反应详情

A mixture of 5-methyl-2,4(1H,3H)-pyrimidinedione (thimine, 500 mg) and K2CO3 (548 g) in dry DMF (15 mL) was stirred for 1 hour at room temperature. 1-bromo-4-chloropentane (0.548 mL) was then added and the mixture was stirred at room temperature for 4 hours. Water was then added and the resulting mixture was extracted with dichloromethane. The aqueous phase was acidified to pH 7 with aqueous 2% HCl solution and extracted with DCM. The organic phases were dried and concentrated in vacuo. The crude product was purified by a silica SPE cartridge eluting with DCM/MeOH from 98/2 to 95/5 to give the title compound (100 mg).

1. stirringthe mixture was stirred at room temperature for 4 hours
2. extractionthe resulting mixture was extracted with dichloromethane
3. extractionextracted with DCM
4. customThe organic phases were dried
5. concentrationconcentrated in vacuo
6. customThe crude product was purified by a silica SPE cartridge
7. washeluting with DCM/MeOH from 98/2 to 95/5