Stereospecific annulation and sequential ring-opening of (R)-carvone: Formation of a novel tricyclic dione
作者:Wie Zhang、Paul Dowd
DOI:10.1016/s0040-4039(00)77053-5
日期:1994.7
to an unusual carbon skeleton rearrangement. The carbonyl group of carvone enhances the reactivity of the radical cyclization, changes the ring-opening pathway and leads to the formation of a new tricyclic dione product.
Free radical annulation of dichlorocyclobutanones with sequential ring expansion
作者:Paul Dowd、Wei Zhang、Steven J. Geib
DOI:10.1016/0040-4020(95)00093-n
日期:1995.3
reaction of dichloroketene with 1,5-dienes undergo intramolecular freeradical annulation. Lewis acid-promoted ring-opening of the cyclized cyclobutanones then yields novel ringexpansion products. Reaction of (R)-carvone provides an unusual example leading to the formation of a tricyclic dione. The carbonyl group of carvone enhances the radical cyclization and influences the ring-opening pathway.