Terpenes and Terpene Derivatives, XXXI. New Bisabolene Derivatives and a Salsolene Ketone from <i>Artemisia sieberi</i> Bess.

Abstract

Abstract From the essential oil of Artemisia sieberi growing near Tehran some new bisabolene derivatives could be isolated. The structures of (−)‐dehydro‐1,8‐sesquicineole ( 1 ), ( E )‐dehydro‐1,8‐sesquicineol‐12‐yl acetate ( 4 ), bisabola‐2,11‐dien‐10‐one inner 1,7‐acetal ( 14 ) and salsolene ketone 15 could be established by their 1 H‐ and 13 C‐NMR spectra. Sesquiphellandren‐7‐ol ( 11 ), a trace constituent of the oil, was identified by a comparison of its 1 H‐NMR spectrum with that of sesquiphellandren‐9‐ol (bisacurol).