反应详情

温度

100 °C

A mixture of dimethyl 5-(dimethylamino)thiazolo[5,4-d]pyrimidin-2-ylcarbonimidodithioate (90 mg, 0.301 mmol), (S)-3-(aminomethyl)quinuclidin-3-ol dihydrochloride (83 mg, 0.361 mmol) and cesium carbonate (196 mg, 0.60 mmol) in DMF (1.0 mL) was heated to 100° C. for 1.5 hours. The reaction mixture was cooled to ambient temperature, poured into water and extracted with chloroform (4×). The combined organics were washed with brine, dried over sodium sulfate, filtered, concentrated in vacuo, and the crude residue was purified by silica gel chromatography (2-40% 9:1 methanol: ammonium hydroxide-chloroform) to afford (R)—N5,N5-dimethyl-N2-(4H-1′-azaspiro[oxazole-5,3′-bicyclo[2.2.2]octane]-2-yl)thiazolo[5,4-d]pyrimidine-2,5-diamine (81 mg, 71% yield) as a tan solid. 1H NMR (400 MHz, CDCl3) δ ppm 9.07 (br. s., 1H) 8.50 (s, 1H) 4.01 (d, J=9.54 Hz, 1H) 3.67 (d, J=9.54 Hz, 1H) 3.39 (dd, J=14.93, 1.63 Hz, 1H) 3.23 (s, 6H) 2.71-3.10 (m, 5H) 2.10-2.24 (m, 2H) 1.68-1.84 (m, 1H) 1.46-1.68 (m, 2H). MS (LC/MS) R.T.=0.87; [M+H]+=360.23.

1. temperatureThe reaction mixture was cooled to ambient temperature
2. extractionextracted with chloroform (4×)
3. washThe combined organics were washed with brine
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customthe crude residue was purified by silica gel chromatography (2-40% 9:1 methanol: ammonium hydroxide-chloroform)