Abstract
This paper reports a direct route for the preparation of cyclic styrene carbonate from styrene, which avoids the preliminary synthesis and isolation of styrene oxide. A catalyst system consisting of Au/SiO 2, zinc bromide, and tetrabutylammonium bromide (Bu 4NBr) has been applied to the one-pot synthesis of styrene carbonate from styrene, organic peroxide, and CO 2. Au/SiO 2 is active for the epoxidation of styrene, and zinc bromide and Bu 4NBr cooperatively catalyze the subsequent CO 2 cycloaddition to epoxide. The influence of various reaction parameters, such as CO 2 pressure, reaction temperature, reaction time, catalyst amount, ratio of oxidant to styrene, and oxidant type, has been investigated in detail.
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