Total Synthesis of Natural Bicyclic Lactones (+)-Dihydrocanadensolide, (±)-Avenociolide, and (±)-Isoavenociolide via Tungsten−π-Allyl Complexes
作者:Ming-Jung Chen、Kesavaram Narkunan、Rai-Shung Liu
DOI:10.1021/jo991077c
日期:1999.10.1
tungsten-pi-allyl compounds is developed for total syntheses of natural bislactones including (+)-dihydrocanadensaolide (2), (+/-)-avenociolide (3), and (+/-)-isoavenociolide (4). Syntheses of these natural compounds are based on a common intermediate, trans-alpha-methylene butyrolactones bearing an anti-homoallylic alcohol. The kep steps in the syntheses involve an intramolecular alkoxycarbonylation of
An efficient method for total syntheses of avenaciolide and isoavenaciolide via tungsten-π-allyl complexes
作者:Kesavaram Narkunan、Rai-Shung Liu
DOI:10.1039/a803491e
日期:——
Total syntheses of avenaciolide and isoavenaciolide were achieved in six and three steps respectively based on starting chloropropargyl derivatives; the key step in such syntheses involves intramolecular alkoxycarbonylation of tungsten-η1-propargyl complexes.