Ethyl Bromide → 6-Bromo-8-ethyl-2-methylsulfanylpyrido[2,3-d]pyrimidin-7-one

Participants

Reaction Conditions

Reaction Steps

To a suspension of NaH (60%, 0.15 g, 3.75 mmol) in anhydrous dimethylformamide (10 mL) was added 6-bromo-2-(methylthio)pyrido[2,3-d]pyrimidin-7(8H)-one (2, 0.68 g, 2.50 mmol) at room temperature and the reaction was stirred at 50° C. for 0.5 h. The reaction mixture was cooled to room temperature, ethyl bromide (0.22 mL, 0.32 g, 2.93 mmol) was added, and the reaction was stirred at 50° C. for 1.5 h. The mixture was poured into ice water (10 g), and the white precipitate was collected to give 6-bromo-8-ethyl-2-(methylthio)pyrido[2,3-d]pyrimidin-7(8H)-one (3, 0.57 g, 1.90 mmol, 76%). ESMS m/z 300 (M+H)+. The material was used without any further purification.

Provenance & Evidence