Dimethylamine → N'-(5-Mesityl-3,7-dimethyl-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-2-yl)-N,N-dimethylurea

Temperature

60 °C

To a solution of 2-amino-5-mesityl-3,7-dimethyl-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one (0.040 g, 0.135 mmol) in tetrahydrofuran (1 mL) were added p-nitrophenyl chloroformate (0.073 g, 0.361 mmol) and triethylamine (0.050 mL, 0.361 mmol), and the mixture was allowed to stir at 60° C. for 2 hours. A 2M solution of dimethylamine in tetrahydrofuran (0.4 mL) was added to the mixture, followed by stirring at 60° C. for 15 hours. After cooling, the reaction mixture was diluted with ice-cold water and extracted with ethyl acetate. The organic layer was washed with water and brine, dried over sodium sulfate and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with hexane/ethyl acetate (4:1-1:2). The desired fractions were concentrated in vacuo, and the residual crystals were washed with diisopropyl ether-diethyl ether to give 0.012 g (24%) of the title compound.

1. stirringby stirring at 60° C. for 15 hours
2. temperatureAfter cooling
3. additionthe reaction mixture was diluted with ice-cold water
4. extractionextracted with ethyl acetate
5. washThe organic layer was washed with water and brine
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated in vacuo
8. customThe residue was purified by silica gel column chromatography
9. washeluting with hexane/ethyl acetate (4:1-1:2)
10. concentrationThe desired fractions were concentrated in vacuo
11. washthe residual crystals were washed with diisopropyl ether-diethyl ether

ORD record

ord-ceba88ea64824390a60aa5038658f08b

Source dataset

uspto-grants-2011_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07897607B2