反应详情

DEAD (2.6 mL, 16.4 mmol, 1.3 Eq.) was added dropwise to a stirred solution of methyl-3-hydroxythiophene-2-carboxylate (2.0 g, 12.6 mmol, 1.0 Eq.), 1-(2-chlorophenyl)ethanol (2.57 g, 16.4 mmol, 1.3 Eq.) and triphenylphosphine (4.31 g, 16.4 mmol, 1.3 Eq.) in ahydrous THF (30 mL) at 0° C. under nitrogen. The reaction was allowed to warm to ambient temperature overnight. The crude reaction mixture was absorbed onto SiO2 and purified by column chromatography eluting with 0 to 10% EtOAc/petroleum ether to give the sub-title compound as a white solid (1.89 g, 6.37 mmol, 50%); 1H NMR (400 MHz, CDCl3) δ 1.72 (3H, d), 3.87 (3H, s), 5.78 (1H, quint), 6.65 (1H, d), 7.21-7.32 (3H, m), 7.38 (1H, dd), 7.55 (1H, dd).

1. customThe crude reaction mixture
2. customwas absorbed onto SiO2
3. custompurified by column chromatography
4. washeluting with 0 to 10% EtOAc/petroleum ether