Partial synthesis of sesquiterpene lactones: a route to 7,11-ene-13-hydroxyeudesmanolides
摘要:
An efficient partial synthesis of several sesquiterpene lactones has been carried out from costunolide by treatment with trimethyl(phenyl)ammonium perbromide. A selective bromination at the C-11 = C-13 bond provides a new route to 7,11-ene-13-hydroxyeudesmanolides. A synthesis of arbusculin D has been achieved.
Nucleophilic 1,2 addition of bromine to electron deficient double bonds by perbromide reagents
作者:Isidro G. Collado、Rosario H. Galán、Guillermo M. Massanet、Miguel S. Alonso
DOI:10.1016/s0040-4020(01)80659-1
日期:1994.1
excellent reagents for achieving nucleophilic 1,2 addition of bromine to the double bond of α,β-unsaturated compounds. This reaction proved to be highly selective in eudesmanolides with an electronegative substituent at C-1. In other subtrates with additional non-conjugated double bonds, competitive electrophilic addition of bromine can be minimized in the presence of alkenes with electron-rich double bonds