反应详情

To a solution of methyl 3-{[5-(methoxymethoxy)-1-(methoxymethyl)-6-oxo-1,6-dihydropyridin-3-yl]sulfanyl}propanoate (Intermediate 16) (290 mg, 0.91 mmol) in THF (5 ml) at −45° C. was added potassium tert-butoxide (113 mg, 1.01 mmol) and the resulting mixture allowed to stir for 20 minutes. 1-(Chloromethyl)-4-ethylbenzene (170 mg, 1.10 mmol) was then added and the reaction mixture allowed to warm to room temperature and stirred for 4 hours before being quenched with water and extracted into dichlormethane. The combined organics were concentrated and subjected to column chromatography (SiO2; 0-10% methanol in dichloromethane) to yield 5-[(4-ethylbenzyl)sulfanyl]-3-(methoxymethoxy)-1-(methoxymethyl)pyridin-2(1H)-one (253 mg, 79%).

1. stirringstirred for 4 hours
2. custombefore being quenched with water
3. extractionextracted into dichlormethane
4. concentrationThe combined organics were concentrated