Cesium carbonate → Methyl 4-(5-(3-cyanophenyl)-1,3-dimethyl-2,4-dioxo-3,4-dihydro-1H-pyrrolo[3,4-d]pyrimidin-6(2H)-yl)butanoate

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-(1,3-dimethyl-2,4-dioxo-2,3,4,6-tetrahydro-1H-pyrrolo[3,4-d]pyrimidin-5-yl)benzonitrile (step 4) (300 mg, 1.07 mmol), methyl 4-bromobutanoate (291 mg, 1.61 mmol) and cesium carbonate (697 mg, 2.14 mmol) in DMF (4 mL) was stirred at 80° C. for 2 hours. The reaction mixture was diluted with ethyl acetate (20 mL) and was washed with 1M HCl (3×10 mL). After the third wash, the mixture was concentrated in vacuo. The residue was triturated with diethyl ether and dried under vacuum at 50° C.

Provenance & Evidence