Method for the Production of N-Substituted (3-Dihalomethyl-1-Methyl-Pyrazole-4-yl) Carboxamides
申请人:Zierke Thomas
公开号:US20100174094A1
公开(公告)日:2010-07-08
The present invention relates to a process for preparing N-substituted (3-dihalomethylpyrazol-4-yl)carboxamides of the formula (I)
in which R
1
is optionally substituted phenyl or C
3
-C
7
-cycloalkyl, R
1a
is hydrogen or fluorine, or R
1a
together with R
1
is optionally substituted C
3
-C
5
-alkanediyl or C
5
-C
7
-cycloalkanediyl, R
2
is C
1
-C
6
-alkyl, C
2
-C
6
-alkenyl, C
2
-C
6
-alkynyl or C
1
-C
4
-alkoxy-C
1
-C
2
-alkyl, X is F or Cl and n is 0, 1, 2 or 3; which comprises
A) providing a compound of the formula (II)
in which X is F or Cl, Y is Cl or Br and R
2
has one of the meanings given above and
B) reacting a compound of the formula (II) with carbon monoxide and a compound of the formula (III)
in which R
1
, R
1a
and n have one of the meanings given above; in the presence of a palladium catalyst;
to intermediates used for the preparation according to the process according to the invention, and also to processes for their preparation.
本发明涉及一种制备式(I)的N-取代(3-二卤甲基吡唑-4-基)羧酰胺的方法
其中R1是可选的取代苯基或C3-C7环烷基,R1a是氢或氟,或者R1a与R1一起是可选的取代C3-C5-烷二基或C5-C7-环烷二基,R2是C1-C6-烷基,C2-C6-烯基,C2-C6-炔基或C1-C4-烷氧基-C1-C2-烷基,X是F或Cl,n为0、1、2或3;包括
A)提供式(II)的化合物
其中X是F或Cl,Y是Cl或Br,R2具有上述给定的含义之一
B)将式(II)的化合物与一氧化碳和式(III)的化合物反应
其中R1、R1a和n具有上述给定的含义之一;在钯催化剂的存在下;
用于根据本发明的方法制备的中间体,以及用于它们的制备的方法。