Gemini ionic liquid with fluorous biphasic property, and catalyst prepared by utilizing ionic liquid and application thereof

Abstract

The invention discloses gemini ionic liquid with fluorous biphasic property. The molecular formula of the ionic liquid is [(R1N2C3H3)2R]2+.[2X-]. The structure of the ionic liquid is shown as the general formula (I) in the specification, wherein R1 represents hydrogen or C1-C8 alkyl; R represents ethylidene oxyl element, is selected from-(CH2CH2O)qCH2CH2- and is formed by polyethylene glycol 400-10000, and q is 6-250; and X represents HBF4, HPF6, HNO3 or halogenated hydrogen. A catalyst can be prepared immediately after adding palladium, rhodium or nickel catalyst into the gemini ionic liquid with fluorous biphasic property for coordination, and can be used in HECK reaction, C-C coupling reaction and isomerization reaction. The ionic liquid is not easy to volatilize, and the catalyst prepared by utilizing the ionic liquid is used in HECK reaction, C-C coupling reaction and isomerization reaction, has high catalytic efficiency and can be reused.

Description

technical field [0001] The invention belongs to reaction medium ionic liquid, catalyst prepared by the ionic liquid and application thereof, in particular a gemini ionic liquid with fluorine two-phase property, catalyst prepared by using the ionic liquid and application of the catalyst. Background technique [0002] The efficient separation and recovery of catalysts has always been the frontier and hotspot of green chemistry research. Horvath I T, et al reported that fluorine two-phase can form a "high-temperature homogeneous, low-temperature two-phase" system, which makes the reaction homogeneous and efficient and the products are easy to separate; Joep van den Broeke, et al reported that fluorine-containing ionic liquid can form a temperature-controlled Two-phase system, but the structure of the above-mentioned fluorine-containing system is complex and expensive; Wei Li et al. reported that the temperature-controlled polyether-type ionic liquid has the characteristics of "...

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Problems solved by technology

Horvath I T, et al reported that fluorine two-phase can form a "high-temperature homogeneous, low-temperature two-phase" system, which makes the reaction homogeneous and efficient and the products are easy to separate; Joep van den Broeke, et al reported that fluorine-containing ionic liquid can form a temperature-controlled Two-phase system, but the structure of the above-mentioned fluorine-containing system is complex and expensive; Wei Li et al. reported that the temperature-controlled polyether-type ionic liquid has the characteristics of "high-temperature homogeneous phase and low-temperature phase separation" in a mixed solvent of toluene and n-heptane. In order to solve the above problems, people such as Bao Qinai reported that polyethylene glycol can have phase separation at room temperature and miscibility at high temperature with some organic solvents (such as benzene, toluene) or some multi-component solvent systems; Imidazolium ionic liquids have high thermal stability and good solubility to metals; Zhi Huizhen et al. reported that polyethylene glycol ionic liquids and toluene have phase separation at room temperature and mutual solubility at high temperature, but this method requires two steps. The operation is complicated and the yield is low. The ionic liquid system has different organic solvent ratios for different systems, and has disadvantages such as complicated operation.

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