A New Synthetic Approach to Forskolin: Construction of the ABC Ring System from d-Galactose
摘要:
Intramolecular Diels-Alder reaction of dienyne 14 afforded naphthopyran 18 which underwent 1,4-addition of methyl copper reagent to give the functionalized tricyclic system of forskolin 17. The synthesis of dienyne 14 is based on a stereoselective introduction of carbon side chains at C(1) and C(2) of tri-O-acetyl-D-galactal via C-Ferrier followed by Claisen-Ireland rearrangements.
A New Synthetic Approach to Forskolin: Construction of the ABC Ring System from d-Galactose
摘要:
Intramolecular Diels-Alder reaction of dienyne 14 afforded naphthopyran 18 which underwent 1,4-addition of methyl copper reagent to give the functionalized tricyclic system of forskolin 17. The synthesis of dienyne 14 is based on a stereoselective introduction of carbon side chains at C(1) and C(2) of tri-O-acetyl-D-galactal via C-Ferrier followed by Claisen-Ireland rearrangements.
A New Synthetic Approach to Forskolin: Construction of the ABC Ring System from <scp>d</scp>-Galactose
作者:Issam Hanna、Philippe Wlodyka
DOI:10.1021/jo970999h
日期:1997.10.1
Intramolecular Diels-Alder reaction of dienyne 14 afforded naphthopyran 18 which underwent 1,4-addition of methyl copper reagent to give the functionalized tricyclic system of forskolin 17. The synthesis of dienyne 14 is based on a stereoselective introduction of carbon side chains at C(1) and C(2) of tri-O-acetyl-D-galactal via C-Ferrier followed by Claisen-Ireland rearrangements.