تفاعل #88635

معادلة التفاعل

3-(5-(4-chlorobenzyl)-1-methyl-2,4-dioxo-1H-pyrrolo[3,2-d]pyrimidin-3(2H, 4H,5H)-yl)propyl acetate

NBS

→

3-(7-bromo-5-(4-chlorobenzyl)-1-methyl-2,4-dioxo-1H-pyrrolo[3,2-d]pyrimidin-3(2H,4H,5H)-yl)propyl acetate

المردود 66.5%

المذيبات

DCM

DCM

water

ظروف التفاعل

المعالجة

1. 1
   تجفيفThe organic layer was dried over Na2SO4
2. 2
   تركيزconcentrated to a residue which
3. 3
   أخرىwas purified by chromatography
4. 4
   غسيلeluted with PE/EA (5:1 to 1:1)

الإجراء التجريبي

To a solution of 3-(5-(4-chlorobenzyl)-1-methyl-2,4-dioxo-1H-pyrrolo[3,2-d]pyrimidin-3(2H, 4H,5H)-yl)propyl acetate (1.50 g, 3.85 mmol) in DCM (1 mL) was added NBS (0.68 g, 3.85 mmol). The reaction was stirred at RT for 1 h then diluted with DCM (10 mL) and water (5 mL). The organic layer was dried over Na2SO4 and concentrated to a residue which was purified by chromatography eluted with PE/EA (5:1 to 1:1) to give 3-(7-bromo-5-(4-chlorobenzyl)-1-methyl-2,4-dioxo-1H-pyrrolo[3,2-d]pyrimidin-3(2H,4H,5H)-yl)propyl acetate (1.2 g, 66.5% yield) as a solid. LCMS: MH+ 468 and TR=1.777 min. Used without further purification.

المصدر