Hantzsch ester → HCID 86613959, compound

Participants

Reaction Steps

To 20 ml of toluene were added 1.4 g of 1-(biphenyl-4-ylmethyl)-5-(4-oxo-2-thioxothiazolidine-5-ylidenemethyl)-3,4-dihydro-1H-quinolin-2-one, 1.01 g of diethyl 1,4-dihydro-2,6-dimethyl-3,5-pyridine dicarboxylate, and 1.4 g of silica gel, followed by heating and refluxing overnight. The solvent was distilled off, and the residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=4:1→2:1). The purified product was recrystallized from toluene, giving 0.84 g (60% yield) of 1-(biphenyl-4-ylmethyl)-5-(4-oxo-2-thioxothiazolidin-5-ylmethyl)-3,4-dihydro-1H-quinolin-2-one as a white powder.

Provenance & Evidence