发明名称 |
P-cymenol preparation by transfer dehydrogenation. |
摘要 |
<p>The invention relates to a process for the conversion of 8-hydroxymenthenes into 8-hydroxycymenes by reacting the 8-hydroxymenthenes in the liquid phase in the presence of a dehydrogenation catalyst, e.g. palladium and a hydrogen acceptor e.g. mesityl oxide. The process is preferably carried out at 80-150 DEG C and in the presence of base. The process is particularly suitable for converting 8-hydroxy-p-menth-1-ene into 8-hydroxy-p-cymene. The reaction products are of value as intermediates in the preparation of fragrance chemicals.</p> |
申请公布号 |
EP0416683(A1) |
申请公布日期 |
1991.03.13 |
申请号 |
EP19900202241 |
申请日期 |
1990.08.21 |
申请人 |
QUEST INTERNATIONAL B.V.;UNILEVER N.V. |
发明人 |
MOTION, KEITH ROBERT;NEWMAN, CHRISTOPHER PAUL |
分类号 |
B01J23/44;C07B61/00;C07C29/00;C07C33/20 |
主分类号 |
B01J23/44 |
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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