Ca. Dvorak et Vh. Rawal, SYNTHESIS OF THE NATURALLY-OCCURRING [3.3.3]PROPELLANE (+ -)-MODHEPHENE FEATURING A PHOTOCYCLOADDITION REDUCTIVE FRAGMENTATION DIQUINANE CONSTRUCTION/, Chemical communications, (24), 1997, pp. 2381-2382
Modhephene has been synthesized in 11 steps and 21% overall yield from
cyclopentadiene, by a stereoselective route that features a photocycl
oaddition-fragmentation sequence for the construction of the diquinane
core.