P. Dowd et al., CYCLOBUTANONE-BASED TANDEM FREE-RADICAL REARRANGEMENTS - FORMATION OFBICYCLIC AND TRICYCLIC KETONES, Tetrahedron, 51(1), 1995, pp. 39-50
Free radical reaction of endo-bromopropylbicyclo[4.2.0]oct-2-en-7-one
1 leads to deep-seated rearrangement and formation of the bridged tric
yclic ketone 2. An authentic sample of 2 was prepared. Reaction of end
obromoethylbicyclo[4.2.0]oct-2-en-7-one 18 generates an analogous brid
ged tricyclic ketone 20 together with cis-bicyclo[4.4.0]decenone 22. E
xperiments using Bu(3)SnD were carried out to explore the mechanism of
the transformation leading to 22.