Sesquiterpènes et azulènes. 121<sup>e</sup>communication. Préparation et cyclisation du méthyl-3-allo-cyclogéeranyl-4-butène-2-oïque
作者:Cl. Daesslé、H. Schinz
DOI:10.1002/hlca.19560390724
日期:——
Starting from allo-cyclogeranic acid, 3-methyl-4-allo-cyclogeranylbut-2-ene-oic acid has been prepared. This monocyclic compound has been converted into a bicyclic isomer, for which a spiroeyclic structure is assigned. It represents a further new type of synthetic bicyclic sesquiterpenes.
cyclization reaction was found to depend remarkably upon the reaction temperature and the 85–94% of E-stereoselectivity was attained at −78 °C. By the method, the ochtodane derivatives with the sulfur- or oxygen-functional groups on the C(6)-position were obtained. Synthetic applications of the ochtodane type compounds (12) and (19) to the aldehyde component (4) of the pheromone of the male boll weevils and