Ontology highlight
ABSTRACT:
SUBMITTER: Yang J
PROVIDER: S-EPMC4285456 | biostudies-literature | 2015 Jan
REPOSITORIES: biostudies-literature
Yang Jingyue J Knueppel Daniel D Cheng Bo B Mans Douglas D Martin Stephen F SF
Organic letters 20141216 1
Hexacyclic xanthone natural products such as IB-00208 present a formidable challenge in organic synthesis. A new approach to polycyclic 1,4-dioxygenated xanthones from benzocyclobutenones has been developed and applied to the first total synthesis of the aglycone of IB-00208. The 22-step synthesis features an acetylide stitching process that joins an aryl aldehyde with an angularly fused benzocyclobutenone, which was prepared by a ring-closing metathesis reaction. The resulting acetylenic benzoc ...[more]