2,4-Diamino-6-ethoxypyrimidine → 8-(6-Acetyl-2-amino-4-ethoxy-7-methyl-5,8-dihydropyrido[2,3-d]pyrimidin-5-yl)-2-methyl-4H-chromen-4-one

Participants

Reaction Steps

270 mg (1 mmol) of 3-[(2-methyl-4-oxo-4H-chromen-8-yl)methylene]pentane-2,4-dione and 170 mg (1.1 mmol) of 6-ethoxypyrimidine-2,4-diamine are dissolved in 5 ml of isopropanol and heated under reflux under argon for 2 days. The mixture is then concentrated and the residue is purified by preparative HPLC. 230 mg (56% of theory) of the title compound are obtained as a yellow solid.

Provenance & Evidence