with natural sesquiterpenelactones. Three novel compounds were obtained via the Michael reaction and used for biological testing. The obtained conjugates demonstrated complex neuroprotective activities. Serotonin conjugated to isoalantolactone exhibited strong antioxidant and mitoprotective activities. The agent was also found to inhibit β-site amyloid precursor protein cleaving enzyme 1 (BACE-1), prevent
Sesquiterpenolides from Inula racemosa and their Chemical Transformations
作者:Ramandeep Kaur、K.K. Chahal、Urvashi Bhardwaj
DOI:10.14233/ajchem.2017.20254
日期:——
Inula racemosa roots are rich source of sesquiterpene lactones. Soxhlet extraction of roots using chloroform followed by column chromatography on silver nitrate impregnated silica gel led to the isolation of two sesquiterpene lactones namely alantolactone and isoalantolactone. These sesquiterpene lactones were subjected to chemical transformations using different reagents (Mg/methanol, CHBr3/KOH, LiAl[OC(CH3)3]3 and NaBH4) to afford modifications on their a-methylene-g-lactone moiety. The structures of isolated compounds and their transformation products were elucidated using spectroscopic techniques.