反应详情

Sodium methoxide (0.34 g, 6.0 mmol) and methyl formate (1 ml, 16 mmol) were added portionwise to a stirred solution of methyl 2-(6-bromopyrid-2-yloxymethyl)phenylacetate (0.8 g, 2.3 mmol) in dry toluene (10 ml) under a nitrogen atmosphere at room temperature. After 8 hours at room temperature the mixture was poured into water and extracted with ethyl acetate. The ethyl acetate extracts were washed with water, dried and the ethyl acetate removed to give (E)-methyl 2-[2-(6-bromopyrid-2-yloxymethyl)phenyl]-3-hydroxyacrylate (0.82 g, 80%) as a brown gum which was used in the final stage without further purification; 1H NMR (270 MHz)δ: 3.74(3H,s), 5.28(2H,s), 6.66(1H,d), 7.06(1H,d), 7.15-7.55(6H,m), 11.95(1H,d) ppm.

1. extractionextracted with ethyl acetate
2. washThe ethyl acetate extracts were washed with water
3. customdried
4. customthe ethyl acetate removed