Acetic Acid → Cyclobutyl 5-cyano-2,6-dimethyl-4-(2-methyl-4-oxo-4H-chromen-8-yl)-1,4-dihydropyridine-3-carboxylate

Participants

Reaction Steps

60 mg (0.32 mmol) of 2-methyl-4-oxo-4H-chromene-8-carbaldehyde are dissolved with 49.7 mg (0.32 mmol) of cyclobutyl 3-oxobutanoate, 26.2 mg (0.32 mmol) of 3-aminocrotononitrile and 19.1 mg (0.32 mmol) of acetic acid in 5 ml of 2-propanol and heated under reflux under argon for 4 h. The solvent is removed in vacuo, and the residue is purified by preparative HPLC. 64 mg (51% of theory) of the title compound are obtained as a yellow solid.

Provenance & Evidence