1,2- And 1,2,4,5-paddlanes were successfully prepared by the intermole
cular [2 + 2] photocycloaddition of o-divinyl- and 1,2,4,5-terravinylb
enzenes, respectively. On the other hand, no desired paddlanes were ob
tained from pidivinyl- or 1,2,3-trivinylbenzene. The structural featur
es of the obtained paddlanes were examined by UV and H-1 NMR spectrosc
opy. (C) 1997 Elsevier Science Ltd.