BENZYL-PYRIDINIUM AND -IMIDAZOLINIUM IONIC LIQUID SALTS FOR USE IN PLANAR CHROMATOGRAPHY

摘要

The invention relates to an ionic liquid compound of formula (I)or (II) wherein each ring comprising the nitrogen atom is independently selected from the group consisting of pyridinium, imidazolium, pyrazinium, pyrrolium, pyrazolium, thiazolium, triazolium, indolium, tetrazolium, pyrimidinium, pyridazinium, piperazinium, and piperidinium; each group being optionally substituted with one, two, or three substituents selected from C_1-12alkyl and C_1-12alkoxy; L¹ is C_1-12alkylene; L² is C_1-12alkylene; L³ is a single bond or C_1-12alkylene; wherein one carbon of the C_1-12alkylene is optionally replaced by one or more heteroatoms; Y¹ is C_6-12aryl substituted with one, two, or three substituents each independently selected from the group consisting of halo, haloC_1-6alkyl, and haloC_1-6alkoxy; Y² is C_6-12aryl substituted with one, two, or three substituents each independently selected from the group consisting of halo, haloC_1-6alkyl, and haloC_1-6alkoxy; A is selected from the group consisting of [Br], [Cl], [PF₆], [AsF₆], [SbF₆], [N(SO₂CF₃)₂], [BF₄], [CF₃SO₃], [CH₃CO₂], [CF₃SO₂], [NO₂], [NO₃], [ClO₄], [I], and [AlR¹_4-nR²n]; R¹ is halo or C_1-12alkyl; R² is halo; and n is an integer selected from 0, 1, 2, 3, or 4. The invention further relates to uses of the ionic liquid compounds of the invention as well as to methods for their preparation.