Total Syntheses of Racemic, Natural (−) and Unnatural (+) Glyceollin I
作者:Rahul S. Khupse、Paul W. Erhardt
DOI:10.1021/ol802112r
日期:2008.11.6
The first totalsyntheses of racemic glyceollin I and its enantiomers are described. A Wittig approach was utilized as an entry to the appropriately substituted isoflav-3-ene so that an osmium tetroxide mediated asymmetric dihydroxylation could be deployed for stereospecific introduction of the 6a-hydroxy group. While using triphenylphosphine hydrobromide, a novel method was found for gently removing