The acid catalysed rearrangement of hydrobenzofuranoid neolignans into bicyclo[3.2.1]octanoid compounds is described; this rearrangement which, according to a literature report, can also take place in the opposite direction, seems to be governed by stereochemical factors.
M. A. De Alvarenga, U. Brocksom, O. R. Gottlieb, M. Yoshida, R. B. Filho and R. Figliuolo, J. Chem. Soc., Chem. Commun., 1978, 831 DOI: 10.1039/C39780000831
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