申请人:Kao Corporation
公开号:EP2487150A1
公开(公告)日:2012-08-15
The present invention relates to a process for producing 2-alkylcycloalkanones with a high yield and a high purity. In addition, the present invention also relates to a process for producing lactones as a useful perfume material for cosmetics, flavors, etc. More specifically, the present invention relates to a process for producing a 2-alkylcycloalkanone represented by the following general formula (2) which includes the step of subjecting a 2-(1-hydroxyalkyl)-cycloalkanone to dehydration and hydrogenation reaction in a flow of a hydrogen gas under a pressure of from 20 to 200 kPa (absolute pressure) in the presence of an acid and a platinum group metal catalyst; and a process for producing a lactone which includes the step of subjecting the 2-alkylcycloalkanone to oxidation reaction using a percarboxylic acid:
wherein n is an integer of 1 or 2; and R1 and R2 are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms with the proviso that R1 and R2 may form a ring through a carbon atom adjacent thereto.
本发明涉及一种以高产率和高纯度生产 2-烷基环烷酮的工艺。此外,本发明还涉及一种生产内酯的工艺,这种内酯是一种有用的香水材料,可用于化妆品、香精等。更具体地说,本发明涉及一种生产由以下通式(2)代表的 2-烷基环烷酮的工艺,该工艺包括以下步骤:在一种酸和一种铂族金属催化剂存在下,使 2-(1-羟基烷基)-环烷酮在压力为 20 至 200 kPa(绝对压力)的氢气流中进行脱水和氢化反应;以及一种生产内酯的工艺,其中包括使用过羧酸使 2-烷基环烷酮进行氧化反应的步骤:
其中n为1或2的整数;R1和R2各自独立地为氢原子或具有1至8个碳原子的烷基,但R1和R2可通过相邻的碳原子形成环。