Three new irregular sesquiterpenoids were isolated and characterized, along with epi-brasilenol, from the Mediterranean red alga Laurencia obtusa. They possess the unusual skeleton of brasilane and one of them contains the unprecedented 5,6-double bond (instead of a 1,6-double bond). Their structures were determined by detailed spectral analysis. The relative configurations were assigned by NOESY spectroscopy, molecular mechanics calculations (MM2) and, in one case, by a quantitative computer simulation of the lanthanide induced shifts in the H-1 NMR spectrum.

BRASILANE-TYPE SESQUITERPENOIDS FROM THE MEDITERRANEAN RED ALGA LAURENCIA-OBTUSA

AMICO, Vincenzo;
1991

Abstract

Three new irregular sesquiterpenoids were isolated and characterized, along with epi-brasilenol, from the Mediterranean red alga Laurencia obtusa. They possess the unusual skeleton of brasilane and one of them contains the unprecedented 5,6-double bond (instead of a 1,6-double bond). Their structures were determined by detailed spectral analysis. The relative configurations were assigned by NOESY spectroscopy, molecular mechanics calculations (MM2) and, in one case, by a quantitative computer simulation of the lanthanide induced shifts in the H-1 NMR spectrum.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11769/250736
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 16
  • ???jsp.display-item.citation.isi??? ND
social impact