Acetic Acid → Cyclobutyl 2,6-dimethyl-4-(2-methyl-4-oxo-4h-chromen-8-yl)-5-(trifluoroacetyl)-1,4-dihydro-pyridine-3-carboxylate

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Reaction Steps

100 mg (0.53 mmol) of 2-methyl-4-oxo-4H-chromene-8-carbaldehyde are dissolved with 143.3 mg (0.93 mmol) of 1,1,1-trifluoroacetylacetone, 82.4 mg (0.53 mmol) of cyclobutyl 3-aminocrotonate and 31.9 mg (0.53 mmol) of acetic acid in 5 ml of 2-propanol and heated to reflux under argon for 10 h. The solvent is removed in vacuo, and the residue is purified by column chromatography (mobile phase: dichloromethane/methanol 95:5). 8 mg (3.2% of theory) of the title compound are obtained as a yellow solid.

Provenance & Evidence