The geometrical isomerization of cis-1,2-di-methoxycyclobutane (1) to the trans-isomer (2) and the rearrangement of 1-alkoxy-3-methylenecyclobutanes (4) and (8) to (6) and (10), respectively, are modestly accelerated by the presence of alkoxy groups compared to those of the related hydrocarbons; the effect of the alkoxy group in these reactions is, however, much smaller than that in the analogous cyclopropane rearrangements.
W. Kirmse and H. R. Murawski, J. Chem. Soc., Chem. Commun., 1978, 392 DOI: 10.1039/C39780000392
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