Process for preparing 3-dihalomethylpyrazole-4-carboxylic...

Details Process for preparing 3-dihalomethylpyrazole-4-carboxylic... Process for preparing 3-dihalomethylpyrazole-4-carboxylic...

C - Chemistry, Metallurgy

07

D

C07D 231/14 (2006.01)

Patent

CA 2661407

The invention relates to a process for preparing 3-dihalomethylpyrazole-4-carboxylic acid derivatives of the formula (I) by reacting .alpha.-fluoroamines of the formula (III), in the presence of Lewis acids, with acrylic acid derivatives of the formula (II) to give vinamidinium salts of the formula (IV) and subsequently reacting them with hydrazines, and to the vinamidinium salts of the formula (IV) themselves.

L'invention concerne un procédé de fabrication de dérivés d'acide 3-dihalogénométhyl-pyrazol-4-carboxylique de formule (I) par réaction de .alpha.-fluoroamines de formule (III) en présence d'acides de Lewis avec des dérivés d'acide acrylique de formule (II) pour former des sels de vinamidinium de formule (IV) et par leur réaction ultérieure avec des hydrazines, ainsi que les sels de vinamidinium de formule (IV) eux-mêmes.

Affiliated with

Also associated with

Rating

Process for preparing 3-dihalomethylpyrazole-4-carboxylic... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing 3-dihalomethylpyrazole-4-carboxylic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing 3-dihalomethylpyrazole-4-carboxylic... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-2033256