Crystal form of 6, 7-dihydro-6-mercapto-5H-pyrazolo[1,2-alpha][1,2,4] triazoliumchloride and preparation method thereof
A chloride, 2-a technology, applied in organic chemistry and other directions, can solve the problems of high equipment requirements, complicated operation, long production cycle, etc., and achieve the effects of high crystal purity, simple operation and low cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0038] Example 1
[0039] Dissolve 200 g of 6,7-dihydro-6-mercapto-5H-pyrazole[1,2-α][1,2,4]triazole ylide and 150 mL of methanol, and add 1500 mL of acetone under stirring. Cool in an ice-water bath, continue to stir until a large amount of solid precipitates, keep for 5h, filter with suction, and dry to obtain white crystals 165.1g, mp 124~126°C, HPLC purity 97.6%. The obtained crystals are analyzed by powder X-ray diffraction. The results are shown in the table. 1. The powder X-ray diffraction spectrum of the obtained crystal is attached figure 1 .
[0040] Table 1
[0041] d value
Example Embodiment
[0042] Example 2
[0043] Dissolve 200 g of crude 6,7-dihydro-6-mercapto-5H-pyrazole [1,2-α][1,2,4]triazole ylide chloride in 150 mL of methanol, and then add the isopropyl alcohol dropwise with stirring 900 mL of propanol, continue to stir until a large amount of solid precipitates, cool in an ice-water bath, keep for 5 hours, filter with suction, and dry to obtain 155.7 g of white crystals. mp 126~128℃, HPLC purity 98.0%, powder X-ray diffraction analysis of the obtained crystals, the results are shown in Table 2, and the obtained crystal powder X-ray diffraction spectrum is shown in the attached figure 2 .
[0044] Table 2
[0045] d value
[0046] d value
Example Embodiment
[0047] Example 3
[0048] Dissolve 200 g of 6,7-dihydro-6-mercapto-5H-pyrazole[1,2-α][1,2,4]triazole ylide chloride in 150 mL of methanol, and add ethyl acetate dropwise with stirring 250mL, 250mL of isopropyl ether, cooling in an ice-water bath, continue to stir until a large amount of solids precipitate, keep for 5h, suction filtration, and dry to obtain white crystals 162.4g, mp126~128℃, HPLC purity 98.2%, the obtained crystals are subjected to powder X-ray Diffraction analysis, the results are shown in Table 3, and the powder X-ray diffraction spectrum of the obtained crystal is shown in the attachment image 3 .
[0049] table 3
[0050] d value
[0051] d value
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.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap