Abstract

Many clean solvents like water, ionic liquids, supercritical fluid, polyglycol, fluorine-containing solvents, and so on are employed to replace the conventional organic solvents. Among these, ionic liquids have attracted considerable attention as the clean designable solvents. Ionic liquids received global attention not only in the academic fields but also in the industrial circles. So far, the normal ionic liquids as the clean solvents, and the functional ionic liquids as the special clean solvents (e.g., chiral solvents), the catalysts, and the supports for reagents as well, have been applied extensively in many organic reactions, such as the alkylation, acylation, esterification, rearrangement, hydroformylation, coupling reactions, Diels–Alder reactions, asymmetric synthesis, and so on. This chapter mainly reviews the progress in the applications of the ionic liquids as the green solvent, dual green solvent, and catalyst for the alkylation and acylation; it is our expectation that this review would provide useful guidance for the related researchers.

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