反应详情

100 mg (0.53 mmol) of 2-methyl-4-oxo-4H-chromene-8-carbaldehyde are dissolved with 93.1 mg (0.93 mmol) of 2,4-pentanedione, 89.9 mg (0.53 mmol) of cyclopentyl 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 preparative HPLC. 84 mg (37.5% of theory) of the title compound are obtained as a yellow solid.

1. temperatureheated
2. temperatureto reflux under argon for 10 h
3. customThe solvent is removed in vacuo
4. customthe residue is purified by preparative HPLC