申请人:Heydrich Gunnar
公开号:US20100016642A1
公开(公告)日:2010-01-21
The present invention relates to a method of working up an aluminum-containing reaction product from the production of isopulegol by cyclization of citronellal in the presence of complex compounds, comprising at least one ligand of the formula (I),
where R
1
, R
2
, R
3
are chosen from hydrogen, halogen, nitro, C
1
-C
8
-alkyl, C
1
-C
8
-alkoxy, di(C
1
-C
4
-alkyl)amino and aryl; R
4
, R
5
are chosen from halogen, nitro, C
1
-C
8
-alkyl, C
1
-C
8
-alkoxy, di(C
1
-C
4
-alkyl)amino, aryl or heteroaryl;
in which a) the reaction product is subjected to distillative separation to obtain an isopulegol-enriched top product and an isopulegol-depleted bottom product and b) the ligand of the formula (I) is separated off from the bottom product.
Moreover, the invention relates to a method of producing isopulegol, and to a method of producing menthol.
本发明涉及一种从在复合物存在下环化柠檬醛制备异莪醇的反应产物中处理含铝反应产物的方法,所述复合物至少包括式(I)的一个配体,其中R1、R2、R3来自氢、卤素、硝基、C1-C8烷基、C1-C8烷氧基、二(C1-C4烷基)氨基和芳基;R4、R5来自卤素、硝基、C1-C8烷基、C1-C8烷氧基、二(C1-C4烷基)氨基、芳基或杂环芳基;其中a)反应产物经过蒸馏分离,获得富含异莪醇的顶部产物和贫含异莪醇的底部产物,b)式(I)的配体从底部产物中分离出来。此外,本发明还涉及一种制备异莪醇的方法,以及一种制备薄荷醇的方法。