Isopropanol → HCID 14770070, compound

Participants

Reaction Steps

7.1 ml of tri-n-butylamine and 6.1 ml of isopropanol were added to a suspension of 2.0 g of 4,5-dihydro-7-oxo-8-phenyl-7H-thieno[2.3-a]quinolizine-10-carboxylic acid and 3.8 g of N-methyl-2-chloropyridinium iodide in 12.5 ml of methylene chloride, the reaction mixture was stirred under reflux for 24 hours, evaporated in vacuo and the residue was chromatographed on silica gel with toluene/ethyl acetate (9:1). After crystallization from methanol, there was obtained pure isopropyl 4,5-dihydro-7-oxo-8-phenyl-7H-thieno[2,3-a]quinolizine-10-carboxylate of m.p. 165.5°-166°.

Provenance & Evidence