反应详情

A solution of 2-chloro-6-methylpyrimidine-4-carboxylic acid (265 mg, 1.54 mmol) and Hünig's base (0.8 mL) in ethanol (1.79 mL) is stirred at 70° C. for 24 h. Ethanol is evaporated and the aq. phase is acidified with 25% aq. HCl at 0° C., concentrated and purified by prep. HPLC (X-Bridge) to give 2-ethoxy-6-methyl-pyrimidine-4-carboxylic acid (201 mg) as a yellow solid; LC-MS: tR=0.63 min, [M+H]+=183.04.

1. customEthanol is evaporated
2. customis acidified with 25% aq. HCl at 0° C.
3. concentrationconcentrated
4. custompurified by prep