反应详情

温度

60 °C

N-(2-Amino-2-methyl-propyl)-methanesulfonamide (1.15 g, 6.90 mmol, 1.2 eq.) in THF (20 mL) was cooled to 0° C. and 2,4,5-trichloropyrimidine (1.05 g, 5.75 mmol, 656 μL, 1.0 eq.) was added. The reaction was stirred for 5 minutes and then NEt3 (2.07 mL) was added. After 5 minutes, external cooling was removed and the reaction was heated at 60° C. overnight under a nitrogen atmosphere. The reaction was then partitioned between CH2Cl2 (150 mL) and sat. NaHCO3 (150 mL). The layers were separated and the aqueous layer was extracted with CH2Cl2 (75 mL). The combined organic layers were dried (sodium sulfate), filtered, and concentrated under reduced pressure onto basic alumina. Purification by basic alumina chromatography (dry loaded) using a gradient of 0-60% EtOAc/hex as the eluting solvent to obtain N-[2-(2,5-dichloro-pyrimidin-4-ylamino)-2-methyl-propyl]-methanesulfonamide as a white solid (868 mg, 48%). m.p.=156-158° C.; LCMS (m/e) 313 (M+1); 1H-NMR (CDCl3, 400 MHz) δ 8.04 (s, 1H), 5.57 (bs, 1H), 5.25-5.16 (m, 1H), 3.54 (d, 2H, J=6.8 Hz), 3.00 (s, 3H), 1.53 (s, 6H).

1. waitAfter 5 minutes
2. temperatureexternal cooling
3. customwas removed
4. customThe reaction was then partitioned between CH2Cl2 (150 mL) and sat. NaHCO3 (150 mL)
5. customThe layers were separated
6. extractionthe aqueous layer was extracted with CH2Cl2 (75 mL)
7. dry with materialThe combined organic layers were dried (sodium sulfate)
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure onto basic alumina
10. customPurification
11. customby basic alumina chromatography (dry loaded)