Novel bicyclic ketones having the structure: ##STR1## wherein R is a C.sub.1 -C.sub.5 alkyl group, either straight-chain or branched, and saturated analogs have been prepared. These compounds exhibit floral and woody odors and/or desirable flavor properties, and are useful as fragrance and/or flavor materials. The compounds are conveniently prepared from alkylidene cyclopentanones by Michael addition with alkyl metalloacetoacetates and subsequent decarboxylative cyclization of the adducts. The saturated analogs may then be prepared by hydrogenation.
已经合成了具有以下结构的新型双环酮:##STR1## 其中R是C.sub.1-C.sub.5烷基,可以是直链或支链,以及饱和的类似物。这些化合物具有花香和木香气味和/或良好的风味特性,并可用作
香料和/或风味材料。这些化合物可以通过与烷基
金属
乙酰丙酮酸盐的Michael加成反应和随后的脱羧环化反应来方便地从烷基
环戊酮制备而成。然后可以通过氢化制备饱和的类似物。