Method for microwave synthesis of organic phosphine-functionalized imidazolium-based ionic liquid

A technology for functionalizing imidazoles and ionic liquids, which is applied in organic chemistry, chemical instruments and methods, compounds of Group 5/15 elements of the periodic table, etc., can solve the problems of unreported synthesis of imidazole ionic liquids, and achieve good application Prospect, short reaction time, and high raw material utilization
CN103374035AInactive Publication Date: 2013-10-30NINGBO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO UNIV
Publication Date
2013-10-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for microwave synthesis of organic phosphine-functionalized imidazolium-based ionic liquid. The method is characterized by comprising the following steps of: mixing imidazole compounds with bromo-alkyl diphenyl phosphine oxide, bromo-alkyl phenyl ethyl phosphonate or bromo-alkyl diethyl phosphonate at a molar ratio of 1:(1-1.2) during preparation, putting the mixture into a microwave reacting device, reacting for 60-150 minutes at the microwave power of 280-500 W and the reaction temperature of 80-120 DEG C to obtain crude products, and removing unreacted raw materials, so as to obtain the organic phosphine-functionalized imidazolium-based ionic liquid. According to the method, a novel organic phosphine-functionalized imidazolium-based ionic liquid is provided and is simultaneously synthesized by utilizing microwave radiation and heating in an efficient, quick and low-cost manner, the reaction time is greatly shortened, the reaction rate is improved, and the yields of all the prepared ionic liquids are relatively high; the raw material utilization ratio is relatively high, no by-product is produced, and the synthesized ionic liquid is easy to purify.
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Description

technical field

[0001] The invention relates to a preparation method of imidazole ionic liquid, in particular to a preparation method of organic phosphine functionalized imidazole ionic liquid. Background technique

[0002] Ionic liquids are salts that are liquid at low temperatures (<100°C). This kind of salt that can maintain a liquid state at low temperature is different from traditional organic solvents. It has many excellent properties: low vapor pressure, non-volatile, non-toxic, non-flammable and explosive, difficult to oxidize, and has high thermal stability. Compatible with organic solvents, etc. In the past ten years, ionic liquids have been widely used in the research and development of organic synthesis, electrochemistry, chemical separation and preparation of polymer materials.

[0003] The study of ionic liquids is a relatively new field of research. At present, the preparation of ionic liquids mostly adopts the traditional heating method. The synthesis ...

Claims

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