1242853-39-9

Basic information

• Product Name: 3-methyl-1-phenyl-4-(phenyldiazenyl)-1H-pyrazol-5-ol
• Synonyms: 3-methyl-1-phenyl-4-(phenyldiazenyl)-1H-pyrazol-5-ol
• CAS NO: 1242853-39-9
• Molecular Weight: 278.313
• Mol File: 1242853-39-9.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 3-methyl-1-phenyl-4-(phenyldiazenyl)-1H-pyrazol-5-ol(CAS DataBase Reference)
• NIST Chemistry Reference: 3-methyl-1-phenyl-4-(phenyldiazenyl)-1H-pyrazol-5-ol(1242853-39-9)
• EPA Substance Registry System: 3-methyl-1-phenyl-4-(phenyldiazenyl)-1H-pyrazol-5-ol(1242853-39-9)

Safety Data

• Hazardous Substances Data: 1242853-39-9(Hazardous Substances Data)

Upstream product

• 141-97-9 ethyl acetoacetate 
• 100-63-0 phenylhydrazine 
• 2009-97-4 ethyl 2-diazo-3-oxobutanoate 

Downstream Products

• 881-05-0 3-Methyl-1-phenyl-2-pyrazoline-4,5-dione 
• 92-52-4 biphenyl 
• 95-57-8 2-monochlorophenol 
• 108-90-7 chlorobenzene 
• 71-43-2 benzene 
• 108-95-2 phenol 

Relevant articles and documents

Azopyrazole compounds and novel synthetic method thereof by silver catalysis

The present invention relates to an azopyrazole compound and a novel synthesis method thereof by silver catalysis. More specifically, a one-pot synthesis method using silver (Ag) catalysis of andalpha;-diazo-andbeta;-keto ester and arylhydrazine has an advantage of efficiently synthesizing various types of azopyrazole having multiple functions, and the azopyrazole synthesized by the above-described synthesis method can be widely used for the synthesis of natural materials andmedicines, or for dyestuff industry.COPYRIGHT KIPO 2018

Construction of Multifunctionalized Azopyrazoles by Silver- Catalyzed Cascade Reaction of Diazo Compounds

A variety of multisubstituted azopyrazoles were synthesized in good yield from an efficient one-pot silver trifluoromethanesulfonate (AgOTf)-catalyzed cascade reaction of α-diazo-β-keto esters with two arylhydrazines or two arylhydrazine hydrochlorides. This cascade reaction included pyrazolone formation, NH insertion, and oxidation. For the synthesis of more diverse azopyrazoles bearing two different aromatic rings, the silver(I)-catalyzed cascade reaction of 4-diazopyrazol-3-one with arylhydrazine hydrochlorides was also developed. The advantages of these methodologies are easy handling, mild reaction conditions, and an effective and non-toxic catalyst usage.