Supramolecular onium salt catalyst for synthesizing carbonic ester and preparation method thereof
A supramolecular and catalyst technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve problems such as improving solubility and difficult synthesis of pillar aromatics
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0045] A method for preparing a supramolecular onium salt catalyst for synthesizing carbonate. The invention creatively introduces imidazole into the main chain of pillar arene, and makes the unit catalyst more stable by selecting and controlling the reaction raw materials, reaction conditions and reaction equipment. And catalytic active center, improve the catalytic reaction activity, obtain a kind of novel supramolecular onium salt, apply to the synthesis of carbonate products, its specific experimental steps include as follows:
[0046] Step 1, the raw material and the binary halogenated hydrocarbon are stirred and mixed at a molar ratio of 1:1, put into the refining kettle and stirred and mixed, N 2 Protection, ensure that the pressure in the kettle is 0.15MPa, react at 70°C for 2h, wash, concentrate and purify to obtain compound A;
[0047] Step 2, compound A is dissolved in p-diphenyl ether, the molar ratio of compound A to p-diphenyl ether is 1:1-5, adding Lewis acid, t...
Embodiment 1
[0054] Step 1, imidazole (20mmol) mixes with dichloromethane (20mmol), stirs and mixes and puts into 100ml refined still and stirs and mixes, N 2 (purity 99%) protection, ensure that the pressure in the kettle is 0.15MPa, react at 70°C for 2h, wash, concentrate and purify to obtain compound A;
[0055] Step 2, the compound A (20mmol) is dissolved in p-diphenylmethyl ether (100mmol), copper chloride (10mmol) is added in a planetary ball mill agitator, the rotation is 10rpm, the revolution is 5rpm, and the reaction is carried out at normal temperature for 20min. Washing with water at ℃, the organic layer was purified to obtain compound B;
[0056] Step 3, the compound B (30mmol) was dissolved in dichloroethane (100mmol), paraformaldehyde (20mmol) and boron trifluoride ether (10mmol) were added, reacted at room temperature for 24h, washed and concentrated to obtain super Molecular onium salt, n is 3. NMR spectrum such as figure 1 shown. 1 H NMR (500MHz, CDCl 3 )δ7.92(s,1H),7...
Embodiment 2
[0060] Step 1, 4-methylimidazole (20mmol) is mixed with dibromomethane (5mmol) and diiodomethane (15mmol), stirred and mixed and put into a 100ml refining kettle and stirred and mixed, N 2 (purity 99%) protection, ensure that the pressure in the kettle is 0.15MPa, react at 70°C for 2h, wash, concentrate and purify Compound A;
[0061] Step 2, the compound A (50mmol) is dissolved in p-diphenyl ether (100mmol), and stannous chloride (3mmol) and titanium tetrachloride (7mmol) are added in a planetary ball mill agitator, and the rotation is 15rpm, and the revolution is 8rpm , react at room temperature for 20 minutes, wash with water at -2°C, and purify the organic layer to obtain compound B;
[0062] Step 3, the compound B (50mmol) was dissolved in dichloroethane (50mmol), paraformaldehyde (50mmol) and boron trifluoride ether (5mmol) were added, reacted at room temperature for 24h, washed and concentrated to obtain super Molecular onium salt, n is 5. NMR H spectrum such as fig...
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