反应详情

To a solution of 7-allyl-3-ethyl-1H-purine-2,6(3H,7H)-dione (7 g, 31.82 mmol) in DMF (50 mL) was added NCS (5 g, 37.45 mmol) in portions at 0° C. The resulting mixture was stirred at room temperature for 5 h under nitrogen. The reaction was partitioned between ethyl acetate and water. The organic phase was washed with brine, dried over sodium sulfate, and concentrated to give 7-allyl-8-chloro-3-ethyl-1H-purine-2,6(3H,7H)-dione (11.8 g, ˜50% pure) as light yellow oil. LCMS retention time 0.764 min; LCMS MH+ 255.

1. customThe reaction was partitioned between ethyl acetate and water
2. washThe organic phase was washed with brine
3. dry with materialdried over sodium sulfate
4. concentrationconcentrated