申请人:——
公开号:US20010056195A1
公开(公告)日:2001-12-27
The present invention relates to acetoacetic acid derivatives of the formula Ia or Ib, to processes for their preparation and to their use for the preparation of 2,15-hexadecanedione. The invention further relates to the use of the compounds of the formula Ia or Ib
1
where R is an optionally substituted straight-chain or branched C
1
-C
6
-alkyl, C
1
-C
6
-alkoxyalkyl or phenyl radical, alkoxy groups are a combination of an alkyl group according to the above definition with an oxygen atom, e.g. methoxy, ethoxy, propoxy, butoxy or pentoxy groups, which comprises adding an acetoacetic ester of the formula II
2
to 1,9-decadiene by a free-radical means, as intermediate for the preparation of muscone (3-methylcyclopentadecanone).
本发明涉及公式Ia或Ib的乙酰乙酸衍生物,以及它们的制备方法和用于制备2,15-己十二烷二酮的用途。本发明还涉及公式Ia或Ib1的化合物的用途,其中R是可选的取代直链或支链C1-C6-烷基,C1-C6-烷氧基烷基或苯基基团,烷氧基是根据上述定义的烷基基团与氧原子的组合,例如甲氧基、乙氧基、丙氧基、丁氧基或戊氧基,其包括通过自由基手段将公式II2的乙酰乙酸酯添加到1,9-癸二烯中,作为制备麝香酮(3-甲基环戊十五酮)的中间体。