反应详情

温度

-78 °C

LDA (19 mg, 89 μL of 2 M solution in THF, 0.18 mmol) at −78° C. is added to a solution of 6-(2,6-diethyl-phenyl)-4-methoxy-2-methyl-nicotinic acid methyl ester (27 mg, 0.086 mmol). The mixture is stirred for 30 minutes at −78° C. Methyl iodide (15 μL, 0.24 mmol) is added and the resulting yellow mixture is stirred for 10 minutes at −78° C. After quenching with saturated NH4Cl the mixture is extracted with EtOAc. The combined extracts are dried, concentrated, and purified by flash-chromatography to give 6-(2,6-diethyl-phenyl)-2-ethyl-4-methoxy-nicotinic acid methyl ester.

1. stirringthe resulting yellow mixture is stirred for 10 minutes at −78° C
2. customAfter quenching with saturated NH4Cl the mixture
3. extractionis extracted with EtOAc
4. customThe combined extracts are dried
5. concentrationconcentrated
6. custompurified by flash-chromatography