Article ID Journal Published Year Pages File Type
177467 Dyes and Pigments 2009 4 Pages PDF
Abstract

A Brønsted-acidic task-specific ionic liquid, 1-methyl-3-propane sulfonic-imidazolium hydrosulfate ([MIMPS]HSO4), was employed as a catalyst for the synthesis of 14-alkyl- or aryl-14H-dibenzo[a,j]xanthenes via the one-pot condensation of β-naphthol with aliphatic or aromatic aldehydes. Various aliphatic and aromatic aldehydes were used in the reaction and in all cases the desired products were synthesized successfully. The novel synthesis method offers the advantages of high yields, short reaction times, simplicity and easy workup compared to the conventional method of syntheses. The catalyst could be recycled and reused five times without a noticeably decrease in its activity.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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