申请人:——
公开号:US20040039220A1
公开(公告)日:2004-02-26
The invention relates to a process for the preparation of compounds of the formula
1
or, if appropriate, a tautomer thereof, in each case in the free form or in salt form, in which A, X, Y, Z, R
2
, R
3
, R
4
, R
5
, R
7
, R
9
and n are as defined in claim 1 and the C═N double bond marked with E has the E configuration, which comprises
a1) reacting either a compound of the formula (II) mentioned above with a compound of the formula (III) mentioned above, in which X
1
is a leaving group, or
a2) a compound of the formula (IV) mentioned above, if appropriate in the presence of a base, with a compound of the formula (V) mentioned above, or
b1) reacting a compound of the formula (VI) mentioned above with a compound of the formula R
7
-A-X
2
(VII), in which X
2
is a leaving group, and either further reacting the compound thus obtainable, of the formula (IV), for example according to method a2), or
b2) reacting it with hydroxylamine or a salt thereof, if appropriate in the presence of a basic or acid catalyst, and further reacting the compound thus obtainable, of the formula (II), for example according to method a1), or
c) reacting a compound of the formula (VIII), mentioned above with a C
1
-C
6
alkyl nitrite and further reacting the compound thus obtainable, of the formula (VI), for example according to method b), the E isomers of the compounds of the formulae (II), (IV) and (VI), a process for their preparation and their use for the preparation of compounds of the formula (I).
本发明涉及一种制备式1化合物或其互变异构体的过程,其中A、X、Y、Z、R2、R3、R4、R5、R7、R9和n如权利要求1所定义,标有E的C═N双键具有E构型,包括以下步骤:a1)将上述式II化合物与上述式III化合物反应,其中X1是离去基团,或a2)将上述式IV化合物与上述式V化合物反应,如有必要,在碱的存在下,或b1)将上述式VI化合物与上述式R7-A-X2(VII)化合物反应,其中X2是离去基团,并进一步反应所得化合物,例如根据方法a2)制备的上述式IV化合物,或b2)将其与羟胺或其盐反应,如有必要,在酸催化剂或碱催化剂存在下,并进一步反应所得化合物,例如根据方法a1)制备的上述式II化合物,或c)将上述式VIII化合物与C1-C6烷基亚硝酸盐反应,并进一步反应所得化合物,例如根据方法b)制备的上述式VI化合物,式II、IV和VI化合物的E异构体,其制备方法以及它们用于制备式I化合物的用途。