The study of furan synthesis from butadiene indicates that high selectivities in furan may be obtained only at low conversion and low oxygen/butadiene ratios. The max. yields of furan obtained are approx. 30%, suggesting a consecutive mechanism of malic anhydride synthesis from butadiene, with furan as the intermediate, and a ratio of rate consts. of the two consecutive reactions close to 1.0, which is confirmed also by the similar temps. of onset in butadiene and furan formation. [on SciFinder(R)]
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