Sodium hydride → Methyl 5-methyl-4-oxo-3-(2-(2-oxopyrrolidin-1-yl)ethyl)-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylate

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Reaction Steps

To a solution of methyl 5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylate (0.8 g, 3.5 mmol) in DMF (10 ml) was added NaH (0.28 g, 7 mmol) followed by the addition of 2-(2-oxopyrrolidin-1-yl)ethyl methanesulfonate (0.7 g, 3.5 mmol). The mixture was then stirred overnight at RT. Reaction was quenched with water (10 ml) and mixture extracted with ethyl acetate. Ethyl acetate layer was separated, dried over anhydrous sodium sulfate and evaporated to yield 0.5 g of methyl 5-methyl-4-oxo-3-(2-(2-oxopyrrolidin-1-yl)ethyl)-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylate, as an oil (yield: 42.8%).

Provenance & Evidence