N-bromobutanimide → HCID 86617440, compound

Participants

Reaction Steps

Diethyl 3-((6-amino-2-(2-methoxyethoxy)-9H-purin-9-yl)methyl)phenylphosphonate (30) (400 mg, 0.92 mmol) was dissolved in acetonitrile and N-bromosuccinimide (500 mg, 2.8 mmol) was added in one portion. After stirring at room temperature for 2 h, the reaction mixture was diluted with ethyl acetate (150 mL) and washed with water, 0.2 M sodium thiosulfate solution and brine. The organic phase was dried with sodium sulfate and the solvent was removed under vacuum. The crude diethyl 3-((6-amino-8-bromo-2-(2-methoxyethoxy)-9H-purin-9-yl)methyl)phenylphosphonate (450 mg, 95%) was used in the next step without further purification.

Provenance & Evidence