反应详情

温度

100 °C

Methyl 2-(3-hydroxyphenoxy)-3-pyridinylacetate (0.8 g) and anhydrous potassium carbonate (0.21 g) were stirred together in DMF under nitrogen at 70° C. After 20 minutes benzyl bromide (1.06 g) was added together with copper bronze (cat.) and the reaction mixture heated to 100° C. for 3 hours. GC analysis indicated 50% reaction. A second equivalent of both potassium carbonate and benzyl bromide was added and heating continued at 100° C. for 2 hours. The reaction mixture was cooled to room temperature, filtered, diluted with water and extracted with ether (×3). The ether extracts were combined, dried, filtered and evaporated to give a brown oil. Chromatography on silica gel (eluent petroleum ether-ether, 50:50) afforded methyl 2-(3-benzyloxyphenoxy)-3-pyridinylacetate as a light yellow solid (0.5 g, 46%).

1. custom50% reaction
2. temperatureheating
3. temperatureThe reaction mixture was cooled to room temperature
4. filtrationfiltered
5. additiondiluted with water
6. extractionextracted with ether (×3)
7. customdried
8. filtrationfiltered
9. customevaporated
10. customto give a brown oil