A Chemical Study ofBurley Tobacco Flavour (Nicotiana tabacum L.) VII. Identification and synthesis of twelve irregular terpenoids, related to solanone, including 7,8-dioxabicyclo[3.2.1]octane and 4,9-dioxabicyclo[3.3.1]nonane derivatives

Twelve novel constituents isolated from Burley tobacco condensate by semi‐preparative GLC. have been identified as ( E )‐3,4‐epoxy‐5‐isopropyl‐nonane‐2,8‐dione ( A ), exo ‐(1‐methyl‐4‐isopropyl‐7,8‐dioxabicyclo[3.2.1]oct‐6‐yl)methyl ketone ( B ), exo ‐1‐(1‐methyl‐4‐isopropyl‐7,8‐dioxabicyclo[3.2.1]oct‐6‐yl)‐ethanol ( C ), ( E )‐5‐isopropyl‐8‐hydroxy‐8‐methyl‐non‐6‐en‐2‐one ( D ), ( E )‐5‐isopropyl‐6,7‐epoxy‐8‐hydroxy‐8‐methyl‐nonan‐2‐one ( E ),...