756430-74-7

Basic information

• Product Name: 1H-Pyrazole,3-(dichloromethyl)-(9CI)
• Synonyms: 1H-Pyrazole,3-(dichloromethyl)-(9CI)
• CAS NO: 756430-74-7
• Molecular Formula: C4H4Cl2N2
• Molecular Weight: 150.99396
• Product Categories: METHYL
• Mol File: 756430-74-7.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 1H-Pyrazole,3-(dichloromethyl)-(9CI)(CAS DataBase Reference)
• NIST Chemistry Reference: 1H-Pyrazole,3-(dichloromethyl)-(9CI)(756430-74-7)
• EPA Substance Registry System: 1H-Pyrazole,3-(dichloromethyl)-(9CI)(756430-74-7)

Safety Data

• Hazardous Substances Data: 756430-74-7(Hazardous Substances Data)

Upstream product

• 83124-75-8 1,1-dichloro-4-ethoxy-but-3-en-2-one 
• 83124-82-7 1,1-Dichlor-4,4-diethoxy-2-butanon 

Downstream Products

• 1007468-17-8 3-(difluoromethyl)-1H-pyrazole 

Relevant articles and documents

Method for the Production of N-Substituted (3-Dihalomethyl-1-Methyl-Pyrazole-4-yl) Carboxamides

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.