Synthesis of paddlanes possessing cyclophane shaft and cyclobutane blades

Article abstract of DOI:10.1016/S0040-4020(97)00171-3

1,2- And 1,2,4,5-paddlanes were successfully prepared by the intermolecular [2 + 2] photocycloaddition of o-divinyl- and 1,2,4,5-tetravinylbenzenes, respectively. On the other hand, no desired paddlanes were obtained from p-divinyl- or 1,2,3-trivinylbenze