129485-51-4

Basic information

• Product Name: 2,2'-(1-phenyl-1H-pyrazole-3,5-diyl)dipyridine
• Synonyms: 2,2'-(1-phenyl-1H-pyrazole-3,5-diyl)dipyridine
• CAS NO: 129485-51-4
• Molecular Weight: 298.347
• Mol File: 129485-51-4.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 2,2'-(1-phenyl-1H-pyrazole-3,5-diyl)dipyridine(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2'-(1-phenyl-1H-pyrazole-3,5-diyl)dipyridine(129485-51-4)
• EPA Substance Registry System: 2,2'-(1-phenyl-1H-pyrazole-3,5-diyl)dipyridine(129485-51-4)

Safety Data

• Hazardous Substances Data: 129485-51-4(Hazardous Substances Data)

Upstream product

• 2524-52-9 ethyl-2-picolinate 
• 1122-62-9 2-acetylpyridine 
• 100-63-0 phenylhydrazine 
• 10198-89-7 1-(2-pyridyl)-3-(2-pyridyl)-1,3-propanedione 
• 129485-44-5 (2Z)-3-hydroxy-1,3-di(2-pyridinyl)-2-propen-1-one 

Relevant articles and documents

Synthesis of tetrasubstituted pyrazoles containing pyridinyl substituents

A synthesis of tetrasubstituted pyrazoles containing two, three or four pyridinyl substituents is described. Hence, the reaction of 1,3-dipyridinyl-1,3-propanediones with 2-hydrazinopyridine or phenylhydrazine, respectively, affords the corresponding 1,3,5-trisubstituted pyrazoles. Iodination at the 4-position of the pyrazole nucleus by treatment with I2/HIO3 gives the appropriate 4-iodopyrazoles which served as starting materials for different cross-coupling reactions. Finally, Negishi cross-coupling employing organozinc halides and Pd catalysts turned out to be the method of choice to obtain the desired tetrasubstituted pyrazoles. The formation of different unexpected reaction products is described. Detailed NMR spectroscopic investigations (1H, 13C, 15N) were undertaken with all products prepared. Moreover, the structure of a condensation product was confirmed by crystal structure analysis.