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Sudarshana KA, Sarma MJ, Radhakrishnan M, Chakravarty S, Srihari P, Mehta G. A protocol for directly accessing geminal C-4 diarylated pyrazol-5(4 H)-ones via tandem C-H aryne insertion and their inceptive neurobiological evaluation. Org Biomol Chem 2024; 22:714-719. [PMID: 38165701 DOI: 10.1039/d3ob01932b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Geminal C-4 diarylation of substituted pyrazol-5(4H)-ones with in situ generated arynes as the aryl source has been achieved in a one-flask operation. All the newly accessed C4-gem-diarylated pyrazolone entities were found to be non-cytotoxic with varying AChE enzyme inhibitory activities and BBB permeability attributes that augur well for further advancement towards CNS therapeutics for untreatable disorders.
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Affiliation(s)
- K A Sudarshana
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Manas Jyoti Sarma
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India.
- School of Chemistry, University of Hyderabad, Hyderabad-500046, India.
| | - Mydhili Radhakrishnan
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - Sumana Chakravarty
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - Pabbaraja Srihari
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Hyderabad-500046, India.
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Liao W, Du H, Chen M, Xiong Y, Zhou H, Qin T, Liu B. Sequential regioselective arylation of pyrazolones with diaryliodonium salts. Org Biomol Chem 2024; 22:708-713. [PMID: 38165289 DOI: 10.1039/d3ob01854g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The introduction of aromatic substituents into organic compounds significantly alters their physical and chemical characteristics. Yet, achieving precise control over the site-selectivity of arylation continues to pose a considerable challenge. We present here a controllable method for the site-selective mono-, di-, and triarylation of pyrazolone with diaryliodonium salts. The method showcases robustness, flexibility, and excellent compatibility with a broad range of functional groups. It enables control over both the site of arylation and the number of aryl additions. Specifically, three of the four substitutable positions in pyrazolone can be selectively arylated, effectively producing four products under controlled conditions. Additionally, the method supports one-pot sequential arylation, leading to an array of products with diverse aromatic substituents. Control experiments revealed the specific conditions of each reaction step.
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Affiliation(s)
- Wenbo Liao
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, PR China.
| | - Hairui Du
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, PR China.
| | - Mingxiu Chen
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, PR China.
| | - Yan Xiong
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, PR China.
| | - Heye Zhou
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, PR China.
| | - Tao Qin
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, PR China.
| | - Bin Liu
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, PR China.
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Chen LM, Zhou C, Li J, Li J, Guo XQ, Kang TR. Copper-catalyzed reactions of α,β-unsaturated N-tosylhydrazones with diaryliodonium salts to construct N-arylpyrazoles and diaryl sulfones. Org Biomol Chem 2022; 20:7011-7016. [PMID: 36000782 DOI: 10.1039/d2ob01338j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, an economical copper-catalyzed reaction of α,β-unsaturated N-tosylhydrazones with diaryliodonium salts to construct both N-arylpyrazoles and diaryl sulfones has been developed. Both the p-toluenesulfonyl anion and the 3-arylpyrazole intermediates were formed in situ from N-tosylhydrazones. Subsequently, the former reacted rapidly with diaryliodonium salts to give diaryl sulfones and aryl iodide intermediates, and the latter reacted with aryl iodide to give N-arylpyrazoles under copper-catalyzed conditions. Using unsymmetrical mesityl phenyliodonium salts as substrates, mesityl p-toluenesulfide was obtained as the major product. This reaction took full advantage of the "waste" part of substrates to form an extra diaryl sulfone.
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Affiliation(s)
- Lian-Mei Chen
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, P. R. China.
| | - Chuang Zhou
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, P. R. China.
| | - Jing Li
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, P. R. China.
| | - Jun Li
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, P. R. China.
| | - Xiao-Qiang Guo
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, P. R. China.
| | - Tai-Ran Kang
- School of Food and Biological Engineering, Chengdu University, Chengdu 610106, P. R. China.
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Liu Q, Huang T, Zhao X, Wu J, Cao S. Bismuth(III)-Promoted Trifluoromethylthiolation of Pyrazolin-5-ones with Trifluoromethanesulfenamide. ACS OMEGA 2017; 2:7755-7759. [PMID: 31457332 PMCID: PMC6645000 DOI: 10.1021/acsomega.7b01453] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 10/31/2017] [Indexed: 06/10/2023]
Abstract
An efficient and facile method for the synthesis of trifluoromethylthiolated 5-hydroxy-1H-pyrazole derivatives by reaction of pyrazolin-5-ones with trifluoromethanesulfenamide (PhNHSCF3) in the presence of BiCl3 was developed.
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Affiliation(s)
- Qingyun Liu
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China
| | - Tao Huang
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China
| | - Xianghu Zhao
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China
| | - Jingjing Wu
- School
of Chemical and Environmental Engineering, Shanghai Institute of Technology (SIT), Shanghai 201418, China
| | - Song Cao
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China
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Yin K, Zhang R. Transition-Metal-Free Direct C-H Arylation of Quinoxalin-2(1H)-ones with Diaryliodonium Salts at Room Temperature. Org Lett 2017; 19:1530-1533. [PMID: 28300414 DOI: 10.1021/acs.orglett.7b00310] [Citation(s) in RCA: 145] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A method of synthesizing 3-arylquinoxalin-2(1H)-ones using diaryliodonium tetrafluoroborates under mild conditions is described. This protocol has a wide substrate scope and enables direct C-H functionalization. The synthetic potential of this coupling was explored using a range of readily accessible diaryliodonium salts and quinoxalin-2(1H)-ones.
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Affiliation(s)
- Kun Yin
- School of Chemical Science and Engineering, Tongji University , 1239 Siping Road, Shanghai 200092, China
| | - Ronghua Zhang
- School of Chemical Science and Engineering, Tongji University , 1239 Siping Road, Shanghai 200092, China.,Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University , 1239 Siping Road, Shanghai 200092, China
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