79605-82-6

Basic information

• Product Name: 3H-Pyrazol-3-one, 2,4-dihydro-4-(4-methoxybenzoyl)-5-methyl-2-phenyl-
• CAS NO: 79605-82-6
• Molecular Formula: C18H16N2O3
• Molecular Weight: 308.337
• Mol File: 79605-82-6.mol

Chemical Properties

• CAS DataBase Reference: 3H-Pyrazol-3-one, 2,4-dihydro-4-(4-methoxybenzoyl)-5-methyl-2-phenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 3H-Pyrazol-3-one, 2,4-dihydro-4-(4-methoxybenzoyl)-5-methyl-2-phenyl-(79605-82-6)
• EPA Substance Registry System: 3H-Pyrazol-3-one, 2,4-dihydro-4-(4-methoxybenzoyl)-5-methyl-2-phenyl-(79605-82-6)

Safety Data

• Hazardous Substances Data: 79605-82-6(Hazardous Substances Data)

Upstream product

• 100-63-0 phenylhydrazine 

Downstream Products

• 314275-15-5 4-(p-methoxybenzoyl)-5-chloro-3-methyl-1-phenylpyrazole 

Relevant articles and documents

Ring-opening polymerization of lactides catalyzed by magnesium complexes coordinated with NNO-tridentate pyrazolonate ligands

A series of magnesium benzylalkoxide complexes, [LnMg(μ-OBn)] 2 (1-14) supported by NNO-tridentate pyrazolonate ligands with various electron withdrawing-donating subsituents have been synthesized and characterized. X-ray crystal structural studies revealed that Complexes 1-3, 5, 7, 9, and 10 are dinuclear bridging through benzylalkoxy oxygen atoms with penta-coordinated metal centers. All of these complexes acted as efficient initiators for the ring-opening polymerization of L-lactide and rac-lactide. Based on kinetic studies, the activity of these metal complexes is significantly influenced by the electronic effect of the ancillary ligands with the electron-donating substituents at the phenyl rings enhancing the polymerization rate. In addition, the "living" and "immortal" character of 6 has paved a way to synthesize as much as 40-fold polymer chains of polylactides with a very narrow polydispersity index in the presence of a small amount of initiator. Among all of magnesium complexes, Complex 6 exhibits the highest stereoselectivity toward ring-opening polymerization of rac-lactide with Pr up to 88% in THF at 0 °C.