Dimethylformamide → 3-Isopropyl-5-mesityl-7-methyl-2-(propylamino)-3,7-dihydro-4h-pyrrolo[2,3-d]pyrimidin-4-one

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Reaction Steps

To a solution of 2-amino-3-isopropyl-5-mesityl-7-methyl-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one (100 mg, 0.31 mmol) and N,N-dimethylformamide (3 ml) was added sodium hydride (60% in oil, 40 mg, 1.0 mmol) at 0° C. and stirred for 0.5 hour. After stirring at room temperature for 0.5 hour, to the mixture was added a solution of n-PrI (170 mg, 1.0 mmol) and N,N-dimethylformamide (2 ml) at 0° C. and stirred for 0.5 hour. After stirring at 50° C. for 3 hours, the mixture was cooled and diluted with water (20 ml) and extracted with ethyl acetate (50 ml×2). The extracts were combined, washed with brine, dried over sodium sulfate and concentrated in vacuo. The residue was purified by silica gel chromatography eluting with hexane/ethyl acetate (20:1) to give 68 mg (60%) of the title compound.

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