反应详情

N′-(5-{2-[1-(2-tert-butoxyethyl)piperidin-4-yl]ethoxy}-2-cyano-4-methoxyphenyl)-N,N-dimethylimidoformamide (654 mg, 1.5 mmol) in acetic acid (1.35 ml) was heated with (3-amino-1H-pyrazol-5-yl)acetic acid (214 mg, 1.52 mmol) at reflux for 45 minutes. Acetic acid was evaporated and the residue taken up in a mixture of dichloromethane:methanol. Excess diisopropylethylamine was added, and the solvent evaporated in vacuo. Dichloromethane was added to the solid, which was filtered and dried to yield {3-[(7-{2-[1-(2-tert-butoxyethyl)piperidin-4-yl]ethoxy}-6-methoxyquinazolin-4-yl)amino]-1H-pyrazol-5-yl}acetic acid as a white powder (530 mg, 66% yield):

1. temperatureat reflux for 45 minutes
2. customAcetic acid was evaporated
3. additionthe residue taken up in a mixture of dichloromethane
4. additionExcess diisopropylethylamine was added
5. customthe solvent evaporated in vacuo
6. additionDichloromethane was added to the solid, which
7. filtrationwas filtered
8. customdried