The cyclic Isolongifolanone ketals of the general formula A wherein the wavy lines mean .alpha.- and .beta.-configuration and R,R' mean radicals of hydrogen, methyl or ethyl, are new. With preference they are used either as odorants or as components of perfume compositions. They are manufactured from Isolongifolene which is itself produced from Longifolene as is well known. Isolongifolene is oxydized to Isolongifolene-3-on and this is reacted with aliphatic 1,2-diols in apolar solvents with the separation of water.
一般式为A的环状Isolongifolanone ketal是新的,其中波浪线表示α-和β-构型,R、R'表示氢、甲基或乙基基团。它们通常用作香气剂或香
水组分。它们是从众所周知的Longifolene生产的Isolongifolene制造而成。Isolongifolene被氧化为Isolongifolene-3-one,然后在无极性溶剂中与脂肪族1,2
-二醇反应,分离
水后得到。