反应详情

A solution of (2R,3R)-2-amino-3-(tert-butoxy)butan-1-ol (267 mg, 1.35 mmol, 1.1 equiv), 2,4-dichloro-6-methylpyrimidine (200 mg, 1.23 mmol, 1.0 equiv), and N-ethyl-N-isopropylpropan-2-amine (0.54 mL, 3.1 mmol, 2.5 equiv) in 1,4-dioxane (6 mL) was heated at 75° C. for 4 h. The reaction was cooled to room temperature and concentrated in vacuo. Silica gel column chromatography (EtOAc/Heptane) provided (2R,3R)-3-(tert-butoxy)-2-((2-chloro-6-methylpyrimidin-4-yl)amino)butan-1-ol (86 mg, white solid) in 24% yield. 1H NMR (400 MHz, CDCl3) δ 6.17 (s, 1H), 4.02 (m, 2H), 3.79-3.64 (m, 2H), 2.30 (s, 3H), 1.22 (s, 9H), 1.18 (d, J=6.2 Hz, 3H); MS m/z 288.1 (M+H)+; Rt-0.59 min.

1. concentrationconcentrated in vacuo