86691-10-3

Upstream product

• 86691-09-0 2-[5-(4-Chloro-phenyl)-1-phenyl-4,5-dihydro-1H-pyrazol-3-yl]-4-methyl-phenol 
• 16635-10-2 1-(p-chlorophenyl)-3-(2-hydroxy-5-methylphenyl)prop-1-en-3-one 
• 100-63-0 phenylhydrazine 
• 75227-44-0 2'-Hydroxy-5'-methyl-4-chlorochalkone α,β-dibromide 

Relevant academic research and scientific papers

Synthesis of pyrazole and isoxazole in triethanolamine medium

Reactions of 2′-hydroxy chalcone dibromides 2a-1 with phenyl hydrazine and hydrazine hydrate afford pyrazoles 1a-1 and with hydroxylamine hydrochloride give isoxazoles 5a-f in triethanolamine medium. Similarly reaction of β-diketone 3b-e with phenyl hydra

Lead Tetraacetate Oxidation of 1,3-Triaryl-5-hydroxyphenyl-pyrazolines

Lead tetraacetate oxidation of the title pyrazolines (Ia-d) leads to the pyrazoles (IIa-d) in which OH group in the 5-aryl moiety remains intact.Structures of pyrazoles (IIa-d) have been confirmed by elemental analyses and spectral data.

SYNTHESIS OF SOME ISOMERIC PYRAZOLES

The syntheses of 3-o-hydroxyphenyl-1,5-diphenylpyrazoles (III) and 1,3-diphenyl-5-o-hydroxyphenylpyrazoles (V) by the oxidation of corresponding pyrazolines (II) with manganese dioxide and by the reaction of phenylhydrazine with 2'-hydroxychalcone dibromi