Title:
光学活性メントールの製造方法
Document Type and Number:
Japanese Patent JP5780933
Kind Code:
B2
Abstract:
An object of the present invention is to provide a method for manufacturing an optically active menthol having fewer steps, which generates less environmentally polluting waste because a catalytic reaction is involved in all of the steps, and is capable of saving a production cost. The present invention relates to a method for manufacturing an optically active menthol, including the following steps: A-1) asymmetrically hydrogenating at least one of geranial and neral to thereby obtain an optically active citronellal, B-1) conducting a ring-closure reaction of the optically active citronellal in the presence of an acid catalyst to thereby obtain an optically active isopulegol, and C-1) hydrogenating the optically active isopulegol to thereby obtain an optically active menthol.
Inventors:
Maeda Hironori
Ito
Shinya Yamada
Yohori Hori
Ito
Shinya Yamada
Yohori Hori
Application Number:
JP2011262574A
Publication Date:
September 16, 2015
Filing Date:
November 30, 2011
Export Citation:
Assignee:
Takasago International Corporation
International Classes:
C07C29/17; B01J31/22; B01J31/28; C07C29/156; C07C35/12
Domestic Patent References:
| JP2008515843A | ||||
| JP2009528307A |
Foreign References:
| WO2009068444A1 | ||||
| WO2009144906A1 | ||||
| WO2010061909A1 |
Attorney, Agent or Firm:
Patent business corporation glory patent office
Hironori Honda
Toshimitsu Ichikawa
Hironori Honda
Toshimitsu Ichikawa
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