Abstract
Glycosylation of 12 β-acetoxy-dammar-24-en-3β,20( S)-diol ( 4), with hepta- O-acetyl-α-sophorosyl bromide ( 5) under catalysis by Ag 2CO 3 or Ag 2O afforded a chromatographically unseparated mixture of the α- and β-linked octaacetates 6 and 7 in an approximately 2.5:1 ratio. After deprotection and chromatographic purification, the free α- ( 8) and β-glycosides ( 9) were obtained. Sophoroside 9 was identical in all respects with ginsenoside Rg 3, the minor component of Ginseng Radix rubra. All compounds were fully characterized by 1H and 13C NMR spectroscopy.
Full Text
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call