Novel phosphonium-based ionic liquid and reaction solvent using the same

摘要

Task: Provided is an ionic liquid of phosphinium salt whose viscosity is low and which does not affect the diffusion and convection of the reaction substrate whose reactivity with the reaction substrate is extremely low and whose water content is extremely low and which in this way as a solvent for various organic Synthesis reactions is usable. Means for Solving the Problem: An ionic liquid of quaternary phosphonium salt or a reaction solvent thereof, represented by the following formula (1): $ F1 [wherein R SUB 1 / SUB, R SUB 2 / SUB, R SUB 3 / SUB and R SUB 4 / SUB each represents a linear alkyl group having a carbon number of 1 to 6, a branched alkyl group, an alicyclic alkyl group or an alkoxyalkyl group represented by (CH SUB 2 / SUB) SUB n / SUB OR SUB 5 / SUB, (where n is an integer between 1 and 6 and R SUB 5 / SUB denotes a methyl group or an ethyl group) and at least one of R SUB 1 / SUB, R SUB 2 / SUB, R SUB 3 / SUB and R SUB 4 / SUB is an alkoxyalkyl group. R SUB 1 / SUB, R SUB 2 / SUB, R SUB 3 / SUB and R SUB 4 / SUB may be identical or different from each other, and R SUB 1 / SUB and R SUB 2 / SUB may be ring-shaped. X are anions.]