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.
Trimethyl(phenyl)ammonium perbromide, an efficient reagent for the partial synthesis of functionalized sesquiterpene lactones
作者:Isidro G Collado、José G Madero、Guillermo M Massanet、Francisco R Luis
DOI:10.1016/0040-4039(90)87035-x
日期:1990.1
Brominative carbocyclization of costunolide by trimethyl(phenyl)ammonium perbromide in pyridine leads to the eudesmanolides , and . Regio and stereospecificaddition of bromine to the 11, 13-double bond also occurs providing a useful route to C-7, C-11 and C-13 functionalized sesquiterpene lactones. Dehydrobromination of 1-β-bromocyclocostunolide occurs via epimerization at C-1.