反应详情

To a solution of tert-butyl {(3R)-1-[5-(2-chlorobenzyl)-1,3-dimethyl-2,4-dioxo-2,3,4,5-tetrahydro-1H-pyrrolo[3,2-d]pyrimidin-6-yl]piperidin-3-yl}carbamate (1.00 g) in N,N-dimethylformamide (20 ml) was added N-bromosuccinimide (392 mg), and the resulting mixture was stirred overnight at room temperature. The reaction solution was adjusted to pH 2 with a 10% aqueous potassium hydrogensulfate solution and extracted with ethyl acetate (200 ml). The organic layer was washed with a 10% aqueous potassium hydrogensulfate solution and a saturated aqueous sodium chloride solution, dried over sodium sulfate and then filtered and the filtrate was concentrated under reduced pressure. The resulting residue was purified by a silica gel column chromatography (hexane/ethyl acetate=2/1) to obtain the title compound (1.143 g).

1. extractionextracted with ethyl acetate (200 ml)
2. washThe organic layer was washed with a 10% aqueous potassium hydrogensulfate solution
3. dry with materiala saturated aqueous sodium chloride solution, dried over sodium sulfate
4. filtrationfiltered
5. concentrationthe filtrate was concentrated under reduced pressure
6. customThe resulting residue was purified by a silica gel column chromatography (hexane/ethyl acetate=2/1)