Synthesis of (+)-Didemniserinolipid B via Ketalization/Ring-Closing Metathesis
作者:Christopher C. Marvin、Eric A. Voight、Steven D. Burke
DOI:10.1021/ol702454m
日期:2007.12.1
A modular synthesis of didemniserinolipid B is reported. Central to this synthesis was the use of a ketalization/ring-closing metathesis (K/RCM) strategy to establish the 6,8-dioxabicyclo[3.2.1]octane core. The C10 axial alcohol was established via a selective epoxidation, followed by reductive trans-diaxial epoxide opening. The serinol and unsaturated ester side chains were introduced by a Williamson etherification and cross metathesis, respectively.
Synthesis of (+)-Didemniserinolipid B: Application of a 2-Allyl-4-fluorophenyl Auxiliary for Relay Ring-Closing Metathesis
作者:Christopher C. Marvin、Eric A. Voight、Judy M. Suh、Christopher L. Paradise、Steven D. Burke
DOI:10.1021/jo801666t
日期:2008.11.7
work, a novel 2-allyl-4-fluorophenyl auxiliary for relay ring-closing metathesis (RRCM) was developed, which increased the yield of the RCM. The resulting 6,8-dioxabicyclo[3.2.1]octene core was selectively functionalized by complimentary dihydroxylation and epoxidation routes to install the C10 axial alcohol. This bicyclic ketal core was further functionalized by etherification and an alkene cross metathesis