50656-03-6

Upstream product

• 3597-91-9 biphenyl-4-yl methanol 
• 7253-66-9 (E)-1-([1,1′-biphenyl]-4-ylmethylene)-2-phenylhydrazine 
• 3218-36-8 4-Phenylbenzaldehyde 
• 1448231-27-3 N'-phenyl-1,1-biphenyl-4-carbohydrazide 
• 100-63-0 phenylhydrazine 
• 14002-51-8 4-biphenyl-carboxylic acid chloride 

Downstream Products

• 1448231-34-2 3-(1,1-biphenyl-4-yl)-4-[2-(3,4-dimethoxybenzylidene)hydrazinyl]-1-phenyl-1H-pyrazolo[3,4-d]pyrimidine 
• 1448231-35-3 C₃₁H₂₂N₆O₂ 
• 1448231-36-4 C₂₈H₂₀N₆O 
• 1448231-37-5 C₂₈H₂₀N₆S 
• 1448231-38-6 9-(1,1-biphenyl-4-yl)-3,7-diphenyl-7H-pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidine 
• 1448231-39-7 9-(1,1-biphenyl-4-yl)-3-(4-chlorophenyl)-7-phenyl-7H-pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidine 
• 1448231-41-1 3-(1,3-benzodioxol-5-yl)-9-(1,1'-biphenyl-4-yl)-7-phenyl-7H-pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidine 
• 1448231-42-2 9-(1,1'-biphenyl-4-yl)-3-(2-furyl)-7-phenyl-7H-pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidine 
• 1448231-43-3 9-(1,1'-biphenyl-4-yl)-7-phenyl-3-(2-thienyl)-7H-pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidine 
• 1448231-44-4 9-(1,1′-biphenyl-4-yl)-2,7-diphenyl-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine 
• 1448231-45-5 9-(1,1′-biphenyl-4-yl)-2-(4-chlorophenyl)-7-phenyl-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine 
• 1448231-47-7 2-(1,3-benzodioxol-5-yl)-9-(1,1'-biphenyl-4-yl)-7-phenyl-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine 
• 1448231-48-8 9-(1,1'-biphenyl-4-yl)-2-(2-furyl)-7-phenyl-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine 
• 1448231-49-9 9-(1,1'-biphenyl-4-yl)-7-phenyl-2-(2-thienyl)-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine 

Relevant academic research and scientific papers

Facile One-Pot Transformation of Primary Alcohols into 3-Aryl- and 3-Alkyl-isoxazoles and -pyrazoles

Various primary alcohols were smoothly transformed into 3-aryl- and 3-alkylisoxazoles in good yields in one pot by successive treatment with PhI(OAc) 2 in the presence of TEMPO, NH 2 OH, and then NCS, followed by reaction with alkynes in the presence of Et 3 N. Similarly, various primary alcohols were smoothly transformed into 3-aryl- and 3-alkylpyrazoles in good yields in one pot by successive treatment with PhI(OAc) 2 in the presence of TEMPO, PhNHNH 2, and then NCS and decyl methyl sulfide, followed by reaction with alkynes in the presence of Et 3 N. Thus, both 3-aryl- and 3-alkylisoxazoles, and 3-aryl- and 3-alkylpyrazoles could be prepared from readily available primary alcohols in one pot under transition-metal-free conditions.

Synthesis of a new series of biphenyl-substituted, fused 1,2,4-triazoles by oxidative cyclisation and Dimroth rearrangement

A new series of 3-substituted-9-(1,1′-biphenyl-4-yl)-7-phenyl-7H- pyrazolo[4,3-e][1,2,4]triazolo [4,3-c]pyrimidines and 2-substituted-9-(1, 1′-biphenyl-4-yl)-7-phenyl-7H-pyrazolo[4,3-e][1,2,4] triazolo[1,5-c] pyrimidines were synthesised, as a new class of potent xanthine oxidase inhibitors, by oxidative cyclisation of 4-[2-(arylidene)hydrazinyl]-3-(1,1- biphenyl-4-yl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidines with FeCl3 in ethanol and Dimroth rearrangement. Keywords: hydrazones, nitrilimines, 1,5- electrocyclisation, heterocycles, Dimroth rearrangement.