55908-54-8

Basic information

• Product Name: 1,2-bis(2-chlorophenyl)-1,2-dihydro-5-methyl-3H-pyrazol-3-one
• CAS NO: 55908-54-8
• Molecular Weight: 319.19
• Mol File: 55908-54-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1,2-bis(2-chlorophenyl)-1,2-dihydro-5-methyl-3H-pyrazol-3-one(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-bis(2-chlorophenyl)-1,2-dihydro-5-methyl-3H-pyrazol-3-one(55908-54-8)
• EPA Substance Registry System: 1,2-bis(2-chlorophenyl)-1,2-dihydro-5-methyl-3H-pyrazol-3-one(55908-54-8)

Safety Data

• Hazardous Substances Data: 55908-54-8(Hazardous Substances Data)

Upstream product

• 108-24-7 acetic anhydride 
• 782-74-1 1,2-bis(2-chlorophenyl)hydrazine 

Relevant articles and documents

Reaction of 1,2-Diarylhydrazines with Acetic Anhydride Catalyzed by 4-(Dimethylamino)pyridine

A new method for the synthesis of 1,2-diaryl-1,2-dihydro-5-methyl-3H-pyrazol-3-ones 3 and 4-acetyl-1,2-diaryl-1,2-dihydro-5-methyl-3-H-pyrazol-3-ones 5 is presented.The reaction of 4,4'-disubstituted 1,2-diarylhydrazines 1 with acetic anhydride in the presence of an equimolar amount of 4-(dimethylamino)pyridine leads to mixtures of the corresponding acetyl derivatives 2 and 3.Under the same conditions, 2,2'-disubstituted 1,2-diarylhydrazines yield mixtures of 3 and 5. Keywords.Catalysis by 4-(Dimethylamino)pyridine; 1,2-Diaryl-1,2-dihydro-5-methyl-3H-pyrazol-3-ones; 4-Acetyl-1,2-diaryl-1,2-dihydro-5-methyl-3H-pyrazol-3-ones.