Rt. Lewis et al., AN IMPROVED PREPARATION OF DIPHENYLMETHYLENECYCLOPROPANES AND THEIR USE IN INTRAMOLECULAR PALLADIUM-CATALYZED [3+2] CYCLOADDITIONS, Tetrahedron, 51(11), 1995, pp. 3289-3302
The synthesis and intramolecular palladium catalysed cycloaddition rea
ctions of diphenylmethylenecyclopropanes 1 and 2 containing olefinic a
nd acetylenic acceptors are described This strategy provides a useful
entry into some highly functionalised bicyclo[3.3.0]octane systems.