521944-82-1

Basic information

• Product Name: 4-(4-methoxy-phenylethynyl)-1-methyl-1H-pyrazole-3-carboxylic acid hydrazide
• Synonyms: 4-(4-methoxy-phenylethynyl)-1-methyl-1H-pyrazole-3-carboxylic acid hydrazide
• CAS NO: 521944-82-1
• Molecular Weight: 270.291
• Mol File: 521944-82-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 4-(4-methoxy-phenylethynyl)-1-methyl-1H-pyrazole-3-carboxylic acid hydrazide(CAS DataBase Reference)
• NIST Chemistry Reference: 4-(4-methoxy-phenylethynyl)-1-methyl-1H-pyrazole-3-carboxylic acid hydrazide(521944-82-1)
• EPA Substance Registry System: 4-(4-methoxy-phenylethynyl)-1-methyl-1H-pyrazole-3-carboxylic acid hydrazide(521944-82-1)

Safety Data

• Hazardous Substances Data: 521944-82-1(Hazardous Substances Data)

Upstream product

• 48121-13-7 copper(I) 4-methoxyphenylacetylenide 
• 75092-25-0 methyl 4-iodo-1-methyl-1H-pyrazole-3-carboxylate 
• 521944-76-3 4-(4-methoxy-phenylethynyl)-1-methyl-1H-pyrazole-3-carboxylic acid methyl ester 

Relevant articles and documents

Study of the heterocyclization of vic-substituted hydrazides of acetylenylpyrazolecarboxylic acids into N-amino pyrazolopyridinones

We report a new and efficient methodology to prepare N-amino pyrazolo[4,3-c]pyridin-4-ones 4 and N-amino pyrazolo[3,4-c]pyridin-4-ones 8 from vic-acetylenyl/hydrazido pyrazoles. The procedure involves the intermediate synthesis of methyl esters of acetylenyl-pyrazole carboxylic acids and the subsequent cyclization under a variety of conditions.