New [1,2,3]-thiobiazole derivative and its synthesis and use
A technology of thiadiazole derivatives and synthesis methods, applied in the field of [1], can solve the problems of few reports on the screening of induced disease-resistant activity, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0040] Preparation of methyl carbazate
[0041] Add 9 g (0.1 mol) of dimethyl carbonate and 5.4 mL (0.095 mol) of 85% hydrazine hydrate into a 50 mL round bottom flask equipped with a condensing reflux tube, reflux at 50°C for 20 minutes, then stir at 25°C for 20 minutes After 1 hour, the methanol, water and a small amount of unreacted dimethyl carbonate were evaporated under reduced pressure with a water pump, and the residue was dried to obtain 8.1 g of white crystals, with a yield of 95%.
Embodiment 2
[0043] Preparation of 3-(methoxycarbonylhydrazone)-butyric acid ethyl ester
[0044] Add 7.28g (0.06mol) of ethyl acetoacetate and 3.7mL of ethanol solution into a 50mL three-neck flask, and slowly add dropwise a solution of 5.02g (0.06mol) of methyl carbazate and 16.7mL of ethanol at room temperature. After the addition, the mixture was stirred at room temperature for 6 hours, and the ethanol was evaporated under reduced pressure to obtain 11.26 g of a white solid with a yield of 100%.
Embodiment 3
[0046] Preparation of ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate
[0047] Add 44mL of thionyl chloride to a 250mL three-necked flask equipped with a drying tube and an exhaust gas absorption device, and slowly add 40.57g (0.20mol) of 3-(methoxycarbonylhydrazone)-butyric acid ethyl Esters and 45ml of dichloromethane solution, control the temperature below 20 ° C. After the addition was complete, the mixture was stirred at room temperature for 20 hours. The excess thionyl chloride was first distilled off under normal pressure, and then distilled under reduced pressure to obtain 25.94 g of a light yellow fraction at 400 Pa, 76-78 ° C, with a yield of 75%.
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