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0 °C

Ethyl 3-{[(2-propen-1-yloxy)carbonyl]amino}benzoate (20.0 g, 80.24 mmol) was dissolved in 1M LiHMDS in THF (260 mL) and cooled to 0° C. A solution containing 2-chloro-4-methylpyrimidine (10.32 g, 80.24 mmol) in 20 mL dry THF was added to the reaction mixture. The reaction was stirred at 0° C. for 2 h, quenched with MeOH (100 mL), dried directly onto silica, and purified via flash chromatography EtOAc/CH2Cl2 0-100% gradient run over 60 min. The desired fractions were combined and the solvent was removed to give the title compound (13.6 g, 51% yield); ES-LCMS m/z 332 (M+H).

1. additionwas added to the reaction mixture
2. customquenched with MeOH (100 mL)
3. customdried directly onto silica
4. custompurified via flash chromatography EtOAc/CH2Cl2 0-100% gradient run over 60 min
5. customthe solvent was removed