反应详情

A mixture of (S)-2-amino-4-(1-(5-chloro-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile 59 (50 mg, 0.12 mmol), 4-(tributylstannyl)pyridazine (89 mg, 0.24 mmol) and PdCl2(dppf) (9.7 mg, 0.012 mmol) in 1,4-dioxane (5 mL) was stirred at reflux under argon for 16 h. The mixture was allowed to cool to RT, poured into water (20 mL) and extracted with ethyl acetate (2×15 mL). The combined organic layers were washed with brine, dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo and the residue was purified by flash column chromatography on silica gel eluting with 3% MeOH-DCM to afford the product, (S)-2-amino-4-((1-(4-oxo-3-phenyl-5-(pyridazin-4-yl)-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile 66. ESI-MS m/z: 462.2 [M+H]+.

1. temperatureat reflux under argon for 16 h
2. extractionextracted with ethyl acetate (2×15 mL)
3. washThe combined organic layers were washed with brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationThe filtrate was concentrated in vacuo
7. customthe residue was purified by flash column chromatography on silica gel eluting with 3% MeOH-DCM