Triethylamine → 1,3-dimethyl-5-phenyl-1H-pyrrolo[3,4-d]pyrimidine-2,4(3H,6H)-dione

Participants

Reaction Steps

5-Benzoyl-6-(bromomethyl)-1,3-dimethylpyrimidine-2,4(1H,3H)-dione 13.4a (Intermediate C) (2.33 g, 6.91 mmol), hexamethyldisilazane (2.90 mL, 13.82 mmol) and triethylamine (2.89 mL, 20.73 mmol) were combined in dioxane (20 mL) and the mixture heated at reflux for 22 hours. Further portions of hexamethyldisilazane (2.90 mL, 13.82 mmol) and triethylamine (2.89 mL, 20.73 mmol) were added to allow the reaction to run to completion. The reaction mixture was cooled to room temperature, diluted with EtOAc (150 mL) and washed with 1M HCl (aq) and brine. The organic phases was dried over sodium sulphate and evaporated under vacuum. The residue was triturated with DCM/diethyl ether/hexane to afford the title compound.

Provenance & Evidence