P. Jankowski et al., A FACILE METHOD FOR PREPARATION OF FUNCTIONALIZED CYCLOPROPENE DERIVATIVES - SYNTHESIS OF CYCLOPROPENE-RELATED ALLYLIC AND HOMOALLYLILIC ALCOHOLS, Synlett, (8), 1995, pp. 866-868
Free-radical addition of iodoalkyl sulphones 1 to vinylsilanes 2 affor
ded adducts 3 regioselectively. The adducts were cyclized to give cycl
opropanes 4 and then transformed into the cyclopropene derivatives 5.
Addition of iodomethyl phenyl sulphone (6) to triphenylvinlylsilane 7
followed by cyclization of the adduct provided cyclopropane 8. The lat
ter was reacted with representative alkylating agents to afford the co
rresponding products 11 and 12. Alcohol 12a was transformed into cyclo
propen-related allylic alcohol 14b.