反应详情

A solution of methyl 3-{[5-(methoxymethoxy)-1-(methoxymethyl)-6-oxo-1,6-dihydropyridin-3-yl]sulfanyl}propanoate (Intermediate 16; 300 mg, 0.95 mmol) in THF (5 ml) was cooled to −45° C. and potassium tert-butoxide (117 mg, 0.10 mmol) was added. After stirring at this temperature for 1 hour 1-(chloromethyl)-4-methoxybenzene (154 ml, 1134 mmol) was added and the reaction stirred for 16 hours. The reaction mixture was partitioned between dichloromethane and water. The aqueous layer was re-extracted and the combined organics dried and concentrated under reduced pressure. The resultant residue was purified by column chromatography (SiO2: 80-100% ethyl acetate/petrol) to yield 5-(benzylsulfanyl)-3-(methoxymethoxy)-1-(methoxymethyl)pyridin-2(1H)-one (251 mg, 83%).

1. additionwas added
2. customThe reaction mixture was partitioned between dichloromethane and water
3. extractionThe aqueous layer was re-extracted
4. customthe combined organics dried
5. concentrationconcentrated under reduced pressure
6. customThe resultant residue was purified by column chromatography (SiO2: 80-100% ethyl acetate/petrol)