Synthesis of alkyl iodides from alcohols with silica iodide as a new heterogeneous regent

Alkyl halides are versatile intermediates in organic synthesis, and their transformation to useful compoundsare well documented in the literature[1]. Amongst alkyl halides, alkyl iodides are used for ionic or radical carbon-carbon coupling reactions such as their application in substitution, elimination, coupling reactions, etc[2]. Iodination of alcohols is the most general protocol for the preparation of alkyl iodides and therefore this conversion is a frequently encountered transformation in organic synthesis [3]. Silica gel is used extensively as a support in organic chemistry. Modified silica supports for functional-group transformation are also of interest. One of the modified silica based materials is silica chloride, which has been reported as an efficient reagent in synthesis of many rang of organic compounds [4]. In this work, we prepared a new heterogeneous reagent SiO2–I as simple, mild and high yield procedure for the iodination of allylic, allyl and benzylic alcohols.SiO2-I wascharacterized by FT-IR, EDX and qualitative analysis.