforts have been made to develop efficient synthetic strategies for the
preparation of a variety of pyrazoles in the past several decades. However, this review describes the
environmentally benign protocols for the synthesis of substituted and fused pyrazole molecules.
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Affiliation(s)
- Pargat Singh
- Department of Chemistry, Faculty of Science, University of Delhi, Delhi 110 007, India
| | - Mahendra Nath
- Department of Chemistry, Faculty of Science, University of Delhi, Delhi 110 007, India
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23
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Mamidala R, Biswal P, Subramani MS, Samser S, Venkatasubbaiah K. Palladacycle-Phosphine Catalyzed Methylation of Amines and Ketones Using Methanol. J Org Chem 2019; 84:10472-10480. [DOI: 10.1021/acs.joc.9b00983] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ramesh Mamidala
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
| | - Priyabrata Biswal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
| | - M. Siva Subramani
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
| | - Shaikh Samser
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
| | - Krishnan Venkatasubbaiah
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar-752050, Odisha, India
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24
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Lead halide perovskites for photocatalytic organic synthesis. Nat Commun 2019; 10:2843. [PMID: 31253792 PMCID: PMC6599021 DOI: 10.1038/s41467-019-10634-x] [Citation(s) in RCA: 151] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 05/16/2019] [Indexed: 11/24/2022] Open
Abstract
Nature is capable of storing solar energy in chemical bonds via photosynthesis through a series of C–C, C–O and C–N bond-forming reactions starting from CO2 and light. Direct capture of solar energy for organic synthesis is a promising approach. Lead (Pb)-halide perovskite solar cells reach 24.2% power conversion efficiency, rendering perovskite a unique type material for solar energy capture. We argue that photophysical properties of perovskites already proved for photovoltaics, also should be of interest in photoredox organic synthesis. Because the key aspects of these two applications are both relying on charge separation and transfer. Here we demonstrated that perovskites nanocrystals are exceptional candidates as photocatalysts for fundamental organic reactions, for example C–C, C–N and C–O bond-formations. Stability of CsPbBr3 in organic solvents and ease-of-tuning their bandedges garner perovskite a wider scope of organic substrate activations. Our low-cost, easy-to-process, highly-efficient, air-tolerant and bandedge-tunable perovskites may bring new breakthrough in organic chemistry. While photoredox catalysis provides organic chemistry new avenues for chemical reactions, typical photocatalysts require expensive noble metals and show modest stabilities. Here, authors examine lead halide perovskites nanocrystals as stable and tunable photoredox catalysts for organic synthesis.
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25
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Kandasamy M, Ganesan B, Hung MY, Lin WY. Fast and Efficient Continuous Flow Method for the Synthesis of Ynones and Pyrazoles. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900468] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mohanraj Kandasamy
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Balaji Ganesan
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Min-Yuan Hung
- Centre for Research Resources and Development; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Wei-Yu Lin
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
- Department of Medical Research; Kaohsiung Medical University Hospital; 807 Kaohsiung Taiwan
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26
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Duan L, Zhou H, Gu Y, Gong P, Qin M. The use of enaminones and enamines as effective synthons for MSA-catalyzed regioselective synthesis of 1,3,4-tri- and 1,3,4,5-tetrasubstituted pyrazoles. NEW J CHEM 2019. [DOI: 10.1039/c9nj03701b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In the present work, an efficient regioselective synthesis of 1,3,4-tri- and 1,3,4,5-tetrasubstituted pyrazoles via a methanesulfonic acid (MSA)-catalyzed reaction of hydrazones with enaminones or enamines is reported.
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Affiliation(s)
- Liancheng Duan
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
- Syngenta Jealott's Hill International Research Center
| | - Hui Zhou
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
- Syngenta Jealott's Hill International Research Center
| | - Yucheng Gu
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
- Syngenta Jealott's Hill International Research Center
| | - Ping Gong
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
- Syngenta Jealott's Hill International Research Center
| | - Mingze Qin
- Key Laboratory of Structure-based Drug Design and Discovery (Shenyang Pharmaceutical University)
- Ministry of Education
- Shenyang 110016
- People's Republic of China
- Syngenta Jealott's Hill International Research Center
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27
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Thirukovela NS, Balaboina R, Botla V, Vadde R, Jonnalagadda SB, Vasam CS. One-pot regioselective synthesis of substituted pyrazoles and isoxazoles in PEG-400/water medium by Cu-free nano-Pd catalyzed sequential acyl Sonogashira coupling–intramolecular cyclization. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01335k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Catalyst efficacy of in situ generated Pd-nanoparticles in the regioselective one-pot synthesis of substituted pyrazoles and isoxazoles via sequential coupling-cyclization methodology in environmentally benign medium is described.
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28
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Chen Y, Lu LQ, Yu DG, Zhu CJ, Xiao WJ. Visible light-driven organic photochemical synthesis in China. Sci China Chem 2018. [DOI: 10.1007/s11426-018-9399-2] [Citation(s) in RCA: 240] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Panda S, Pradhan N, Manna D. Ring-Opening of Indoles: An Unconventional Route for the Transformation of Indoles to 1 H-Pyrazoles Using Lewis Acid. ACS COMBINATORIAL SCIENCE 2018; 20:573-578. [PMID: 30199224 DOI: 10.1021/acscombsci.8b00071] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An unusual transformation of indoles to pyrazoles via an aromatic ring-opening strategy has been developed. The salient feature of this strategy involves the C2-N1 bond opening and concomitant cyclization reaction of the C2═C3 bond of the indole moiety with the tosylhydrazone, which proceeds under transition-metal and ligand free conditions. This ring-opening functionalization of indoles provides a wide scope of differently substituted pyrazoles.
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Affiliation(s)
- Subhankar Panda
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Nirmalya Pradhan
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Debasis Manna
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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30
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Ma M, Hao W, Ma L, Zheng Y, Lian P, Wan X. Interception of Radicals by Molecular Oxygen and Diazo Compounds: Direct Synthesis of Oxalate Esters Using Visible-Light Catalysis. Org Lett 2018; 20:5799-5802. [DOI: 10.1021/acs.orglett.8b02487] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Meihua Ma
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Weiwei Hao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Liang Ma
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yonggao Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Pengcheng Lian
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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31
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Koley S, Panja SK, Soni S, Singh MS. Catalyst-Free One-Pot Access to Pyrazoles and Disulfide-Tethered Pyrazoles via Deamidative Heteroannulation of β-Ketodithioesters with Semicarbazide Hydrochloride in Water. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701595] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Suvajit Koley
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi 221005 India
| | - Sumit Kumar Panja
- Inorganic and Physical Chemistry Department; Indian Institute of Science; Bengaluru 560012 India
| | - Sonam Soni
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi 221005 India
| | - Maya Shankar Singh
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi 221005 India
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32
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Prieto A, Bouyssi D, Monteiro N. Radical-Mediated Formal C(sp2
)-H Functionalization of Aldehyde-Derived N
,N
-Dialkylhydrazones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701600] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Alexis Prieto
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Univ Lyon; Université Claude Bernard Lyon 1; 69622 Villeurbanne France
| | - Didier Bouyssi
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Univ Lyon; Université Claude Bernard Lyon 1; 69622 Villeurbanne France
| | - Nuno Monteiro
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Univ Lyon; Université Claude Bernard Lyon 1; 69622 Villeurbanne France
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33
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Xu P, Li W, Xie J, Zhu C. Exploration of C-H Transformations of Aldehyde Hydrazones: Radical Strategies and Beyond. Acc Chem Res 2018; 51:484-495. [PMID: 29359909 DOI: 10.1021/acs.accounts.7b00565] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The chemistry of hydrazones has gained great momentum due to their involvement throughout the evolution of organic synthesis. Herein, we discuss the tremendous developments in both the methodology and application of hydrazones. Hydrazones can be recognized not only as synthetic equivalents to aldehydes and ketones but also as versatile synthetic building blocks. Consequently, they can participate in a range of practical synthetic transformations. Furthermore, hydrazone derivatives display a broad array of biological activities and have been widely applied as pharmaceuticals. Owing to the weak directing group effect of simple aldehydes and ketones in C-H bond functionalizations, the C-H bond functionalizations of hydrazones that have been developed in the past five years represent a significant step forward. These novel transformations open a new door to a broader library of functionalized and complex small molecules. Moreover, a wide range of biologically important N-heterocycles (dihydropyrazoles, pyrazoles, indazoles, cinnolines, etc.) can be efficiently synthesized in an atom- and step-economical manner through single, double, or triple C-H bond functionalizations of hydrazones. Both radical C-H functionalizations and transition-metal-catalyzed directing-group strategies have enhanced the synthetic utility of hydrazones in the chemical community because these strategies solve the long-standing challenge of C-H functionalizations adjacent to aldehydes and ketones. We began this study based on our ongoing interest in visible-light photoredox catalysis. Visible-light photoredox catalysis has become a powerful tool in contemporary synthetic chemistry due to its remarkable advantages in sustainability and use of radical chemistry. By exploiting a photoredox-catalyzed aminyl radical polar crossover (ARPC) strategy, we successfully achieved visible-light-induced C(sp2)-H difluoroalkylation, trifluoromethylation, and perfluoroalkylation of aldehyde-derived hydrazones. This intriguing result was later applied in the C(sp2)-H amination of hydrazones and a cascade cyclization reaction for the synthesis of polycyclic compounds. Encouraged by this redox-neutral C-H functionalization of aldehyde hydrazones, we extended the oxidative C-H/P-H cross-coupling method, which represents a novel and efficient method for the synthesis of α-iminophosphine oxides. Furthermore, an elegant [3 + 2] cycloaddition of azides and aldehyde hydrazones for the synthesis of functionalized tetrazoles was advantageously developed during our investigation of the oxidative C(sp2)-H azidation of aldehyde hydrazones with TMSN3. The sequential C(sp2)-H/C(sp3)-H bond functionalization of aldehyde-derived hydrazones with simple 2,2-dibromo-1,3-dicarbonyls was achieved by employing relay photoredox catalysis, and it provides a novel method of accessing bioactive fused dihydropyrazole derivatives. The notable feature of this approach was further reflected in the formal [4 + 1] annulation of aldehyde-derived N-tetrahydroisoquinoline hydrazones with 2-bromo-1,3-dicarbonyls. To complement these radical C-H functionalization strategies, we recently applied a directing-group strategy in the Rh-catalyzed C(aldehyde)-H functionalization of aldehyde-derived hydrazones for the synthesis of distinctive and bioactive 1H-indazole scaffolds. In summary, this Account presents recent contributions to the exploration, development, mechanistic insights, and synthetic applications of C-H bond functionalizations of aldehyde hydrazones.
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Affiliation(s)
- Pan Xu
- State
Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of
Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Weipeng Li
- State
Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of
Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Jin Xie
- State
Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of
Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Chengjian Zhu
- State
Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of
Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
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34
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Remy R, Bochet CG. Application of Photoclick Chemistry for the Synthesis of Pyrazoles via 1,3-Dipolar Cycloaddition between Alkynes and Nitrilimines Generated In Situ. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701225] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Richard Remy
- Department of Chemistry; University of Fribourg; Chemin du Musée 9 CH-1700 Fribourg Switzerland
| | - Christian G. Bochet
- Department of Chemistry; University of Fribourg; Chemin du Musée 9 CH-1700 Fribourg Switzerland
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35
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Venkateswarlu V, Kour J, Kumar KAA, Verma PK, Reddy GL, Hussain Y, Tabassum A, Balgotra S, Gupta S, Hudwekar AD, Vishwakarma RA, Sawant SD. Direct N-heterocyclization of hydrazines to access styrylated pyrazoles: synthesis of 1,3,5-trisubstituted pyrazoles and dihydropyrazoles. RSC Adv 2018; 8:26523-26527. [PMID: 35541044 PMCID: PMC9083136 DOI: 10.1039/c8ra04550j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 07/02/2018] [Indexed: 11/21/2022] Open
Abstract
A microwave-assisted method has been developed for the synthesis of tri-substituted pyrazoles via direct N-heterocyclization of hydrazines with metal-acetylacetonate and -dibenzylideneacetonate without using any base or additives. Most importantly, the synthesis of 1-aryl-5-phenyl-3-styryl-1H-pyrazoles was achieved in a single step using hydrochloride salt of various phenylhydrazines and this is the first report for direct construction of these molecules. The reaction medium and microwave conditions play a critical role for their selective product formation during the reaction. The present reaction explored the usage of metal-diketonic complexes as reaction substrates providing acetylacetone and dibenzylideneacetone moieties to directly participate in cyclization with hydrazines to form the corresponding pyrazoles in excellent yields. The present protocol introduces the important N-heterocyclic moieties in the final structures, giving the reaction great applications from a medicinal chemistry perspective, particularly in the late stage modification strategies in drug discovery. The synthesis of tri-substituted pyrazoles was achieved via direct N-heterocyclization of hydrazines with metal-acetylacetonate and -dibenzylideneacetonate without using any base or additives under microwave irradiation in a single step.![]()
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36
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Xu X, Zhang J, Xia H, Wu J. C(sp2)–H functionalization of aldehyde-derived hydrazones via a radical process. Org Biomol Chem 2018; 16:1227-1241. [DOI: 10.1039/c8ob00056e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review is focused on the recent advances in the C(sp2)–H functionalization of aldehyde-derived hydrazones via a radical process. Diverse substituted hydrazones including N-heterocycles are afforded under mild conditions with excellent selectivities. In general, an aminyl radical as the key intermediate is involved during the reaction process.
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Affiliation(s)
- Xiaoyan Xu
- Department of Biochemistry and Molecular Biology
- Zhejiang University School of Medicine
- Hangzhou 310058
- China
| | - Jun Zhang
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Hongguang Xia
- Department of Biochemistry and Molecular Biology
- Zhejiang University School of Medicine
- Hangzhou 310058
- China
| | - Jie Wu
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
- State Key Laboratory of Organometallic Chemistry
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37
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Shao A, Luo X, Chiang CW, Gao M, Lei A. Furans Accessed through Visible-Light-Mediated Oxidative [3+2] Cycloaddition of Enols and Alkynes. Chemistry 2017; 23:17874-17878. [DOI: 10.1002/chem.201704519] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Indexed: 01/07/2023]
Affiliation(s)
- Ailong Shao
- The Institute for Advanced Studies (IAS); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan 430072 Hubei P.R. China
| | - Xu Luo
- The Institute for Advanced Studies (IAS); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan 430072 Hubei P.R. China
| | - Chien-Wei Chiang
- The Institute for Advanced Studies (IAS); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan 430072 Hubei P.R. China
| | - Meng Gao
- National Research Center for Carbohydrate Synthesis; Jiangxi Normal University; Nanchang 330022 Jiangxi P.R. China
| | - Aiwen Lei
- The Institute for Advanced Studies (IAS); College of Chemistry and Molecular Sciences; Wuhan University; Wuhan 430072 Hubei P.R. China
- National Research Center for Carbohydrate Synthesis; Jiangxi Normal University; Nanchang 330022 Jiangxi P.R. China
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38
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Tian M, Shi X, Zhang X, Fan X. Synthesis of 4-Acylpyrazoles from Saturated Ketones and Hydrazones Featured with Multiple C(sp3)–H Bond Functionalization and C–C Bond Cleavage and Reorganization. J Org Chem 2017. [DOI: 10.1021/acs.joc.7b01013] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miaomiao Tian
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic
Functional Molecule and Drug Innovation, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xiaonan Shi
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic
Functional Molecule and Drug Innovation, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xinying Zhang
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic
Functional Molecule and Drug Innovation, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuesen Fan
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic
Functional Molecule and Drug Innovation, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
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39
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Hockstedler AN, Edjah BA, Azhar SZ, Mendoza H, Brown NA, Arrowood HB, Clay AC, Shah AB, Duffek GM, Cui J, Baumstark AL. 13C NMR spectroscopy of heterocycles: 1-phenyl-3-aryl/t-butyl-5-arylpyrazoles. HETEROCYCL COMMUN 2017. [DOI: 10.1515/hc-2017-0034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractA series of chalcones 1–12 were converted to pyrazolines (1Pi–12Pi) by reaction with phenylhydrazine followed by DDQ oxidation to produce the corresponding pyrazoles (1Pz–12Pz). Three 1-phenyl-3-t-butyl-5-arylpyrazoles (13Pz–15Pz) were synthesized using an analogous approach. Molecular modeling studies predicted the 5-aryl group of the pyrazoles for both series to have a torsion angle of 52°–54° whereas the 1-phenyl group was predicted to have 35°–37° torsion angles. The 3-aryl group was predicted to be essentially coplanar (−3°) with the pyrazole system in the first series. 13C NMR data for both series, 1Pz–12Pz and 13Pz–15Pz, were collected in DMSO-d6 at 50°C. A plot of the C4 chemical shifts for 1Pz–12Pz versus Hammet constants for 5-aryl substituents yielded a very good linear correlation (R2=0.96) with a slope of 1.5. The chemical shift data for C4 showed little or no dependence on 3-aryl substituents. The result for 13Pz–15Pz, despite only three points, was consistent with the first series results and yielded a ρ value of 2.0. Distal transmission of substituent effects (5-aryl groups) to C4 of the pyrazole system was reduced by roughly 50–60% of that of the analogous planar isoxazole system, but are not consistent with results for the similarly twisted 4-bromoisoxazoles.
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Affiliation(s)
- Amy N. Hockstedler
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Beatrice A. Edjah
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Saajid Z. Azhar
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Hadrian Mendoza
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Nicole A. Brown
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Hayley B. Arrowood
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Andrew C. Clay
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Anand B. Shah
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Glenda M. Duffek
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Jianmei Cui
- 1Department of Chemistry, Georgia State University, Atlanta, GA 30302-4098, USA
| | - Alfons L. Baumstark
- 2Department of Chemistry, Center for Biotech and Drug Design, Georgia State University, Atlanta, GA 30302-4098, USA
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40
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Affiliation(s)
- Kai Luo
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
- College of Plant ProtectionNanjing Agricultural University Nanjing 210095 P. R. China
| | - Wen‐Chao Yang
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
- College of Plant ProtectionNanjing Agricultural University Nanjing 210095 P. R. China
| | - Lei Wu
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
- Beijing National Laboratory for Molecular Sciences and Institute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
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41
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Yu JM, Lu GP, Cai C. Photocatalytic radical cyclization of α-halo hydrazones with β-ketocarbonyls: facile access to substituted dihydropyrazoles. Chem Commun (Camb) 2017; 53:5342-5345. [DOI: 10.1039/c7cc01470h] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A mild and efficient method for the photocatalytic radical cyclization of α-halo hydrazones with β-ketocarbonyls has been described.
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Affiliation(s)
- Jing-miao Yu
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Guo-Ping Lu
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
| | - Chun Cai
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing
- People's Republic of China
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42
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Wu Z, Xu P, Zhou N, Duan Y, Zhang M, Zhu C. [3+2] Cycloaddition of azide with aldehyde hydrazone through an aminyl radical-polar crossover strategy. Chem Commun (Camb) 2017; 53:1045-1047. [DOI: 10.1039/c6cc08779e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A novel approach to obtain functionalized tetrazoles through an aminyl radical-power crossover strategy is reported.
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Affiliation(s)
- Zhongkai Wu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Pan Xu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Nengneng Zhou
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Yingqian Duan
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Muliang Zhang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Chengjian Zhu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
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43
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Zhang BH, Lei LS, Liu SZ, Mou XQ, Liu WT, Wang SH, Wang J, Bao W, Zhang K. Zinc-promoted cyclization of tosylhydrazones and 2-(dimethylamino)malononitrile: an efficient strategy for the synthesis of substituted 1-tosyl-1H-pyrazoles. Chem Commun (Camb) 2017; 53:8545-8548. [DOI: 10.1039/c7cc04610c] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient strategy for the synthesis of substituted 1-tosyl-1H-pyrazoles has been developed through a cyclization reaction of tosylhydrazones with 2-(dimethylamino)malononitrile.
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Affiliation(s)
- Bang-Hong Zhang
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Lin-Sheng Lei
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Si-Zhan Liu
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xue-Qing Mou
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Wei-Ting Liu
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Shao-Hua Wang
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
- School of Chemical and Environmental Engineering
| | - Jie Wang
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Wen Bao
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Kun Zhang
- School of Chemical and Environmental Engineering
- Wuyi University
- Jiangmen 529020
- P. R. China
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