Add time:08/18/2019         Source:sciencedirect.com

The rearrangement of 1,4-bis-aryloxybut-2-ynes to 4b,9b-dihydro-4b,9b-dimethylbenzofuro (3,2-b) benzofuran is described. The compounds arising from the dehydration of 2,3-(o-hydroxyphenyl)-2,3-dihydroxybutane, reported earlier in the literature, are shown to possess benzofuro-(2,3-b) benzofuran system.

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