发明名称 |
METHOD FOR MANUFACTURING OPTICALLY ACTIVE MENTHOL |
摘要 |
<p>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.</p> |
申请公布号 |
EP2647616(A1) |
申请公布日期 |
2013.10.09 |
申请号 |
EP20110844547 |
申请日期 |
2011.12.01 |
申请人 |
TAKASAGO INTERNATIONAL CORPORATION |
发明人 |
MAEDA HIRONORI;ITOH HISANORI;YAMADA SHINYA;HORI YOJI |
分类号 |
C07C29/17;B01J21/18;B01J23/44;B01J25/02;B01J31/14;B01J31/28;C07B53/00;C07B61/00;C07C29/132;C07C29/56;C07C35/12 |
主分类号 |
C07C29/17 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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