反应详情

To a solution of 1,1-dimethylethyl (2S)-2-[(3-chloro-7-methylimidazo[1,2-a]pyrimidin-2-yl)methyl]-1-piperidinecarboxylate (D4) (0.085 g, 0.23 mmol) in DCM (2 ml), TFA (0.5 ml) was added dropwise at 0° C. and the solution was stirred for 1 h. The solvent was removed and the residue charged into a SCX column and eluted with methanol and ammonia 2 M in methanol. Collected fractions gave the title compound (0.060 g, 0.23 mmol, 97% yield) as a colorless oil. UPLC: rt=0.39, peak observed: 265 (M+1, 100%) and 267 (M+1, 33%). C13H17ClN4 requires 265. 1H NMR (400 MHz, CDCl3) δ(ppm): 8.12-8.21 (d, 1H), 6.80-6.88 (d, 1H), 3.02-3.14 (m, 2H), 2.78 2.91 (m, 2H), 2.60-2.72 (m, 4H), 1.28-1.84 (m, 6H).

1. customThe solvent was removed
2. additionthe residue charged into a SCX column
3. washeluted with methanol and ammonia 2 M in methanol