申请人:Lanver Andreas
公开号:US20120209031A1
公开(公告)日:2012-08-16
The invention relates to a process for the preparation of m-substituted phenylalkanols of the formula (I)
in which R
1
is C
1
-C
5
-alkyl and R
2
, R
3
, R
4
and R
5
, independently of one another, are hydrogen or methyl, wherein a p-substituted phenylalkanol of the formula (II)
in which R
1
, R
2
, R
3
, R
4
and R
5
having the meanings given under formula (I), is isomerized in the presence of a Friedel-Crafts catalyst to give an m-substituted phenylalkanol of the formula (I). From the m-substituted phenylalkanols of the formula (I) it is possible to form, by oxidation or dehydrogenation, as products of value, the corresponding aldehydes, which are known as fragrances and aroma chemicals.
该发明涉及一种制备式(I)的m-取代苯基烷醇的方法,其中R1为C1-C5-烷基,R2、R3、R4和R5分别独立地为氢或甲基,其中在Friedel-Crafts催化剂存在下,式(I)给定的R1、R2、R3、R4和R5的含义的p-取代苯基烷醇(II)异构化为m-取代苯基烷醇(I)。通过氧化或脱氢,可以从式(I)的m-取代苯基烷醇中形成具有价值的产品,即对应的醛,这些醛被称为香料和香精化学品。