137368-91-3

Basic information

• Product Name: ethyl α-azido-β-<(1-phenyl)-4-pyrazolyl>acrylate
• Synonyms: ethyl α-azido-β-<(1-phenyl)-4-pyrazolyl>acrylate
• CAS NO: 137368-91-3
• Molecular Weight: 283.29
• Mol File: 137368-91-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: ethyl α-azido-β-<(1-phenyl)-4-pyrazolyl>acrylate(CAS DataBase Reference)
• NIST Chemistry Reference: ethyl α-azido-β-<(1-phenyl)-4-pyrazolyl>acrylate(137368-91-3)
• EPA Substance Registry System: ethyl α-azido-β-<(1-phenyl)-4-pyrazolyl>acrylate(137368-91-3)

Safety Data

• Hazardous Substances Data: 137368-91-3(Hazardous Substances Data)

Upstream product

• 637-81-0 ethyl-2-azidoacetate 
• 54605-72-0 1-phenyl-1H-pyrazole-4-carbaldehyde 

Downstream Products

• 137368-94-6 7-Benzhydryl-1-phenyl-1H-pyrazolo[3,4-c]pyridine-5-carboxylic acid ethyl ester 
• 137368-93-5 1-Phenyl-7-(1-phenyl-propyl)-1H-pyrazolo[3,4-c]pyridine-5-carboxylic acid ethyl ester 
• 137368-92-4 C₃₂H₂₈N₃O₂P 

Relevant articles and documents

Pyrido annelation reaction by a tandem aza Wittig/electrocyclic ring-closure strategy: Preparation of pyrazolo[4,3-c]- and pyrazolo[3,4-c]pyridine derivatives

The aza Wittig-type reaction of iminophosphorane 3, prepared from 5-formyl-1-phenylpyrazole by sequential treatment with ethyl azidoacetate and triphenylphosphine, with isocyanates, ketenes, aldehydes and carbon disulfide leads to the functionalized pyrazolo[4,3-c]pyridines 5, 7, 9 and 11 respectively. Iminophosphorane 15, prepared from 4-formyl-1-phenylpyrazole, undergoes pyrido annelation by reaction with ketenes to give the isomeric pyrazolo[3,4-c]pyridines 22 in modest yields.