Water → tert-Butyl {(3R)-1-[5-(2-chlorobenzyl)-7-formyl-1,3-dimethyl-2,4-dioxo-2,3,4,5-tetrahydro-1H-pyrrolo[3,2-d]pyrimidin-6-yl]piperidin-3-yl}carbamate

Participants

Reaction Steps

Phosphorus oxychloride (551 μl) was added to dimethylformamide (10 ml) at room temperature and stirred for 5 minutes. 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 (502 mg) in N,N-dimethylformamide (1 ml) was added to the reaction solution, and the resulting mixture was stirred at room temperature for 3 hours. Water was added to the reaction solution, followed by extraction with ethyl acetate (100 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=1/1) to obtain the title compound (290 mg).

Provenance & Evidence