Abstract
Various mixed carbonates can be conveniently prepared in good yields using the corresponding alcohols, alkyl halides under CO2 atmosphere in the presence of potassium carbonate or sodium carbonate and tetrabutylammonium iodide.
Highlights
Organic carbonates have played very important roles in the area of Synthetic Organic Chemistry, as key intermediates or as novel protecting groups [1]
First we sought to examine the best reaction conditions for the preparation of unsymmetrical carbonates under a CO2 atmosphere in the presence of K2CO3 using benzyl alcohol and benzyl halides as the substrates (Scheme 1)
The reaction of benzyl alcohol and benzyl halides under a CO2 atmosphere with additives gave very poor yields of carbonate (Table 1, entry 1)
Summary
Organic carbonates have played very important roles in the area of Synthetic Organic Chemistry, as key intermediates or as novel protecting groups [1]. Jung et al reported a cesium carbonate (Cs2CO3) and tetrabutylammonium iodide (TBAI) promoted O-alkylation of alcohols for the preparation of mixed alkyl carbonates under a CO2 atmosphere [8]. First we sought to examine the best reaction conditions for the preparation of unsymmetrical carbonates under a CO2 atmosphere in the presence of K2CO3 using benzyl alcohol and benzyl halides as the substrates (Scheme 1).
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