Stereoselective Synthesis of 7,11-Guaien-8,12-olides from Santonin. Synthesis of Podoandin and (+)-Zedolactone A
作者:Gonzalo Blay、Victoria Bargues、Luz Cardona、Begoña García、José R. Pedro
DOI:10.1021/jo000927h
日期:2000.10.1
4alpha-epoxide 15. The basic hydrolysis of the 10-acetyl group in compound 18 took place with concomitant intramolecularconjugatedaddition of the alkoxide to the butenolide moiety to give ether 19. Cleavage of the 7,10-oxido bridge via the lactone enolate afforded (+)-zedolactone A (ent-6). This synthesis has allowed for the establishment of the absolute stereochemistry of natural zedolactone A as the enantiomer
Synthetic studies toward natural furanosesquiterpenoids from santonin. Synthesis of (+)-1,2-dihydrotubipofuran
作者:Luz Cardona、Begoña García、José R. Pedro、Desamparados Ruiz
DOI:10.1016/s0040-4020(01)80707-9
日期:1994.5
Santonin (1) was converted into (+)-1,2-dihydrotubipofuran (13) via a synthetic pathway involving a very easy preparation of 7,11-ene-8,12-olide and 8,12-furan moieties and A-ring elaboration on the eudesmane framework.
Functionality transfer from C6 to C8 in sesquiterpenes. Synthesis of 8-epi-ivangustin and 8-epi-isoivangustin from santonin
作者:Gonzalo Blay、M. Luz Cardona、Begona Garcia、Jose R. Pedro
DOI:10.1021/jo00021a040
日期:1991.10
The short-range functionality transfer from C6 to C8 in eudesmane framework was reported. Santonin (1) was converted into 8-epi-ivangustin (16) and 8-epi-isoivangustin (18) via a synthetic pathway involving the aforementioned functionality transfer and treatment of an intermediate diselenide 9 with m-CPBA.