37741-76-7

Upstream product

• 22877-14-1 2-(1,5-diphenyl-4,5-dihydro-1H-pyrazol-3-yl)-4-methyl-phenol 
• 3489-11-0 6-methylflavanone 
• 100-63-0 phenylhydrazine 
• 22219-26-7 2'-hydroxy-5'-methylchalkone dibromide 
• 29976-82-7 1-(2-hydroxy-5-methylphenyl)-3-phenylpropane-1,3-dione 
• 1775-98-0 2'-hydroxy-5'-methylchalcone 

Downstream Products

• 1421325-22-5 C₂₄H₂₃AlN₂O 

Relevant academic research and scientific papers

Aluminium complexes containing pyrazolyl-phenolate ligands as catalysts for ring opening polymerization of ε-caprolactone

A series of pyrazolyl-phenolate ligand precursors has been described. Reactions of five pyrazolyl-phenolate ligand precursors, HOPh MePzMe, HOPhMePztBu, HOPhMePzPh, HOPhMePz

Selective O-deallylation of dihydropyrazoles by molecular iodine in the presence of active N-allyl and formyl groups

Selective O-deallylation of dihydropyrazoles has been achieved by use of iodine (10 mol%) in PEG-400 as ecofriendly solvent. Iodine (10 mol%) in dimethyl sulfoxide at 100 C also afforded O-deallylation with aromatization compatible with highly reactive N-

One-pot synthesis of 1,3,5-triarylpyrazoles

A series of novel 1,3,5-triarylpyrazoles were synthesized from flavanones, arylhydrazines, and trimethyl phosphate in an one-pot procedure. Facile reaction process, easy after-reaction workshop, and good yields are the distinct characteristics of the developed protocol. The target compounds were characterized by element analysis, infrared ray (IR), 1H NMR spectra, and electrospray ionization-mass spectrometry. The structure of representative compound (C23H20N2O3, Mr = 372.42) was further confirmed by X-ray diffraction. It crystallizes in monoclinic, space group P 21/c, a = 8.9720(5), b = 24.5523(13), c = 8.9687(6) A, α = 90.0000, β = 102.6417(17), γ = 90.0000°, V = 1927.76(20) A3, Z = 4, μ(MoKα) = 0.086, F(000) = 784, Dc = 1.283 g/cm3, the final R = 0.0349 and wR = 0.0844 for 1668 observed reflections (I > 2σ(I)).

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