反应详情

温度

0 °C

Sodium hydride (4.83 g, 0.12 mol) was added into cyclopropanemethanol (CAN 2516-33-8, 30 g) at 0° C. and the mixture was stirred at 0° C. for 1 h. Then to the mixture was added methyl 5-bromo-6-chloro-pyridine-2-carboxylic acid methyl ester (3 g, 12.75 mmol). The obtained solution was heated to 90° C. for 2 h. Then the mixture was evaporated to dryness, the residue was dissolved in 40 mL of water, and adjusted to pH=4 with hydrochloric acid (3 N), and extracted with ethyl acetate (3×30 mL). The combined organic layer was washed with water (2×30 mL) and brine (2×50 mL) then evaporated to dryness to obtain the product as a white solid (2.5 g, 76.7%); MS (EI): m/e=272.0 [MH+].

1. temperatureThe obtained solution was heated to 90° C. for 2 h
2. customThen the mixture was evaporated to dryness
3. dissolutionthe residue was dissolved in 40 mL of water
4. extractionextracted with ethyl acetate (3×30 mL)
5. washThe combined organic layer was washed with water (2×30 mL) and brine (2×50 mL)
6. customthen evaporated to dryness