B. Jamartgregoire et al., EASY ACCESS TO CYCLOPENTANOID STRUCTURES .1. PREPARATION AND TRANSPOSITION OF TRICYCLO[M.N.0.0(2,M-2,3,M+2-TRIOL DERIVATIVES(1)]ALCA), Journal of organic chemistry, 58(17), 1993, pp. 4572-4578
Methylenecyclobutanols 1, conveniently obtained by 1,2-cycladiene cond
ensation of ketone enolates, were used as starting materials for the e
asy preparation of polycyclic cyclopentane derivatives. Thus, the tran
sposition and transposition-elimination of triol derivatives 3, 5, and
6 led to the synthesis of a series of polycyclic cyclopentan- or cycl
opentenones. The stereochemistries of the transpositions were studied
and mechanisms were proposed.