反应详情

温度

75 °C

Ethyl 5-chlorothiazolo[5,4-d]pyrimidin-2-ylcarbamate (300 mg, 1.16 mmol) was suspended in a 2.0 M solution of dimethylamine in methanol (5.0 mL, 10.00 mmol) in a pressure vessel, which was sealed and heated overnight on a 75° C. oil bath. The mixture was cooled to ambient temperature, the solvent was evaporated and the residue was partitioned between aqueous bicarbonate and chloroform and extracted 3 times. The combined organics were washed with brine, dried over sodium sulfate, filtered and concentrated in vacuo to afford ethyl 5-(dimethylamino)thiazolo[5,4-d]pyrimidin-2-ylcarbamate (236 mg, 99% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 11.97 (s, 1H) 8.67 (s, 1H) 4.26 (q, J=7.03 Hz, 2H) 3.17 (s, 6H) 1.16-1.40 (m, 3H). MS (LC/MS) R.T.=1.88; [M+H]+=268.09.

1. customwhich was sealed
2. temperatureThe mixture was cooled to ambient temperature
3. customthe solvent was evaporated
4. customthe residue was partitioned between aqueous bicarbonate and chloroform
5. extractionextracted 3 times
6. washThe combined organics were washed with brine
7. dry with materialdried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated in vacuo