反应详情

A solution of 7-fluoro-1-(2-propen-1-yl)pyrido[2,3-b]pyrazin-2(1H)-one (196 mg, 0.956 mmol) in MeOH (5 ml) was treated with sodium methoxide (25% w/v in MeOH, 1.03 ml. 4.780 mmol) and stirred at rt for 1 h. The reaction was repeated with more 7-fluoro-1-(2-propen-1-yl)pyrido[2,3-b]pyrazin-2(1H)-one (657 mg, 3.204 mmol) in MeOH (15 ml) and sodium methoxide (25% w/v in MeOH, 3.45 ml. 16.02 mmol). This reaction was also stirred for 1 h after which time both reaction mixtures were combined and treated with water (100 ml). The mixture was then extracted with DCM (3×100 ml). The combined organic extracts were dried over anhydrous magnesium sulphate, filtered and evaporated under reduced pressure to give a yellow solid which was purified by column chromatography on silica with ethyl acetate to give the desired product as a brown solid (846 mg, 94%).

1. stirringThis reaction was also stirred for 1 h after which time
2. customboth reaction mixtures
3. extractionThe mixture was then extracted with DCM (3×100 ml)
4. dry with materialThe combined organic extracts were dried over anhydrous magnesium sulphate
5. filtrationfiltered
6. customevaporated under reduced pressure
7. customto give a yellow solid which
8. customwas purified by column chromatography on silica with ethyl acetate