157465-71-9

Basic information

• Product Name: 1(6H)-Pyridazinecarboxylic acid, 6-ethynyl-, ethyl ester
• Synonyms: 1(6H)-Pyridazinecarboxylic acid, 6-ethynyl-, ethyl ester
• CAS NO: 157465-71-9
• Molecular Formula: C9H10N2O2
• Molecular Weight: 178.19
• Mol File: 157465-71-9.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 1(6H)-Pyridazinecarboxylic acid, 6-ethynyl-, ethyl ester(CAS DataBase Reference)
• NIST Chemistry Reference: 1(6H)-Pyridazinecarboxylic acid, 6-ethynyl-, ethyl ester(157465-71-9)
• EPA Substance Registry System: 1(6H)-Pyridazinecarboxylic acid, 6-ethynyl-, ethyl ester(157465-71-9)

Safety Data

• Hazardous Substances Data: 157465-71-9(Hazardous Substances Data)

Upstream product

• 289-80-5 1,2-diazine 
• 994-89-8 tributylethynyltin 
• 541-41-3 chloroformic acid ethyl ester 
• 994-71-8 bis(tributylstannyl)acetylene 

Relevant articles and documents

A New Entry to the Ethynylation of Azaaromatics Using Bis(tributylstannyl)acetylene in the Presence of Alkyl chloroformate

Unstable N-alkoxycarbonyl quaternary salts of azaaromatics were trapped in situ by bis(tributylstannyl)acetylene followed by the treatment with trifluoroacetic acid to give 2-ethynyl adducts in good yields.The same compounds were obtained only in low yields when ethynyltributyltin was used as a nucleophile.The reaction was revealed to be available for various aromatics including pyridine, pyrazine, imidazole, thiazole, oxazole, and benzodiazines.