Method for the production of N-substituted (3-dihalomethyl-1-methylpyrazol-4-yl) carboxamides
申请人:BASF SE
公开号:US08153820B2
公开(公告)日:2012-04-10
The present invention relates to a process for preparing N-substituted (3-dihalomethylpyrazol-4-yl)carboxamides of the formula (I)
in which R1 is optionally substituted phenyl or C3-C7-cycloalkyl, R1a is hydrogen or fluorine, or R1a together with R1 is optionally substituted C3-C5-alkanediyl or C5-C7-cycloalkanediyl, R2 is C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkynyl or C1-C4-alkoxy-C1-C2-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 R2 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 R1, R1a 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是可选取代的苯基或C3-C7环烷基,R1a是氢或氟,或者R1a与R1一起是可选取代的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。该方法包括:A)提供式(II)的化合物,其中X为F或Cl,Y为Cl或Br,R2具有上述给定的含义;和B)在钯催化剂的存在下,将式(II)的化合物与一种式(III)的化合物反应,其中R1,R1a和n具有上述给定的含义,以制备用于根据本发明方法的制备的中间体,以及用于它们的制备的方法。