293315-44-3

Upstream product

• 60798-13-2 2-phenyl-5-(4'-chloro-phenyl)-2,4-dihydro-3H-pyrazol-3-one 
• 1073-69-4 N-4-chlorophenylhydrazine 
• 94-02-0 ethyl 3-oxo-3-phenylpropionate 

Downstream Products

• 63637-57-0 1-(4-chlorophenyl)-3-phenyl-1H-pyrazole 
• 27293-99-8 1-(4-chlorophenyl)-5-(4-methoxyphenyl)-3-phenyl-1H-pyrazole 

Relevant academic research and scientific papers

Palladium-catalyzed dehalogenation of 5-halopyrazoles

A new and efficient method for the dehalogenation of 5-halopyrazoles was developed by using the catalytic amount of palladium (II) chloride and triphenylphosphine as a ligand at reflux under constant flow of hydrogen gas. The reaction gave the correspondi

Cross-coupling of 1-aryl-5-bromopyrazoles: Regioselective synthesis of 3,5-disubstituted 1-arylpyrazoles

The cross-coupling of 1-aryl-5-bromopyrazoles 4 with alkynes, vinyltins and arylboronic acids promoted by Pd(PPh3)4 afforded unsymmetrical 3,5- disubstituted 1-arylpyrazoles 5-8 in excellent yields, 1-Aryl-5- bromopyrazoles 4 were prepared from their corresponding 1-arylpyrazolones 3 with PBr3 in refluxing acetonitrile. (C) 2000 Elsevier Science Ltd.