Cyclisation von 3,6-Dimethyl-3-carbohydroxy-heptadien-(1,5), einer Terpensäure mit dem Skelett des Artemesiaketons
作者:L. Re、H. Schinz
DOI:10.1002/hlca.19580410624
日期:——
3,6-Dimethyl-3-carbohydroxy-hepta-1,5-diene, a new isomer of geranic acid, characterized by the skeleton of artemisia ketone, has been synthesized. The corresponding alcohol and aldehyde have also been prepared and compared with geraniol and citral respectively.
variety of a-geranyl-substituted carbonyl compounds to afford 1,2,3,4,4a,5,6,7-octahydronaphthalen-2-ols in moderate to good yields. In certain cases, the diastereoselection is remarkable. The dicyclization occurs by a 1,5-diene cyclization on the geranyl moiety to form selectively γ-cyclogeranyl-substituted carbonyl compounds, which further cyclizethrough an intermolecular carbonyl-ene reaction.