反应详情

温度

50 °C

To a mixture of methyl 2,6-dichloropyrimidine-4-carboxylate (5.175 g, 25.00 mmol) in acetonitrile (100 mL) was added (S)-methyl 2-aminopropanoate hydrochloride (3.497 g, 25.05 mmol) and iPr2NEt (9.6 mL, 55.1 mmol). The mixture was heated at 50° C. overnight then concentrated in vacuo. The residue was chromatographed over silica gel with 30-70% EtOAc in hexanes. The product fractions were evaporated in vacuo to yield (S)-methyl 2-chloro-6-((1-methoxy-1-oxopropan-2-yl)amino)pyrimidine-4-carboxylate as a thick yellow-orange oil (4.194 g, 15.33 mmol, 61% yield). LC/MS: m/z=274.2 [M+H]+.

1. concentrationthen concentrated in vacuo
2. customThe residue was chromatographed over silica gel with 30-70% EtOAc in hexanes
3. customThe product fractions were evaporated in vacuo