2,5-Disubstituted furans have been synthesized via the isomerization–dehydration of alkynediols catalysed by Pd2(dba)3·CHCl3, Bun3P and perfluorinated resinsulfonic acid at 130 °C in good yields; (H4dba = dibenzylideneacetone).
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Ji et al. (1993) studied this question.
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