1
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Wang S, Xu H, Zhang R, Zhang S, Chai Y, Yang B, Zhao J, Xu Y, Li P. Regioselective Synthesis of N-Vinyl Pyrazoles from Vinyl Sulfonium Salts with Diazo Compounds. Org Lett 2023; 25:6746-6750. [PMID: 37669415 DOI: 10.1021/acs.orglett.3c02653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Herein, we develop a base-promoted regioselective synthesis of N-vinyl pyrazoles from vinyl sulfonium salts with diazo compounds. This metal-free synthetic protocol provides an efficient and practical approach to diverse N-vinyl pyrazoles in good to excellent yields under mild conditions. The reaction appears to experience a [3 + 2] annulation of vinyl sulfonium salts and diazo anions rather than diazo compounds, followed by N-vinylation.
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Affiliation(s)
- Shichong Wang
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China
| | - Huayan Xu
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China
| | - Ruoyu Zhang
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China
| | - Siyu Zhang
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China
| | - Yun Chai
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China
| | - Bingchuan Yang
- College of Chemistry and Chemical Engineering, Qilu Normal University, Jinan, Shandong 250013, P. R. China
| | - Jingjing Zhao
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China
| | - Yuanqing Xu
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China
| | - Pan Li
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P. R. China
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2
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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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3
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Pal CK, Jena AK. Ce-catalyzed regioselective synthesis of pyrazoles from 1,2-diols via tandem oxidation and C-C/C-N bond formation. Org Biomol Chem 2022; 21:59-64. [PMID: 36441186 DOI: 10.1039/d2ob01996e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A novel and efficient cerium-catalyzed tandem oxidation and intermolecular ring cyclization of vicinal diols with hydrazones has been achieved for the regioselective synthesis of pyrazole derivatives. The corresponding 1,3-di- and 1,3,5-trisubstituted pyrazoles were obtained in moderate to excellent yields. The reaction has the advantages of mild conditions, easily available starting materials, broad substrate scope and good functional group tolerance.
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Affiliation(s)
- Chandan Kumar Pal
- Department of Chemistry, Maharaja Sriram Chandra Bhanja Deo University (Erstwhile North Orissa University), Baripada - 757 003, Odisha, India.
| | - Ashis Kumar Jena
- Department of Chemistry, Maharaja Sriram Chandra Bhanja Deo University (Erstwhile North Orissa University), Baripada - 757 003, Odisha, India.
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4
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Ravindar L, Hasbullah SA, Hassan NI, Qin HL. Cross‐Coupling of C‐H and N‐H Bonds: a Hydrogen Evolution Strategy for the Construction of C‐N Bonds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lekkala Ravindar
- Universiti Kebangsaan Malaysia Fakulti Teknologi dan Sains Maklumat Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Siti Aishah Hasbullah
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Nurul Izzaty Hassan
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Hua-Li Qin
- Wuhan University of Technology School of Chemistry 430070 Hubei CHINA
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5
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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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6
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Kurma SH, Kolla ST, Sridhar B, Bhimapaka CR. Ruthenium‐Catalyzed Intermolecular Cyclization and N‐methylation of Salicyl N‐tosylhydrazones. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Siva Hariprasad Kurma
- Indian Institute of Chemical Technology CSIR: Indian Institute of Chemical Technology Department of Organic Synthesis & Process Chemistry INDIA
| | - Sai Teja Kolla
- Indian Institute of Chemical Technology CSIR: Indian Institute of Chemical Technology Department of Organic Synthesis & Process Chemistry INDIA
| | - Balasubramanian Sridhar
- Indian Institute of Chemical Technology CSIR: Indian Institute of Chemical Technology Department of Analytical & Structural Chemistry INDIA
| | - China Raju Bhimapaka
- Indian Institute of Chemical Technology Department of Organic Synthesis & Process Chemistry INDIA
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7
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Chandrasekharan SP, Dhami A, Kumar S, Mohanan K. Recent advances in pyrazole synthesis employing diazo compounds and synthetic analogues. Org Biomol Chem 2022; 20:8787-8817. [DOI: 10.1039/d2ob01918c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review summarizes the recent developments in the construction of pyrazoles using diazo compounds, nitrile imines and their synthetic equivalents.
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Affiliation(s)
- Sanoop P. Chandrasekharan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Anamika Dhami
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Sandeep Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research, Ghaziabad-201002, India
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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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Pati S, Rayi S, Namboothiri INN. Stereoselective Synthesis of Tri- and Tetrasubstituted Olefins via 1,6-Additions of Diazo Compounds and Their Precursors to p-Quinone Methides. ACS ORGANIC & INORGANIC AU 2021; 1:51-59. [PMID: 36855755 PMCID: PMC9954373 DOI: 10.1021/acsorginorgau.1c00012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Reactions of para-quinone methides (p-QMs) with α-diazo-β-ketosulfones and their corresponding esters as well as simple β-dicarbonyl compounds and β-ketosulfones have been carried out under basic conditions. While the reaction of diazosulfone with p-QMs afforded trisubstituted olefins via deacylative 1,6-addition and elimination, α-diazo-β-ketoesters and various active methylene compounds such as 1,3-dicarbonyls and β-ketosulfones afforded tetrasubstituted olefins via 1,6-addition and aerial oxidation. These simple, environmentally benign, and mechanistically diverse protocols provided the products in moderate to excellent yields and selectivities.
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10
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Enantioselective 1,6‐Conjugate Addition of Dialkyl α‐Diazo Methylphosphonate to
para
‐Quinone Methides. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Tian YT, Zhang FG, Ma JA. Regioselective [3 + 2] Cycloaddition Reaction of 3-Alkynoates with Seyferth-Gilbert Reagent. J Org Chem 2021; 86:3574-3582. [PMID: 33507737 DOI: 10.1021/acs.joc.0c02957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A Et3N-triggered regioselective [3 + 2] cycloaddition reaction of 3-alkynoates with Seyferth-Gilbert reagent has been developed to furnish a series of trisubstituted pyrazole-3-phosphonates. A one-pot cycloaddition/alkylation sequence further offered access to the corresponding fully substituted pyrazoles.
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Affiliation(s)
- Yu-Ting Tian
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Centre of Chemical Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, People's Republic of China
| | - Fa-Guang Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Centre of Chemical Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, People's Republic of China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Centre of Chemical Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, People's Republic of China
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12
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Naveen S, Kumara K, Kumar AD, Kumar KA, Zarrouk A, Warad I, Lokanath N. Synthesis, characterization, crystal structure, Hirshfeld surface analysis, antioxidant properties and DFT calculations of a novel pyrazole derivative: Ethyl 1-(2,4-dimethylphenyl)-3-methyl-5-phenyl-1H-pyrazole-4-carboxylate. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129350] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Zhao P, Zeng Z, Feng X, Liu X. Multisubstituted pyrazole synthesis via [3 + 2] cycloaddition/rearrangement/N H insertion cascade reaction of α-diazoesters and ynones. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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Facile synthesis of pyrazoles via [3 + 2] cycloaddition of diazocarbonyl compounds and enones. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152622] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Kommera R, Balasubramanian S, Raju Bhimapaka C. RuCl
3
Catalyzed Reaction of Chromones with Bestmann‐Ohira Reagent for the Construction of 2‐Hydroxybenzoyl‐1
H
‐pyrazolylphosphonates and Dihydrochromeno[3,2‐
c
]pyrazolylphosphonates. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000420] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Rajkumar Kommera
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Sridhar Balasubramanian
- Department of Analytical & Structural Chemistry CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - China Raju Bhimapaka
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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16
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Jamali MF, Vaishanv NK, Mohanan K. The Bestmann-Ohira Reagent and Related Diazo Compounds for the Synthesis of Azaheterocycles. CHEM REC 2020; 20:1394-1408. [PMID: 32986304 DOI: 10.1002/tcr.202000091] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/03/2020] [Accepted: 09/03/2020] [Indexed: 12/14/2022]
Abstract
Azaheterocycles are one of the most prevalent classes of compounds present in numerous bioactive compounds, natural products, and agrochemicals, and undoubtedly, new methods to access them are always in high demand. Among the methods available, the 1,3-dipolar cycloaddition reactions involving diazo compounds are particularly attractive because of their ability to rapidly construct densely functionalized azaheterocycles in a regioselective manner. In this context, the Bestmann-Ohira reagent has become a well-known reagent for the 1,3-dipolar cycloaddition reactions to produce phosphonylated heterocycles, besides its widespread use as a homologating agent for the conversion of aldehydes to alkynes. This account details our efforts toward broadening the synthetic utility of the Bestmann-Ohira reagent and related compounds for the preparation of azaheterocycles such as pyrazoles, spirooxindoles, triazoles, triazolines, and spiropyrazolines, emphasizing on domino multicomponent reactions employing readily available feedstock reagents.
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Affiliation(s)
- Muhammad Fahad Jamali
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Narendra Kumar Vaishanv
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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17
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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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18
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Synthesis of pyrazoles from α-diazo-β-ketosulfones and α-diazo-β-ketophosphonates. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02735-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Chen L, Liu X, Zou Y. Recent Advances in the Construction of Phosphorus‐Substituted Heterocycles, 2009–2019. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901540] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Long Chen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of AntibioticsChengdu University 168 Hua Guan Road Chengdu 610052 Peoples's Republic of China
| | - Xiao‐Yan Liu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of AntibioticsChengdu University 168 Hua Guan Road Chengdu 610052 Peoples's Republic of China
| | - Yun‐Xiang Zou
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of AntibioticsChengdu University 168 Hua Guan Road Chengdu 610052 Peoples's Republic of China
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20
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Chen FJ, Lin Y, Xu M, Xia Y, Wink DJ, Lee D. C-H Insertion by Alkylidene Carbenes To Form 1,2,3-Triazines and Anionic [3 + 2] Dipolar Cycloadditions To Form Tetrazoles: Crucial Roles of Stereoelectronic and Steric Effects. Org Lett 2020; 22:718-723. [PMID: 31909625 DOI: 10.1021/acs.orglett.9b04548] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The synthesis of 1,2,3-triazines and bicyclic tetrazoles from α-azido ketones is described. The common intermediate generated from lithiated trimethylsilyldiazomethane and α-azido ketones diverges depending on the steric bulk of the substituents. The formation of 1,2,3-triazines via a C-H insertion of alkylidene carbene to form 3-azidocyclopropene, followed by its rearrangement, is supported by density functional theory calculations. Tetrazole formation proceeds via a facile anionic [3 + 2] dipolar cycloaddition between a lithiated diazo moiety and an azido group facilitated by the chelation of a lithium ion.
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Affiliation(s)
- Fa-Jie Chen
- Department of Chemistry , University of Illinois at Chicago , 845 West Taylor Street , Chicago , Illinois 60607 , United States
| | - Yongjia Lin
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou , Zhejiang Province 325035 , P. R. China
| | - Man Xu
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou , Zhejiang Province 325035 , P. R. China
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou , Zhejiang Province 325035 , P. R. China
| | - Donald J Wink
- Department of Chemistry , University of Illinois at Chicago , 845 West Taylor Street , Chicago , Illinois 60607 , United States
| | - Daesung Lee
- Department of Chemistry , University of Illinois at Chicago , 845 West Taylor Street , Chicago , Illinois 60607 , United States
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21
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Zhai SJ, Peng X, Zhang FG, Ma JA. Catalytic Direct Regioselective Synthesis of Phosphonylated Tetrazoles from Aryl Diazonium Salts and Seyferth-Gilbert Reagent. Org Lett 2019; 21:9884-9888. [PMID: 31808697 DOI: 10.1021/acs.orglett.9b03800] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Here we report a Ag-catalyzed [3 + 2] cycloaddition reaction between aryl diazonium salts and Seyferth-Gilbert reagent in a regioselective manner. This operationally simple transformation proceeds in an atom-economical way under mild reaction conditions, providing facile access to a broad set of phosphonylated tetrazoles. The synthetic utility of this method is further showcased by a straightforward procedure from upstream aromatic amines, denitrogenation transformations, and preparation of a phosphonylated drug scaffold.
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Affiliation(s)
- Shi-Jing Zhai
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China
| | - Xing Peng
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China
| | - Fa-Guang Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China.,Joint School of NUS & TJU , International Campus of Tianjin University , Fuzhou 350207 , P. R. of China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China.,Joint School of NUS & TJU , International Campus of Tianjin University , Fuzhou 350207 , P. R. of China
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22
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Asymmetric [3+2] Cycloaddition Reactions of α‐Substituted Diazophosphonates with 3‐Acryloyl‐2‐oxazolidinone to Access Chiral Pyrazoline Derivatives with Phosphonyl at a Tetrasubstituted Stereogenic Center. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900679] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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23
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Deacylative 1,6-addition of Bestmann-Ohira reagent to p-quinone methides for the synthesis of α-diazo-β-diarylphosphonates and cis-stilbenyl phosphonates. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.02.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Zhang C, Dong S, Zheng Y, He C, Chen J, Zhen J, Qiu L, Xu X. Synthesis of spiro-4H-pyrazole-oxindoles and fused 1H-pyrazoles via divergent, thermally induced tandem cyclization/migration of alkyne-tethered diazo compounds. Org Biomol Chem 2019; 16:688-692. [PMID: 29239450 DOI: 10.1039/c7ob02802d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A thermally induced, substrate-dependent reaction of alkynyl diazo compounds has been developed. This transformation produces spiro-4H-pyrazole-oxindoles and fused 1H-pyrazoles in good to high yields from the corresponding alpha-cyano and alpha-sulfonyl diazo compounds. The salient features of this reaction include excellent chemoselectivity and atom-economy, mild reaction conditions, simple purification and potential for large scale production.
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Affiliation(s)
- Cheng Zhang
- 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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25
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Cherian RM, Harry NA, Saranya S, Rohit KR, Anilkumar G. Copper-Catalysed Multicomponent Syntheses of Heterocycles. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800619] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Reeba Mary Cherian
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills P O Kottayam, Kerala INDIA 686560
| | - Nissy Ann Harry
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills P O Kottayam, Kerala INDIA 686560
| | - Salim Saranya
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills P O Kottayam, Kerala INDIA 686560
| | - K. R. Rohit
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills P O Kottayam, Kerala INDIA 686560
| | - Gopinathan Anilkumar
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills P O Kottayam, Kerala INDIA 686560
- Advanced Molecular Materials Research Centre (AMMRC); Mahatma Gandhi University; Priyadarsini Hills P O Kottayam, Kerala INDIA 686560
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26
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Zheng B, Chen H, Zhu L, Hou X, Wang Y, Lan Y, Peng Y. Formal Asymmetric Cycloaddition of Activated α,β-Unsaturated Ketones with α-Diazomethylphosphonate Mediated by a Chiral Silver SPINOL Phosphate Catalyst. Org Lett 2019; 21:593-597. [DOI: 10.1021/acs.orglett.8b03436] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bo Zheng
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Haohua Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China
| | - Xiqiang Hou
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Yan Wang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Yungui Peng
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
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27
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A new route to synthesis of substituted pyrazoles through oxidative [3+2] cycloaddition of electron deficient alkenes and diazocarbonyl compounds. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.11.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Kumar AD, Prabhudeva MG, Bharath S, Kumara K, Lokanath NK, Kumar KA. Design and Amberlyst-15 mediated synthesis of novel thienyl-pyrazole carboxamides that potently inhibit Phospholipase A2 by binding to an allosteric site on the enzyme. Bioorg Chem 2018; 80:444-452. [PMID: 29986189 DOI: 10.1016/j.bioorg.2018.06.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 06/14/2018] [Accepted: 06/18/2018] [Indexed: 12/25/2022]
Abstract
Inflammation-mediated disorders are on the rise and hence, there is an urgent need for the design and synthesis of new anti-inflammatory drugs with higher affinity and specificity for their potential targets. The current study presents an effective and new protocol for the synthesis of thienyl-pyrazoles through 3 + 2 annulations using a recyclable heterogeneous catalyst Amberlyst-15. Chalcones 3(a-g) prepared from 3-methylthiophene-2-carbaldehyde and acetophenones by Claisen-Schmidt approach reacted with semicarbazide hydrochloride 4 in the presence of Amberlyst-15 in acetonitrile at room temperature producing thienyl-pyrazole carboxamides 5(a-h) in good yields. Alternatively, the compounds 5(a-h) were prepared by conventional method using acetic acid (30%) medium. Structures of synthesized new pyrazoles were confirmed by spectral and crystallographic studies. All the new compounds were evaluated for their in vitro inhibition of Phospholipase A2 from Vipera russelli and preliminary studies revealed that, amongst the designed series, compounds 5b, 5c and 5h showed promising inhibition. Further, the compounds exhibited linear mixed-type inhibition behavior for the sPLA2 enzyme indicating that they bind to an allosteric site distinct from either the calcium or substrate binding site on the enzyme. These kinetic conclusions were further validated by macromolecular rigid-body docking whereby compounds 5c and 5h showed binding to distinct pockets on the protein. These findings present a promising series of lead molecules that can serve as prototypes for the treatment of inflammatory related disorders.
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Affiliation(s)
- Achutha Dileep Kumar
- Department of Chemistry, Yuvaraja College, University of Mysore, Mysuru 570005, India
| | | | - Srinivasan Bharath
- Marie Skłodowska-Curie Actions Fellow, Rua da Quinta Grande, 6, 2780-156 Oeiras, Portugal
| | - Karthik Kumara
- Department of Studies in Physics, University of Mysore, Mysuru 570006, India
| | | | - Kariyappa Ajay Kumar
- Department of Chemistry, Yuvaraja College, University of Mysore, Mysuru 570005, India.
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29
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Ahamad S, Kumar A, Kant R, Mohanan K. Metal-Free Three-Component Assembly of Fully Substituted 1,2,3-Triazoles. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800340] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Shakir Ahamad
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
- Academy of Scientific and Innovative Research; New Delhi India
| | - Anuj Kumar
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Ruchir Kant
- Molecular and Structural Biology; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
- Academy of Scientific and Innovative Research; New Delhi India
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30
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Dhameja M, Pandey J. Bestmann-Ohira Reagent: A Convenient and Promising Reagent in the Chemical World. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800051] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Manoj Dhameja
- Department of Chemistry; Babasaheb Bhimrao Ambedkar University (Central University); Lucknow 226025 India
| | - Jyoti Pandey
- Department of Chemistry; Babasaheb Bhimrao Ambedkar University (Central University); Lucknow 226025 India
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31
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Amberlyst-15 catalyzed synthesis of novel thiophene–pyrazoline derivatives: spectral and crystallographic characterization and anti-inflammatory and antimicrobial evaluation. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3501-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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32
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Gupta AK, Ahamad S, Vaishanv NK, Kant R, Mohanan K. Base-mediated 1,6-conjugate addition of the Seyferth-Gilbert reagent to para-quinone methides. Org Biomol Chem 2018; 16:4623-4627. [PMID: 29876566 DOI: 10.1039/c8ob01017j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A 1,6-conjugate addition reaction of the Seyferth-Gilbert reagent (SGR) to p-quinone methides is reported. This base-mediated protocol allows rapid access to diarylmethylated diazomethylphosphonates. The reaction proceeds under mild basic conditions, making it a practical approach for the synthesis of diarylmethylated diazomethylphosphonates with a broad substrate scope. Interestingly, the treatment of the conjugate adduct with a catalytic amount of rhodium acetate resulted in the 1,2-aryl migration of the rhodium carbenoid intermediate to generate the corresponding 1,2-diaryl alkenylphosphonates in excellent yields.
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Affiliation(s)
- Ashis Kumar Gupta
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India. and Academy of Scientific and Innovative Research, New Delhi, India
| | - Shakir Ahamad
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India. and Academy of Scientific and Innovative Research, New Delhi, India
| | - Narendra Kumar Vaishanv
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.
| | - Ruchir Kant
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India. and Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
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33
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Nair D, Pavashe P, Namboothiri IN. 1,3-Dipolar cycloaddition of chalcones and arylidene-1,3-dicarbonyls with diazosulfone for the regioselective synthesis of functionalized pyrazoles and pyrazolines. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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34
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Design, synthesis and spectroscopic and crystallographic characterisation of novel functionalized pyrazole derivatives: biological evaluation for their cytotoxic, angiogenic and antioxidant activities. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3445-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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35
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Muthusamy S, Gangadurai C. “On water” cascade synthesis of benzopyranopyrazoles and their macrocycles. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.03.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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36
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Panda N, Ojha S. Facile synthesis of pyrazoles by iron-catalyzed regioselective cyclization of hydrazone and 1,2-diol under ligand-free conditions. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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37
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Chen Z, Zhang Y, Nie J, Ma JA. Transition-Metal-Free [3 + 2] Cycloaddition of Nitroolefins and Diazoacetonitrile: A Facile Access to Multisubstituted Cyanopyrazoles. Org Lett 2018; 20:2120-2124. [DOI: 10.1021/acs.orglett.8b00729] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhen Chen
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering, Tianjin University, Tianjin 300072, P. R. of China
| | - Yue Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering, Tianjin University, Tianjin 300072, P. R. of China
| | - Jing Nie
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering, Tianjin University, Tianjin 300072, P. R. of China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering, Tianjin University, Tianjin 300072, P. R. of China
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38
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Aquino TB, do Nascimento JER, Dias ÍF, de Oliveira DH, Barcellos T, Lenardão EJ, Perin G, Alves D, Jacob RG. Synthesis of (arylselanyl)- and (arylsulfenyl)-alkyl-1,2,3-triazolo-1,3,6-triazonines via a copper-catalyzed multicomponent reaction. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.072] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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39
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Brown AW. Recent Developments in the Chemistry of Pyrazoles. ADVANCES IN HETEROCYCLIC CHEMISTRY 2018. [DOI: 10.1016/bs.aihch.2018.02.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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40
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Ahamad S, Patidar RK, Kumar A, Kant R, Mohanan K. Three-Component Synthesis of 3,4-Disubstituted Pyrazoles Using Diazosulfone as a Diazomethane Surrogate. ChemistrySelect 2017. [DOI: 10.1002/slct.201702384] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shakir Ahamad
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Rajesh Kumar Patidar
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Anuj Kumar
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Ruchir Kant
- Molecular and Structural Biology; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
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41
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Ganesh M, Rao MP, Mirajakar SJ. Part I: Diastereoselective Reactions Involving β-Mono- and β,β′-Disubstituted Alkylidene Oxindoles: Pondering Alkene Geometry. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700410] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Madhu Ganesh
- Department of Chemistry, P.O. Box 1908, B.M.S.; College of Engineering; Bull Temple Road Bengaluru 560019 India
| | - Madhuri P. Rao
- Department of Chemistry, P.O. Box 1908, B.M.S.; College of Engineering; Bull Temple Road Bengaluru 560019 India
| | - Shruti J. Mirajakar
- Department of Chemistry, P.O. Box 1908, B.M.S.; College of Engineering; Bull Temple Road Bengaluru 560019 India
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42
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Lokeshwari DM, Achutha DK, Srinivasan B, Shivalingegowda N, Krishnappagowda LN, Kariyappa AK. Synthesis of novel 2-pyrazoline analogues with potent anti-inflammatory effect mediated by inhibition of phospholipase A2: Crystallographic, in silico docking and QSAR analysis. Bioorg Med Chem Lett 2017; 27:3806-3811. [DOI: 10.1016/j.bmcl.2017.06.063] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 05/31/2017] [Accepted: 06/23/2017] [Indexed: 11/27/2022]
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43
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Prabhudeva MG, Bharath S, Kumar AD, Naveen S, Lokanath NK, Mylarappa BN, Kumar KA. Design and environmentally benign synthesis of novel thiophene appended pyrazole analogues as anti-inflammatory and radical scavenging agents: Crystallographic , in silico modeling, docking and SAR characterization. Bioorg Chem 2017. [DOI: 10.1016/j.bioorg.2017.06.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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44
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Peringer F, do Nascimento JER, Abib PB, Barcellos T, Van der Eycken EV, Perin G, Jacob RG, Alves D. Copper-Catalyzed Multicomponent Reactions: Synthesis of Fused 1,2,3-Triazolo-1,3,6-triazonines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700170] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Fernando Peringer
- LASOL-CCQFA; Universidade Federal de Pelotas - UFPel; P. O. Box 354 96010-900 Pelotas RS Brazil
| | | | - Paola B. Abib
- LASOL-CCQFA; Universidade Federal de Pelotas - UFPel; P. O. Box 354 96010-900 Pelotas RS Brazil
| | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic Products; Universidade de Caxias do Sul; Caxias do Sul RS Brazil
| | - Erik V. Van der Eycken
- Laboratory for Organic and Microwave-Assisted Chemistry (LOMAC); Department of Chemistry; University of Leuven (KU Leuven); Celestijnenlaan 200F 3001 Leuven Belgium
- Peoples Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya street 117198 Moscow Russia
| | - Gelson Perin
- LASOL-CCQFA; Universidade Federal de Pelotas - UFPel; P. O. Box 354 96010-900 Pelotas RS Brazil
| | - Raquel G. Jacob
- LASOL-CCQFA; Universidade Federal de Pelotas - UFPel; P. O. Box 354 96010-900 Pelotas RS Brazil
| | - Diego Alves
- LASOL-CCQFA; Universidade Federal de Pelotas - UFPel; P. O. Box 354 96010-900 Pelotas RS Brazil
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45
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An Easy Access to Bipyrazoles and Unusual Demethylation of Methyl Phosphorous Ester: Exploring the Synthetic Utility of Bestmann-Ohira Reagent. ChemistrySelect 2017. [DOI: 10.1002/slct.201700239] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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46
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Baiju TV, Namboothiri INN. Synthesis of Functionalized Pyrazoles via 1,3-Dipolar Cycloaddition of α-Diazo-β-ketophosphonates, Sufones and Esters with Electron-Deficient Alkenes. CHEM REC 2017; 17:939-955. [PMID: 28266174 DOI: 10.1002/tcr.201600141] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Indexed: 12/14/2022]
Abstract
1,3-Dipolar cycloaddition of diazo compounds with olefinic substrates is a promising atom-economic strategy for the construction of functionalized pyrazoles. Over the last few years, our group has been engaged in the synthesis of phosphonyl/sulfonylpyrazoles and pyrazole esters by employing Bestmann-Ohira Reagent (BOR) and its sulfur and ester analogs as 1,3-dipole precursors with various dipolarophiles. This account describes the novel synthetic methods developed in our laboratory, in the perspective of closely related work by others, for the synthesis of phosphonyl/sulfonylpyrazoles, pyrazole esters and the total synthesis of Withasomnine, a natural product, by using 1,3-dipolar cycloaddition as the key step.
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Affiliation(s)
- T V Baiju
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
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47
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Ma YN, Zhang X, Yang SD. Tandem Oxidative C−H Amination and Iodization to Synthesize Difunctional Atropoisomeric P-Stereogenic Phosphinamides. Chemistry 2017; 23:3007-3011. [DOI: 10.1002/chem.201700218] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Yan-Na Ma
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 73000 P.R. China
| | - Xi Zhang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 73000 P.R. China
| | - Shang-dong Yang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 73000 P.R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Lanzhou 730000 P. R. China
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48
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Ma YN, Cheng MX, Yang SD. Diastereoselective Radical Oxidative C–H Aminations toward Chiral Atropoisomeric (P, N) Ligand Precursors. Org Lett 2017; 19:600-603. [DOI: 10.1021/acs.orglett.6b03625] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yan-Na Ma
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Ming-Xing Cheng
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shang-Dong Yang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
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49
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Gupta AK, Vaishanv NK, Kant R, Mohanan K. Rapid and selective synthesis of spiropyrazolines and pyrazolylphthalides employing Seyferth–Gilbert reagent. Org Biomol Chem 2017; 15:6411-6415. [DOI: 10.1039/c7ob01417a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient protocol for the selective synthesis of spiropyrazoline phosphonates and pyrazolylphthalides employing Seyferth–Gilbert reagent is reported.
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Affiliation(s)
- Ashis Kumar Gupta
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
| | - Narendra Kumar Vaishanv
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Ruchir Kant
- Molecular and Structural Biology Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
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50
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Phatake RS, Mullapudi V, Wakchaure VC, Ramana CV. Fluoride-Mediated Dephosphonylation of α-Diazo-β-carbonyl Phosphonates. Org Lett 2016; 19:372-375. [PMID: 28035831 DOI: 10.1021/acs.orglett.6b03573] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The possibility of fluoride-mediated selective dephosphonylation of α-diazo-β-carbonyl phosphonates such as the Ohira-Bestmann reagent has been proposed and executed. The resulting α-diazocarbonyl intermediates undergo a (3 + 2)-cycloaddition at room temperature with conjugated olefins and benzynes. Interestingly, under the current conditions, the resulting cycloaddition products underwent either N-acylation (with excess α-diazo-β-carbonyl phosphonates) or Michael addition (with conjugated olefins).
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Affiliation(s)
- Ravindra S Phatake
- Organic Chemistry Division, CSIR-National Chemical Laboratory , Dr. HomiBhabha Road, Pune 411008, India
| | - Venkannababu Mullapudi
- Organic Chemistry Division, CSIR-National Chemical Laboratory , Dr. HomiBhabha Road, Pune 411008, India
| | - Vivek C Wakchaure
- Organic Chemistry Division, CSIR-National Chemical Laboratory , Dr. HomiBhabha Road, Pune 411008, India
| | - Chepuri V Ramana
- Organic Chemistry Division, CSIR-National Chemical Laboratory , Dr. HomiBhabha Road, Pune 411008, India
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