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.
The first synthesis of 3-(dichloroacetyl)chromone from 3-(dimethylamino)-1-(2-hydroxyphenyl)propen-1-one and dichloroacetyl chloride is described. The reaction of electron-rich aminoheterocycles with 3-(dichloroacetyl)chromone provides a set of diverse fused pyridines bearing the CHCl2-substituent at the α-position of the pyridine core. Subsequent hydrolysis leads to the formation of annulated α-(formyl)pyridines
描述了由3-(二甲基氨基)-1-(2-羟基苯基)丙烯-1-酮和二氯乙酰氯首次合成3-(二氯乙酰基)色酮。富电子的氨基杂环与3-(二氯乙酰基)色酮的反应提供了一组不同的稠合吡啶,其在吡啶核的α-位带有CHCl 2-取代基。随后的水解导致环状的α-(甲酰基)吡啶的形成。 3-(二氯乙酰基)色酮-4 H -1-苯并吡喃-4-酮-杂环胺-稠合吡啶-环化反应
Process for the production of pyrazoles
申请人:Syngenta Participations AG
公开号:EP2008996A1
公开(公告)日:2008-12-31
The present invention relates to novel processes for the production of compounds of formula I
本发明涉及一种新型的制备化合物I的方法。
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.
The present invention relates to novel processes for the production of compounds of formula (I) wherein Hal and Hal′ are independently Cl or F, and R
1
is H, Cl or F.