Synthesis of the Core Structure of Daphnimacropodines

Org Lett. 2019 Jun 7;21(11):4309-4312. doi: 10.1021/acs.orglett.9b01486. Epub 2019 May 29.

Abstract

Daphniphyllum alkaloids daphnimacropodines A-C possess a highly congested ring system and share a common tetracyclic ring skeleton. To access the challenging chemical structure of daphnimacropodines, a divergent synthetic approach toward their total synthesis is described. A stereoselective synthesis of the core structure of daphnimacropodines has been achieved from a simple diketone building block. Our approach features an intramolecular carbamate aza-Michael addition and a hydropyrrole synthesis via a Au-catalyzed alkyne hydration followed by an aldol condensation, whereas all the other attempts failed.

Publication types

  • Research Support, Non-U.S. Gov't