1
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Betcke I, Götzinger AC, Kornet MM, Müller TJJ. Multicomponent syntheses of pyrazoles via (3 + 2)-cyclocondensation and (3 + 2)-cycloaddition key steps. Beilstein J Org Chem 2024; 20:2024-2077. [PMID: 39161713 PMCID: PMC11331544 DOI: 10.3762/bjoc.20.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Accepted: 07/19/2024] [Indexed: 08/21/2024] Open
Abstract
Pyrazoles are rarely found in nature but are traditionally used in the agrochemical and pharmaceutical industries, while other areas of use are also actively developing. However, they have also found numerous other applications. The search for new and efficient syntheses of these heterocycles is therefore highly relevant. The modular concept of multicomponent reactions (MCR) has paved a broad alley to heteroaromatics. The advantages over traditional methods are the broader scope and increased efficiency of these reactions. In particular, traditional multistep syntheses of pyrazoles have considerably been extended by MCR. Progress has been made in the cyclocondensation of 1,3-dielectrophiles that are generated in situ. Limitations in the regioselectivity of cyclocondensation with 1,3-dicarbonyls were overcome by the addition-cyclocondensation of α,β-unsaturated ketones. Embedding 1,3-dipolar cycloadditions into a one-pot process has additionally been developed for concise syntheses of pyrazoles. The MCR strategy also allows for concatenating classical condensation-based methodology with modern cross-coupling and radical chemistry, as well as providing versatile synthetic approaches to pyrazoles. This overview summarizes the most important MCR syntheses of pyrazoles based on ring-forming sequences in a flashlight fashion.
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Affiliation(s)
- Ignaz Betcke
- Heinrich-Heine-Universität Düsseldorf, Math.-Nat. Fakultät, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
| | - Alissa C Götzinger
- Heinrich-Heine-Universität Düsseldorf, Math.-Nat. Fakultät, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
| | - Maryna M Kornet
- Heinrich-Heine-Universität Düsseldorf, Math.-Nat. Fakultät, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
- Zaporizhzhia National University, Faculty of Biology, Department of Chemistry, Zhukovskogo Street 66, 69600 Zaporizhzhia, Ukraine
| | - Thomas J J Müller
- Heinrich-Heine-Universität Düsseldorf, Math.-Nat. Fakultät, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
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2
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Pal S, Das D, Bhunia S. p-Toluenesulfonic acid-promoted organic transformations for the generation of molecular complexity. Org Biomol Chem 2024; 22:1527-1579. [PMID: 38275082 DOI: 10.1039/d3ob01766d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
Since the beginning of this century, p-toluenesulfonic acid (p-TSA) catalysed organic transformations have been an active area of research for developing efficient synthetic methodologies. Often, catalysis using p-TSA is associated with many advantages, such as operational simplicity, high selectivity, excellent yields, and ease of product isolation, which make organic synthesis convenient and versatile. Notably, p-TSA is a non-toxic, commercially available, inexpensive solid organic compound that is soluble in water, alcohols, and other polar organic solvents. p-TSA is a strong acid compared to many protic or mineral acids and its high acidity helps activate different organic functional groups. p-TSA-promoted conversions are fast, have a high atom and pot economy, and feature a multiple bond-forming index. Therefore, the utilization of p-TSA enables the synthesis of many important structural scaffolds without any hazardous metals, making it desirable in numerous applications of sustainable and green chemistry. Recently, this emerging area of research has become one of the pillars of synthetic organic chemistry to synthesise biologically relevant, complex carbocycles and heterocycles. This study provides a comprehensive summary of methods, applications, and mechanistic insights into p-TSA-catalysed organic transformations, covering the literature reports that have appeared since 2012.
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Affiliation(s)
- Sanchari Pal
- Department of Chemistry, Triveni Devi Bhalotia College, Raniganj, India.
| | - Debjit Das
- Department of Chemistry, Triveni Devi Bhalotia College, Raniganj, India.
| | - Sabyasachi Bhunia
- Department of Chemistry, Central University of Jharkhand, Ranchi, Jharkhand, India.
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3
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Zou X, Zheng L, Zhuo X, Zhong Y, Wu Y, Yang B, He Q, Guo W. Copper-Promoted Aerobic Oxidative [3+2] Cycloaddition Reactions of N,N-Disubstituted Hydrazines with Alkynoates: Access to Substituted Pyrazoles. J Org Chem 2023; 88:2190-2206. [PMID: 36724037 DOI: 10.1021/acs.joc.2c02610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A copper-promoted aerobic oxidative [3+2] cycloaddition reaction for the synthesis of various substituted pyrazoles from N,N-disubstituted hydrazines with alkynoates in the presence of bases is developed. This work involves a direct C(sp3)-H functionalization and the formation of new C-C/C-N bonds. In this strategy, inexpensive and easily available Cu2O serves as the promoter and air acts as the green oxidant. The reaction exhibits the advantages of high atom and step economy, high regioselectivity, and easy operation.
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Affiliation(s)
- Xiaoying Zou
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xiaoya Zhuo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yumei Zhong
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yingying Wu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Beining Yang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Qifang He
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
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4
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He J, Liu Y, Feng Y, Li X, Liu P, Dai B. Cs 2CO 3-Promoted [3 + 2] Cyclization of Chalcone and N-Tosylhydrazone. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2078845] [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)
- Jing He
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, China
| | - Yali Liu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, China
| | - Yijiao Feng
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, China
| | - Xuezhen Li
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, China
| | - Ping Liu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, China
| | - Bin Dai
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, China
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5
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Li MM, Huang H, Tian W, Pu Y, Zhang C, Yang J, Ren Q, Tao F, Deng Y, Lu J. Construction of multi-substituted pyrazoles via potassium carbonate-mediated [3 + 2] cycloaddition of in situ generated nitrile imines with cinnamic aldehydes. RSC Adv 2022; 12:13087-13092. [PMID: 35497007 PMCID: PMC9052213 DOI: 10.1039/d2ra00331g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 04/25/2022] [Indexed: 11/21/2022] Open
Abstract
A highly efficient potassium carbonate-mediated [3 + 2] cycloaddition reaction of hydrazonoyl chlorides with cinnamic aldehydes to furnish multi-substituted pyrazoles under nontoxic and mild conditions has been developed. A plausible stepwise cycloaddition reaction mechanism is proposed. This protocol featured broad substrate coverage, good functional group tolerance, wide scalability, and operational simplicity, as well as conveniently constructed pyrazole scaffolds.
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Affiliation(s)
- Mei-Mei Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Hui Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Wanrong Tian
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Yiru Pu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Chaozheng Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Jirui Yang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Qing Ren
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong Hong Kong SAR 999077 China
| | - Feiyan Tao
- Research and Development Centre, China Tobacco Sichuan Industrial Co., Ltd Chengdu 610066 China
| | - Yun Deng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China
| | - Jun Lu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 China .,Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University Hong Kong SAR 999077 China
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6
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Khan RI, Pitchumani K. Quinolinium modified β-cyclodextrin: An ionic ligand towards sustainable A3-coupling and tandem cyclisation reactions of aldehydes, amines and alkynes. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Wang Q, Hong G, Tang Z, Yang P, Zhong Y, Gong Y, Wang L. Divergent Synthesis of 3,5‐disubstituted Pyrazoles and α, β‐alkynic hydrazone from Diarylpropynones and Carbazates. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100794] [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]
Affiliation(s)
- Qi Wang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Gang Hong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Zhicong Tang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Peng Yang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Yi Zhong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Yu Gong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Limin Wang
- East China University of Science and Technology School of Chemical and Molecular Engineering 130 Meilong Road 200237 Shanghai CHINA
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8
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Guo H, Tian L, Liu Y, Wan JP. DMSO as a C 1 Source for [2 + 2 + 1] Pyrazole Ring Construction via Metal-Free Annulation with Enaminones and Hydrazines. Org Lett 2021; 24:228-233. [PMID: 34908420 DOI: 10.1021/acs.orglett.1c03879] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A cascade reaction between enaminones, hydrazines, and dimethyl sulfoxide (DMSO) for the synthesis of 1,4-disubstituted pyrazoles catalyzed by molecular iodine in the presence of Selectfluor has been realized. DMSO plays a dual role as the C1 source and the reaction medium. In addition, the synthesis of 1,3,4-trisubstituted pyrazoles using aldehydes as alternative C1 building blocks has also been achieved.
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Affiliation(s)
- Haijin Guo
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Lihong Tian
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
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9
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Ali El-Remaily MAEAA, El-Dabea T, Alsawat M, Mahmoud MHH, Alfi AA, El-Metwaly N, Abu-Dief AM. Development of New Thiazole Complexes as Powerful Catalysts for Synthesis of Pyrazole-4-Carbonitrile Derivatives under Ultrasonic Irradiation Condition Supported by DFT Studies. ACS OMEGA 2021; 6:21071-21086. [PMID: 34423215 PMCID: PMC8375103 DOI: 10.1021/acsomega.1c02811] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 07/23/2021] [Indexed: 05/17/2023]
Abstract
In this study, we are interested in preparing Fe(III), Pd(II), and Cu(II) complexes from new thiazole derivatives. All syntheses were elaborately elucidated to estimate their molecular and structural formulae, which agreed with those of mononuclear complexes. The square-planer geometry of Pd(II) complex (MATYPd) was the starting point for its use as a heterocatalyst in preparing pyrazole-4-carbonitrile derivatives 4a-o using ultrasonic irradiation through a facile one-pot reaction. The simple operation, short-time reaction (20 min), and high efficiency (97%) were the special advantages of this protocol. Furthermore, this green synthesis strategy was advanced by examination of the reusability of the catalyst in four consecutive cycles without significant loss of catalytic activity. The new synthesis strategy presented remarkable advantages in terms of safety, simplicity, stability, mild conditions, short reaction time, excellent yields, and use of a H2O solvent. This catalytic protocol was confirmed by the density functional theory (DFT) study, which reflected the specific characteristics of such a complex. Logical mechanisms have been suggested for the successfully exerted essential physical parameters that confirmed the superiority of the Pd(II) complex in the catalytic role. Optical band gap, electrophilicity, and electronegativity features, which are essential parameters for the catalytic behavior of the Pd(II) complex, are based mainly on the unsaturated valence shell of Pd(II).
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Affiliation(s)
| | - Tarek El-Dabea
- Department
of Chemistry, Faculty of Science, Sohag
University, 82524 Sohag, Egypt
| | - Mohammed Alsawat
- Department
of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Mohamed H. H. Mahmoud
- Department
of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Alia Abdulaziz Alfi
- Department
of Chemistry, Faculty of Applied Science, Umm Al-Qura University, 715, Makkah, Saudi Arabia
| | - Nashwa El-Metwaly
- Department
of Chemistry, Faculty of Applied Science, Umm Al-Qura University, 715, Makkah, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Mansoura
University, 35516, Mansoura, Egypt
| | - Ahmed M. Abu-Dief
- Department
of Chemistry, Faculty of Science, Sohag
University, 82524 Sohag, Egypt
- Department
of Chemistry, College of Science, Taibah
University, P.O. Box 344, 344, Madinah, Saudi Arabia
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10
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Cui X, Ma J, Zeng T, Xu J, Li Y, Wang X. Metal-free cascade synthesis of unsymmetrical 2-aminopyrimidines from imidazolate enaminones. RSC Adv 2021; 11:24247-24253. [PMID: 35479033 PMCID: PMC9036825 DOI: 10.1039/d1ra04319f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 07/05/2021] [Indexed: 01/25/2023] Open
Abstract
A convenient metal-free synthesis of unsymmetrical 2-aminopyrimidines from imidazolate enaminones has been developed. In this procedure, various structural 2-aminopyrimidines, as well as 4,5-dihydroisoxazol-5-ols and pyrazoles were synthesized in moderate to excellent yields. A plausible mechanism was also proposed for the cascade reaction. This method represents an effective strategy towards the synthesis of unsymmetrical 2-aminopyrimidines. A convenient metal-free synthesis of unsymmetrical 2-aminopyrimidines from imidazolate enaminones has been developed.![]()
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Affiliation(s)
- Xue Cui
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Hainan Medical University Haikou 571199 P. R. China
| | - Jianting Ma
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Hainan Medical University Haikou 571199 P. R. China
| | - Tingting Zeng
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Hainan Medical University Haikou 571199 P. R. China
| | - Junyu Xu
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Hainan Medical University Haikou 571199 P. R. China
| | - Youbin Li
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Hainan Medical University Haikou 571199 P. R. China
| | - Xuesong Wang
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, Haikou Key Laboratory of Li Nationality Medicine, School of Pharmacy, Hainan Medical University Haikou 571199 P. R. China
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11
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Lignin-Phenylhydrazone as a Corrosion Inhibitor of API X52 Carbon Steel in 3.5% NaCl and 0.1 mol/L HCl Medium. Chem Res Chin Univ 2021. [DOI: 10.1007/s40242-021-0334-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Volkova Y, Baranin S, Zavarzin I. A
3
Coupling Reaction in the Synthesis of Heterocyclic Compounds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000866] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Yulia Volkova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. Moscow 119991
| | - Sergey Baranin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. Moscow 119991
| | - Igor Zavarzin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. Moscow 119991
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13
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Sharma S, Singh V. Exploration of pyrazole based
aldo‐x
bifunctional building blocks for the synthesis of pyrazole annulated molecular architectures. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Shubham Sharma
- Department of Chemistry Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar India
| | - Virender Singh
- Department of Chemistry Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar India
- Department of Chemistry Central University of Punjab Bathinda India
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14
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Li Y, Wan J, Liu Y. Annulation of Ketene Dithioacetals and Sulfonyl Hydrazines for the Synthesis of
N
‐Sulfonyl 5‐Alkylthiopyrazoles. ChemistrySelect 2020. [DOI: 10.1002/slct.202002480] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Yi Li
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang 330022 P. R. China
| | - Jie‐Ping Wan
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang 330022 P. R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang 330022 P. R. China
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15
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Neto JSS, Zeni G. Alkynes and Nitrogen Compounds: Useful Substrates for the Synthesis of Pyrazoles. Chemistry 2020; 26:8175-8189. [PMID: 31990413 DOI: 10.1002/chem.201905276] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/24/2020] [Indexed: 02/06/2023]
Abstract
The easy preparation and functionalization of pyrazoles associated with their innumerable biological properties have made this class of N-heterocycles very attractive for the development of new synthetic routes and applications. The cyclization reactions of alkynes and nitrogen compounds represent a powerful tool for the preparation of pyrazoles. This Review covers the recent advances in the preparation of pyrazoles by reacting alkynes and nitrogen compounds under transition-metal-catalyzed or metal-free conditions.
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Affiliation(s)
- Jose S S Neto
- Department of Biochemistry and Molecular Biology Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios, CCNE, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
| | - Gilson Zeni
- Department of Biochemistry and Molecular Biology Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios, CCNE, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
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16
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Pathan SI, Chundawat NS, Chauhan NPS, Singh GP. A review on synthetic approaches of heterocycles via insertion-cyclization reaction. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1712609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | | | | | - Girdhar Pal Singh
- Department of Chemistry, Bhupal Nobles’ University, Udaipur, Rajasthan, India
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17
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Bhatia R, Kadyan K, Duhan M, Devi M, Singh R, Kamboj RC, Kumar P. A Serendipitous Synthesis: SiO2‐HNO3Mediated Oxidative Aromatization and Regioselective Nitration of 1,3,5‐Trisubstituted‐4,5‐Dihydro‐1H‐Pyrazoles. ChemistrySelect 2019. [DOI: 10.1002/slct.201902285] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Rimpy Bhatia
- Department of ChemistryKurukshetra University Kurukshetra- 136119 Haryana
| | - Kulbir Kadyan
- Department of ChemistryKurukshetra University Kurukshetra- 136119 Haryana
| | - Meenakshi Duhan
- Department of ChemistryKurukshetra University Kurukshetra- 136119 Haryana
| | - Meena Devi
- Department of ChemistryKurukshetra University Kurukshetra- 136119 Haryana
| | - Rahul Singh
- Department of ChemistryKurukshetra University Kurukshetra- 136119 Haryana
| | - Ramesh C. Kamboj
- Department of ChemistryKurukshetra University Kurukshetra- 136119 Haryana
| | - Parvin Kumar
- Department of ChemistryKurukshetra University Kurukshetra- 136119 Haryana
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18
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Zhang G, Fan Q, Zhao Y, Ding C. Copper-Promoted Oxidative Intramolecular C-H Amination of Hydrazones to Synthesize 1H
-Indazoles and 1H
-Pyrazoles Using a Cleavable Directing Group. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900947] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Guofu Zhang
- College of Chemical Engineering; Zhejiang University of Technology; 310014 Hangzhou P. R. China
| | - Qiankun Fan
- College of Chemical Engineering; Zhejiang University of Technology; 310014 Hangzhou P. R. China
| | - Yiyong Zhao
- College of Chemical Engineering; Zhejiang University of Technology; 310014 Hangzhou P. R. China
| | - Chengrong Ding
- College of Chemical Engineering; Zhejiang University of Technology; 310014 Hangzhou P. R. China
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19
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Elnagdy HMF, Sarma D. FeCl 3
/PVP as Green Homogeneous Catalyst to Synthesize 5-Amino-1 H
-Pyrazole-4-Carbonitriles from Malononitrile Derivatives. ChemistrySelect 2019. [DOI: 10.1002/slct.201802919] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Hanan M. F. Elnagdy
- Department of Chemistry; Dibrugarh University; Dibrugarh 786004, Assam India
| | - Diganta Sarma
- Department of Chemistry; Dibrugarh University; Dibrugarh 786004, Assam India
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20
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Krishnammagari SK, Lim KT, Cho BG, Tae Jeong Y. Choline hydroxide: An efficient and biodegradable catalyst for the synthesis of 2-amino-3-nitro-4 H-chromene derivatives in an aqueous medium. PHOSPHORUS SULFUR 2018. [DOI: 10.1080/10426507.2018.1469489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | - Kwon Taek Lim
- Department of Image Science and Engineering, Pukyong National University, Busan, Republic of Korea
| | - Byung Gwon Cho
- Department of Image Science and Engineering, Pukyong National University, Busan, Republic of Korea
| | - Yeon Tae Jeong
- Department of Image Science and Engineering, Pukyong National University, Busan, Republic of Korea
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21
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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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22
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Devi N, Shankar R, Singh V. 4-Formyl-Pyrazole-3-Carboxylate: A Useful Aldo-X Bifunctional Precursor for the Syntheses of Pyrazole-fused/Substituted Frameworks. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.3045] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Nisha Devi
- Department of Chemistry; Dr B R Ambedkar National Institute of Technology; Jalandhar 144011 India
| | - Ravi Shankar
- Bio-Organic Chemistry Division; CSIR - Indian Institute of Integrative Medicine; Jammu 180001 India
| | - Virender Singh
- Department of Chemistry; Dr B R Ambedkar National Institute of Technology; Jalandhar 144011 India
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23
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Xu YL, Teng QH, Tong W, Wang HS, Pan YM, Ma XL. Atom-Economic Synthesis of 4-Pyrones from Diynones and Water. Molecules 2017; 22:E109. [PMID: 28075414 PMCID: PMC6155647 DOI: 10.3390/molecules22010109] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 01/05/2017] [Accepted: 01/05/2017] [Indexed: 12/31/2022] Open
Abstract
Transition-metal-free synthesis of 4-pyrones via TfOH-promoted nucleophilic addition/cyclization of diynones and water has been developed. This transformation is simple, atom economical and environmentally benign, providing rapid and efficient access to substituted 4-pyrones.
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Affiliation(s)
- Yan-Li Xu
- College of Pharmacy, Guilin Medical University, Guilin 541004, China.
| | - Qing-Hu Teng
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China.
| | - Wei Tong
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China.
| | - Heng-Shan Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China.
| | - Ying-Ming Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China.
| | - Xian-Li Ma
- College of Pharmacy, Guilin Medical University, Guilin 541004, China.
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24
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Sathishkannan G, Tamilarasan VJ, Srinivasan K. Nucleophilic ring-opening reactions of trans-2-aroyl-3-aryl-cyclopropane-1,1-dicarboxylates with hydrazines. Org Biomol Chem 2017; 15:1400-1406. [DOI: 10.1039/c6ob02552h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
trans-2-Aroyl-3-aryl-cyclopropane-1,1-dicarboxylates gave dihydropyrazoles when treated with arylhydrazines in refluxing EtOH, whereas they afforded cyclopropane-fused pyridazinones upon treatment with hydrazines in refluxing AcOH.
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25
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He Y, Wang YC, Hu K, Xu XL, Wang HS, Pan YM. Palladium-Catalyzed Synthesis of 5-Iminopyrrolones through Isocyanide Double Insertion Reaction with Terminal Alkynes and Water. J Org Chem 2016; 81:11813-11818. [PMID: 27805820 DOI: 10.1021/acs.joc.6b02288] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the combination of Pd(dppf)Cl2 and Cu(OAc)2, a variety of 5-iminopyrrolones were synthesized in moderate to good yields from terminal alkynes, isocyanide, and water via isocyanide double insertion and cycloaddition reaction. A plausible reaction mechanism for this process is depicted. Furthermore, selected compounds 3c, 3e, and 3h exhibited good activities against HepG2 (human liver cancer), NCI-H460 (human lung cancer), and SK-OV-3 (human ovarian cancer) cell lines with IC50 values in the range of 10.63-22.63 μmol L-1.
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Affiliation(s)
- Yan He
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University , Guilin 541004, People's Republic of China
| | - Ying-Chun Wang
- College of Chemistry and Chemical Engineering, Jishou University , Jishou 416000, People's Republic of China
| | - Kun Hu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University , Guilin 541004, People's Republic of China
| | - Xiao-Ling Xu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University , Guilin 541004, People's Republic of China
| | - Heng-Shan Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University , Guilin 541004, People's Republic of China
| | - Ying-Ming Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University , Guilin 541004, People's Republic of China
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26
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Fan XW, Lei T, Zhou C, Meng QY, Chen B, Tung CH, Wu LZ. Radical Addition of Hydrazones by α-Bromo Ketones To Prepare 1,3,5-Trisubstituted Pyrazoles via Visible Light Catalysis. J Org Chem 2016; 81:7127-33. [PMID: 27362866 DOI: 10.1021/acs.joc.6b00992] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel efficient tandem reaction of hydrazones and α-bromo ketones is reported for the preparation of 1,3,5-trisubstituted pyrazoles by visible light catalysis. In this system, the monosubstituted hydrazones show wonderful reaction activity with alkyl radicals, generated from α-bromo ketones. A radical addition followed by intramolecular cyclization affords the important pyrazole skeleton in good to excellent yields. This efficient strategy under mild conditions with wide group tolerance provides a potential approach to the 1,3,5-trisubstituted pyrazoles.
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Affiliation(s)
- Xiu-Wei Fan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Tao Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Chao Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Qing-Yuan Meng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, P. R. China
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27
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Domino synthesis of fused pyrazolo[5,1- b ]quinazolin-9(1 H )-ones catalyzed by CuI via subsequent Michael addition and elimination. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.09.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Transition metal-free one-pot synthesis of nitrogen-containing heterocycles. Mol Divers 2015; 20:185-232. [DOI: 10.1007/s11030-015-9596-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 04/02/2015] [Indexed: 01/22/2023]
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29
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Maddila S, Rana S, Pagadala R, Kankala S, Maddila S, Jonnalagadda SB. Synthesis of pyrazole-4-carbonitrile derivatives in aqueous media with CuO/ZrO2 as recyclable catalyst. CATAL COMMUN 2015. [DOI: 10.1016/j.catcom.2014.12.005] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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30
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Mantovani AC, Goulart TAC, Back DF, Zeni G. Synthesis of pyridazinones through the copper(I)-catalyzed multicomponent reaction of aldehydes, hydrazines, and alkynylesters. Chemistry 2014; 20:12663-8. [PMID: 25124722 DOI: 10.1002/chem.201403873] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Indexed: 11/08/2022]
Abstract
The copper-catalyzed multicomponent cyclization reaction, which combined aldehydes, hydrazines, and alkynylesters, was applied in the synthesis of pyridazinones. The reaction was regioselective and gave only six-membered pyridazinones in the complete absence of five-membered pyrazoles or a regioisomeric mixture. During this investigation, the use of 2-halobenzaldehyde as the starting material, under identical reaction conditions, gave 6-(2-ethoxyphenyl)pyridazinones after sequential Michael addition/1,2-addition/Ullmann cross-coupling reactions.
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Affiliation(s)
- Anderson C Mantovani
- Departamento de Química Orgânica Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, 97105-900 (Brazil)
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31
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Chen DS, Zhang MM, Li YL, Liu Y, Wang XS. Copper(I)-catalyzed synthesis of 1-arylpyrazolo[5,1-b]quinazolin-9(1H)-one via intramolecular alkyne hydroamination. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.048] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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32
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Reddy MV, Oh J, Jeong YT. p-Toluenesulfonic acid-catalyzed one-pot synthesis of 2-amino-4-substituted-1,4-dihydrobenzo[4,5]imidazolo[1,2-a]pyrimidine-3-carbonitriles under neat conditions. CR CHIM 2014. [DOI: 10.1016/j.crci.2013.08.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Harigae R, Moriyama K, Togo H. Preparation of 3,5-disubstituted pyrazoles and isoxazoles from terminal alkynes, aldehydes, hydrazines, and hydroxylamine. J Org Chem 2014; 79:2049-58. [PMID: 24512630 DOI: 10.1021/jo4027116] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The reaction of terminal alkynes with n-BuLi, and then with aldehydes, followed by the treatment with molecular iodine, and subsequently hydrazines or hydroxylamine provided the corresponding 3,5-disubstituted pyrazoles or isoxazoles in good yields with high regioselectivity, through the formations of propargyl secondary alkoxides and α-alkynyl ketones. The present reactions are one-pot preparation of 3,5-disubstituted pyrazoles from terminal alkynes, aldehydes, molecular iodine, and hydrazines, and 3,5-disubstituted isoxazoles from terminal alkynes, aldehydes, molecular iodine, and hydroxylamine.
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Affiliation(s)
- Ryo Harigae
- Graduate School of Science, Chiba University , Yayoi-cho 1-33, Inage-ku, Chiba 263-8522, Japan
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34
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Liu P, Liu JL, Wang HS, Pan YM, Liang H, Chen ZF. Copper-mediated cross-coupling–cyclization–oxidation: a one-pot reaction to construct polysubstituted pyrroles. Chem Commun (Camb) 2014; 50:4795-8. [DOI: 10.1039/c3cc48728h] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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35
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Rai P, Srivastava M, Singh J, Singh J. Molecular iodine: a green and inclusive catalyst for the synthesis of highly functionalized 1,3,5-trisubstituted pyrazoles in aqueous medium. RSC Adv 2014. [DOI: 10.1039/c3ra44315a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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36
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Kumar A, Maurya S, Gupta MK, Shukla RD. Amphiphile catalysed selective synthesis of 4-amino alkylated-1H-pyrazol-5-ol via Mannich aromatization preferred to the Knoevenagel–Michael type reaction in water. RSC Adv 2014. [DOI: 10.1039/c4ra11961d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An economic and efficient amphiphile (SDS) catalysed one pot synthesis of aromatized 4-amino alkylated-1H-pyrazol-5-ol via a Mannich aromatization preffered to the Knoevenagel–Michael type reaction in water has been developed.
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Affiliation(s)
- Atul Kumar
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow-226031, India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi, India
| | - Shivam Maurya
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow-226031, India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi, India
| | - Maneesh Kumar Gupta
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow-226031, India
| | - Ratnakar Dutt Shukla
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow-226031, India
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37
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Wang X, Li SY, Pan YM, Wang HS, Liang H, Chen ZF, Qin XH. Samarium(III)-Catalyzed C(sp3)–H Bond Activation: Synthesis of Indolizines via C–C and C–N Coupling between 2-Alkylazaarenes and Propargylic Alcohols. Org Lett 2013; 16:580-3. [DOI: 10.1021/ol4034513] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Xu Wang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic of China
| | - Shen-yan Li
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic of China
| | - Ying-ming Pan
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic of China
| | - Heng-shan Wang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic of China
| | - Hong Liang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic of China
| | - Zhen-feng Chen
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic of China
| | - Xiao-huan Qin
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic of China
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38
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ANRORC rearrangement in tetrahydro-2H-chromenones. Synthesis and structural assignment by NMR, MS, X-ray and DFT calculations of 2-[3(5)-trifluoromethyl-1H-pyrazol-4-yl)arylmethyl]cyclohexenones and derivatives. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.03.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Huang GB, Wang X, Pan YM, Wang HS, Yao GY, Zhang Y. Atom-Economical Chemoselective Synthesis of 1,4-Enynes from Terminal Alkenes and Propargylic Alcohols Catalyzed by Cu(OTf)2. J Org Chem 2013; 78:2742-5. [DOI: 10.1021/jo3026803] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guo-Bao Huang
- Key Laboratory for the Chemistry and Molecular
Engineering of Medicinal Resources (Ministry of Education of China),
School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic
of China
| | - Xu Wang
- Key Laboratory for the Chemistry and Molecular
Engineering of Medicinal Resources (Ministry of Education of China),
School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic
of China
| | - Ying-Ming Pan
- Key Laboratory for the Chemistry and Molecular
Engineering of Medicinal Resources (Ministry of Education of China),
School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic
of China
| | - Heng-Shan Wang
- Key Laboratory for the Chemistry and Molecular
Engineering of Medicinal Resources (Ministry of Education of China),
School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic
of China
| | - Gui-Yang Yao
- Key Laboratory for the Chemistry and Molecular
Engineering of Medicinal Resources (Ministry of Education of China),
School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, People’s Republic
of China
| | - Ye Zhang
- Department of
Chemistry, Guilin Normal College, Guangxi
541001, People’s Republic of China
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40
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Zhang T, Bao W. Synthesis of 1H-Indazoles and 1H-Pyrazoles via FeBr3/O2 Mediated Intramolecular C–H Amination. J Org Chem 2013; 78:1317-22. [DOI: 10.1021/jo3026862] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Tianshui Zhang
- Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, P. R. China
| | - Weiliang Bao
- Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, P. R. China
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41
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Srivastava M, Rai P, Singh J, Singh J. An environmentally friendlier approach—ionic liquid catalysed, water promoted and grinding induced synthesis of highly functionalised pyrazole derivatives. RSC Adv 2013. [DOI: 10.1039/c3ra42493f] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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42
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43
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Wu Q, Liu P, Pan YM, Xu YL, Wang HS. Cu(OTf)2-catalyzed three-component annulation reaction: one-pot synthesis of 4,5-dihydropyrazole from aldehydes, hydrazines and alkenes. RSC Adv 2012. [DOI: 10.1039/c2ra21106h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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