反应详情

Ethyl potassium malonate (57 mg) was suspended in dry tetrahydrofuran (1 ml) and 2M isopropyl magnesium chloride in THF (170 μl) added. The suspension was sonicated for 1/2 hour giving a homogenous solution. This was added with stirring to the suspension of 6-(2-methylimidazo[4,5-c]pyrid-1-yl)pyrid-3-oyl chloride in dichloromethane. The mixture was stirred at room temperature for 1/2 hour. It was then poured into 1N hydrochloric acid, stirred for 15 minutes and adjusted to pH 8 with saturated sodium bicarbonate. The aqueous phase was extracted with dichloromethane (2×10 ml), the extracts combined, dried over magnesium sulphate and the solvent removed under reduced pressure yielding the title compound as a pale red oil (40 mg, 63%) [as a 1:1 mixture of enol and keto tautomers].

1. customThe suspension was sonicated for 1/2 hour
2. customgiving a homogenous solution
3. additionThis was added
4. stirringstirred for 15 minutes
5. extractionThe aqueous phase was extracted with dichloromethane (2×10 ml)
6. dry with materialdried over magnesium sulphate
7. customthe solvent removed under reduced pressure