反应详情

温度

0 °C

To a suspension of 4-chloro-3-pyridinecarboxylic acid (3.630 g) in dichloromethane (20 mL) and methanol (8 mL) stirred under argon at 0° C. was added TMS-diazomethane 2M in Et2O (17.28 mL) dropwise. The reaction mixture was stirred at room temperature for 1 h. The solvents were evaporated in vacuo and the crude product was added to a silica gel column and was eluted with cyclohexane/EtOAc=7/3. The evaporation of the collected fractions gave 2.7 g of the title compound as a colourless solid.

1. stirringThe reaction mixture was stirred at room temperature for 1 h
2. customThe solvents were evaporated in vacuo
3. additionthe crude product was added to a silica gel column
4. washwas eluted with cyclohexane/EtOAc=7/3
5. customThe evaporation of the collected fractions