Propargylamine → 4-propargylamino-3-[3-[3-(2-cyanoethenyl)phenyl]-1-oxo-2-propenyl]-6-methyl-2H-pyran-2-one

Participants

Reaction Steps

To a mixture of 0.20 g of 4-methoxy-3-[3-[3-(2-cyanoethenyl)phenyl]-1-oxo-2-propenyl]-6-methyl-2H-pyran-2-one and 10 ml of benzene was added 34.3 mg of propargylamine, and the mixture was heated under refluxing for 3 hours and 45 minutes. After cooling to room temperature, precipitated crystals were filtered to obtain 68.0 mg of 4-propargylamino-3-[3-[3-(2-cyanoethenyl)phenyl]-1-oxo-2-propenyl]-6-methyl-2H-pyran-2-one [Compound No. (20b)] as a pale brown powder.

Provenance & Evidence