Chemistry Letters, Vol.33, No.7, 876-877, 2004
Eight-membered ring formation via olefin insertion into a carbon-carbon single bond
Treatment of cyclobutanone having an o-styryl group at the 2-position with a catalytic amount of rhodium-phosphine complex afforded eight-membered ring ketones via intramolecular insertion of the C=C bond into the C-C single bond of the cyclobutanone.