Triphenylphosphine → 6-[2-(4-acetylpiperazin-1-yl)ethoxy]-4-[(4-fluoro-1H-indol-5-yl)oxy]-7-methoxyquinazoline

Participants

Reaction Steps

A mixture of 4-[(4-fluoro-1H-indol-5-yl)oxy]-6-hydroxy-7-methoxyquinazoline (260 mg, 0.80 mmol), (prepared as described for the starting material in Example 10), 2-(4-acetylpiperazin-1-yl)ethanol (165 mg, 0.96 mmol), (prepared as described for the starting material in Example 28), and triphenylphosphine (252 mg, 0.96 mmol) in dichloromethane (15 ml) was stirred and cooled in an ice/water bath. Diisopropyl azodicarboxylate (189 μl, 0.96 mmol) was added. The mixture was stirred for 3 hours and then a further 0.5 mole equivalent of 2-(4-acetylpiperazin-1-yl)ethanol, triphenylphosphine and diisopropyl azodicarboxylate were added. The mixture was stirred for a further 1 hour and then concentrated under reduced pressure. The residue was purified by column chromatography eluting with methylene chloride/methanol (95/5) to give 6-[2(4-acetylpiperazin-1-yl)ethoxy]-4-[(4-fluoro-1H-indol-5-yl)oxy]-7-methoxyquinazoline (260 mg, 68%) as a white solid.

Provenance & Evidence