反应详情

A suspension of ethyl 5-hydroxy-2-methylbenzoate (39.06 g, 217 mmol), 3-chlorobenzyl bromide (31.3 ml, 238 mmol) and potassium carbonate (44.9 g, 325 mmol) in N,N-dimethylformamide (1000 ml) was stirred at room temperature for 18 hours. The reaction was then filtered, diluted with ethyl acetate (2 L), washed with water (2 L then 3×1 L) and brine (1 L), filtered through a hydrophobic frit and concentrated to give the title compound as a dark yellow oil (68.61 g) which was used without further purification. MS (ES+) [C17H1735ClO3+H]+ 305. 1H-NMR (400 MHz, d6-DMSO) δ 1.31 (3H, t, J 7.2), 2.42 (3H, s), 4.28 (2H, q, J 7.2), 5.14 (2H, 2), 7.13-7.16 (1H, m), 7.19-7.23 (1H, m), 7.33-7.45 (4H, m), 7.54-7.55 (1H, m).

1. filtrationThe reaction was then filtered
2. additiondiluted with ethyl acetate (2 L)
3. washwashed with water (2 L
4. filtration3×1 L) and brine (1 L), filtered through a hydrophobic frit
5. concentrationconcentrated