反应详情

温度

80 °C

A mixture of (E)-methyl 2-[2-(bromomethyl)phenyl]-3-methoxypropenoate (10.0 g, 90% pure), sodium hydrogen orthophosphate dibasic (Na2HPO4, 5.74 g) and potassium hydrogen monophosphate monobasic (KH2PO4, 0.55 g) in DMSO (20 ml) was heated at 80° C. for 1 hour and then at 110° C. for a further hour (compare J. H. Babler, M. J. Coghlan, M. Feng and P. Fries, J. Org. Chem., 1979, 44, 1716). After cooling, the reaction mixture was poured into water and extracted with ether. The extracts were washed with brine, dried, concentrated and chromatographed using ether as eluant to give (E) -methyl 2-(2-formylphenyl)-3-methoxypropenoate (2.77 g, 40% yield) as a white crystalline solid, m.p. 67°-69° C. IR (nujol): 1710, 1634 cm-1. 1H NMR: delta 3.72 (3H, s), 3.84 (3H, s), 7.30-7.65 (3H, m), 7.69 (1H, s), 7.9 (1H, m), 10.0 (1H, s) ppm.

1. waitat 110° C. for a further hour (compare J. H. Babler, M. J. Coghlan, M. Feng and P. Fries, J. Org. Chem., 1979, 44, 1716)
2. temperatureAfter cooling
3. extractionextracted with ether
4. washThe extracts were washed with brine
5. customdried
6. concentrationconcentrated
7. customchromatographed