A kind of synthetic method of the pyrazole compound of 4-iodination-n-arylation
A synthesis method and compound technology are applied in the synthesis field of pyrazole compounds, can solve problems such as restricted development and limited types of pyrazoles, and achieve the effects of high raw material economy, high product yield, and cheap and easy-to-obtain process raw materials
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0018] Add 3,5-diethylpyrazole (10 mmol), iodobenzene acetate (15 mmol), AcOH (10 mmol), and dichloromethane 100 mL in sequence to a dry reaction tube, and react at room temperature for 10 hours. Potassium carbonate (10 mmol) was added under nitrogen protection, and the reaction was completed at room temperature for 24 hours. The corresponding product was obtained as a yellow liquid by column chromatography, and the yield was 74%. The name of the product is: 3,5-diethyl-4-iodo-1-phenyl-1-hydro-pyrazole. The structural formula is as follows:
[0019] ;
[0020] The proton nuclear magnetic resonance spectrum data of this product compound are as follows: 1 H NMR (400 MHz, CDCl 3 ) δ 7.48-7.41(m, 2H), 7.40-7.34 (m, 3H), 2.80-2.60 (m, 4H), 1.28 (t, J = 7.6 Hz, 3H), 1.09(t, J = 7.6 Hz, 3H); The carbon NMR data of the compound are as follows: 13 C NMR (100 MHz, CDCl 3 ) δ155.2, 145.8, 139.9, 129.0, 128.0, 125.2, 62.6, 21.8, 19.8, 13.2, 13.1; The high resolution mass spe...
Embodiment 2
[0022]
[0023] Add 3,5-diethylpyrazole (10 mmol), trivalent iodine compound (20 mmol), HClO in sequence to a dry reaction tube 4 (20 mmol), 100 mL of toluene, and the reaction at room temperature was completed for 20 hours. Triethylamine (20 mmol) was added under the protection of nitrogen, heated at 50°C for 10 hours, and the reaction was completed. The product was obtained by recrystallization from petroleum ether / ethyl acetate, and the yield was 65%. The name of the product is: 3,5-diethyl-4-iodo-1-(p-methylphenyl)-1hydropyrazole. The structural formula is as follows:
[0024] ; The proton nuclear magnetic resonance spectrum data of this product compound are as follows: 1 H NMR (400 MHz, CDCl 3 ) δ 7.25 (s, 4H), 2.73-2.57 (m, 4H), 2.40 (s, 3H), 1.28 (t, J = 7.6 Hz,3H), 1.09 (t, J = 7.6 Hz, 3H); The carbon NMR data of the compound are as follows: 13 C NMR (100 MHz, CDCl 3 ) δ 155.0, 145.9, 138.1, 137.5, 129.6, 125.3, 62.2, 21.8, 21.1, 19.9,13.3, 13.2; The hi...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com