申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US10882806B2
公开(公告)日:2021-01-05
The present invention provides a process for preparing 4-methyl-5-nonanone of the following formula (3), the process comprising at least a step of subjecting pentanoic anhydride of the following formula (1) and a 2-pentyl nucleophilic reagent of the following general formula (2), in which M represents Li, MgZ1, or ZnZ1, wherein Z1 represents a halogen atom or a 2-pentyl group, to a nucleophilic substitution reaction to produce 4-methyl-5-nonanone (3), as well as a process for preparing 4-methyl-5-nonanol of the following formula (7), the process comprising at least steps of preparing 4-methyl-5-nonanone and subjecting the obtained 4-methyl-5-nonanone and a reducing agent to a reduction reaction to produce 4-methyl-5-nonanol (7).
本发明提供了一种制备下式(3)的 4-甲基-5-壬酮的工艺,该工艺至少包括将下式(1)的戊酸酐和下通式(2)的 2-戊基亲核试剂(其中 M 代表 Li、MgZ1 或 ZnZ1,其中 Z1 代表卤素原子或 2-戊基)进行亲核取代反应的步骤,以及制备下式(7)的 4-甲基-5-壬醇的工艺,该工艺包括的亲核试剂进行亲核取代反应,生成 4-甲基-5-壬酮 (3),以及制备下式 (7) 的 4-甲基-5-壬醇的工艺,该工艺至少包括以下步骤:制备 4-甲基-5-壬酮,以及将得到的 4-甲基-5-壬酮和还原剂进行还原反应,生成 4-甲基-5-壬醇 (7)。