Production of furan, for use as intermediate in thiophene synthesis, by dehydrobromination of dibromotetrahydrofuran in presence of base and in organic solvent

摘要

The process comprises the stage of dehydrobromination of 3,4-dibromotetrahydrofuran, in presence of base and in organic solvent medium, and preferably also in presence of phase transfer agent, in amount up to 20 mol. % (preferably 1-5 mol. %) in relation to 3,4-dibromotetrahydrofuran. The molar ratio of base to 3,4-dibromotetrahydrofuran is 2-8, preferably 2.5-3.5.