Available online at www.scholarsresearchlibrary.com Scholars Research Library Archives of Applied Science Research, 2010, 2 (4): 235-239 (http://scholarsresearchlibrary.com/archive.html) ISSN 0975-508X CODEN (USA) AASRC9 235 Scholar Research Library The Task Specific Ionic Liquid promoted reaction: An expeditious synthesis of privileged 1,8 - Dioxo-octahydroxanthene Arjun Kumbhar, Santosh Kamble, Gajanan Rashinkar, Kavita Mote and Rajashri Salunkhe Department of Chemistry, Shivaji University, Kolhapur, (M.S) India ______________________________________________________________________________ ABSTRACT 1,8 - Dioxo-octahydroxanthene were efficiently prepared by a recyclable carboxyl-functionalized [cmmim] [BF 4 ] Task Specific Ionic Liquid [TSIL] in aqueous media in high yield and the ionic liquid can be recycled at least 6 times without significant loss of activity. Key words: Xanthenes, Task Specific Ionic Liquid, Recyclable Catalyst, Aqueous media. ______________________________________________________________________________ INTRODUCTION Xanthene derivatives have recently received great attention because of their wide range of therapeutic and biological properties[1]. Further they are very important class of compounds widely used in dyes, laser technology and in fluorescent materials [2]. The synthesis of xanthenediones usually condenses with appropriate active methylene carbonyl compounds and aldehydes catalyzed by organic and mineral acids, which often suffers from the disadvantages of long reaction times, harsh reaction conditions, toxicity and difficulty in product separation. In spite of potential utility of aforementioned routes for the synthesis of xanthene derivatives, many of these methods involve expensive reagents, strong acidic conditions, low yield and use of excess reagents/catalyst and toxic solvents. We disclosed herein, the new and efficient catalyst with high catalytic activity, short reaction time, recyclability and simple work-up under acidic and mild condition. Ionic liquids have attracted extensive interest as excellent alternatives due to their favorable properties[3]. The use of ionic liquids as reaction medium and catalyst may offer a convenient solution to both the solvent emission and catalytic recycling problem. In the last few years, many innovative concepts have been created in utilizing the specific properties of specific ionic liquids