The First Synthetic Route to Furostan Saponins.

Abstract 26- O -β- d -Glucopyranosyl-22-methoxy-25( R )-furost-5-en-3β-ol 3- O -β- d -glucopyranoside is synthesized from diosgenin in 11 steps and 26% overall yield. The present synthetic route represents the first one to furostan saponins.