☆ 4.1 Article

Preparation of various xanthene derivatives over sulfonic acid functionalized imidazolium salts (SAFIS) as novel, highly efficient and reusable catalysts

COMPTES RENDUS CHIMIE (2012)

期刊

COMPTES RENDUS CHIMIE

卷 15, 期 8, 页码 719-736

出版社

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

DOI: 10.1016/j.crci.2012.05.003

关键词

Sulfonic acid functionalized imidazolium salt; Ionic liquid; 14-aryl-14H-dibenzo[aj]xanthene; Tetrahydrobenzo[a]xanthene-11-one; 1,8-dioxo-octahydroxanthene; Solvent-free

类别

Chemistry, Multidisciplinary

资金

Research Affairs Office of Bu-Ali Sina University [32-1716]
Center of Excellence in Development of Chemical Method (CEDCM), Hamedan, I.R. Iran

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摘要

In this work, some novel sulfonic acid functionalized imidazolium salts (SAFIS), as a new category of ionic liquids, are synthesized by eco-friendly and simple procedures, and used as highly efficient and reusable catalysts to promote the following one-pot multicomponent organic transformations under solvent-free conditions: (i) the synthesis of 14-aryl-14H-dibenzo[aj]xanthenes from beta-naphthol (2 eq.) and arylaldehydes (1 eq.), (ii) the preparation of tetrahydrobenzo[a]xanthene-11-ones from beta-naphthol, arylaldehydes and dimedone, and (iii) the synthesis of 1,8-dioxo-octahydroxanthenes from dimedone (2 eq.) and aromatic aldehydes (1 eq.). Environmentally benign, simple methodologies, easy workup procedure, clean reaction, short reaction time, high yield and easy preparation of the catalysts are some advantages of this work. (C) 2012 published by Elsevier Masson SAS on behalf of Academie des sciences.

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