The synthesis of pentaoxa[5]peristylanes, a novel oxa-cage system, has
been accomplished via ozonolysis of anti-2,3-bis-endo-triacylbicyclo[
2.2.1]-5-heptenes and via a direct chemical transformation of the tetr
aacetal tetraoxa-cages 5a-c and 6a-c. (C) 1997 Elsevier Science Ltd.