申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US20200199053A1
公开(公告)日:2020-06-25
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, MgZ
1
, or ZnZ
1
, wherein Z
1
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-壬酮的方法,该方法包括至少一步,即将下式(1)的戊酸酐和下式(2)的2-戊基亲核试剂进行亲核取代反应,以产生4-甲基-5-壬酮(3),以及一种制备下式(7)的4-甲基-5-壬醇的方法,该方法包括至少以下步骤:制备4-甲基-5-壬酮并将所得的4-甲基-5-壬酮和还原剂进行还原反应以产生4-甲基-5-壬醇(7)。