申请人:Heydrich Gunnar
公开号:US20100010253A1
公开(公告)日:2010-01-14
The present invention relates to a method of working up an aluminium-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 Ar
1
, Ar
2
, Ar
3
, Ar
4
are chosen from C
6
-C
15
-aryl or C
2
-C
15
-hetero; R
1
, R
2
, R
3
, R
4
are chosen from H, C
1
-C
6
-alkyl, C
1
-C
6
-perfluoroalkyl, C
1
-C
6
-alkoxy, C
7
-C
12
-aralkyl, halogen, SiR
5b
R
6b
R
7b
, C
6
-C
10
-aryl, NR
8b
R
9b
, SR
10b
, NO
2
; and where R
1
or R
2
and/or R
3
or R
4
, together with A, can form an aromatic or nonaromatic cycle; etc.;
in which a) the aluminum-containing reaction product is subjected to distillative separation, b) the isopulegol-depleted bottom product is brought into close contact with an aqueous base and c) the ligand of the formula (I) is separated off from the organic phase, preferably by crystallization.
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
香茅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
配体,其中Ar1、Ar2、Ar3、Ar4选自C6-C15芳基或C2-C15杂环基;R1、R2、R3、R4选自H、C1-C6烷基、C1-C6
全氟烷基、C1-C6烷
氧基、C7-C12芳基烷基、卤素、SiR5bR6bR7b、C6-C10芳基、NR8bR9b、SR10b、
NO2;其中R1或R2和/或R3或R4与A一起可以形成芳香环或非芳香环等;其中a)含
铝反应产物经过蒸馏分离,b)异莪醇去除底部产物与
水性碱物质密切接触,c)式(I)的
配体从有机相中分离出来,优选通过结晶分离。此外,本发明还涉及一种生产异莪醇的方法和一种生产薄荷醇的方法。