Triethylamine → HCID 10024380, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 25.4 g ethyl 7-bromo-1,4-dihydro-1-(4-fluorophenyl)-4-oxo-3-quinolinecarboxylate in 975 ml acetonitrile at 40°-50° C. was added 1.4 g cuprous iodide and 325 ml triethylamine. The air in the reaction was replaced by argon, and 1.4 g bis-triphenylphosphine palladium dichloride and 15.5 ml trimethylsilylacetylene were added. The reaction mixture was heated at reflux for one hour, then chilled to 0° C, and the product was collected to give 23.4 g ethyl 1,4-dihydro-1-(4-fluoro- phenyl)-4-oxo-7-(trimethylsilylethynyl)-3-quinolinecarboxylate. A sample of the compound was further purified by recrystallization from DMF to give a colorless solid, m.p. 247°-249° C. The corresponding carboxylic acid, obtained by hydrolysis of the ester with ethanolic hydrogen chloride, was obtained as a light-tan powder, m.p. 289° C. (decompn.).

Provenance & Evidence