反応 #1960519

反応方程式

2-(6-hydroxy-naphthalen-2-yl)-propionic acid methyl ester

pyridine

bromoacetyl chloride

→

2-[6-(2-bromo-acetoxy)-naphthalen-2-yl]-propionic acid methyl ester

収率 45.9%

溶媒

dichloromethane

反応条件

後処理

1. 1
   洗浄The reaction mixture was washed with water (500 ml) and 5% solution of sodium carbonate
2. 2
   乾燥by drying over sodium sulphate and distillation
3. 3
   その他to get crude compound, which
4. 4
   その他was purified by column chromatography

実験手順

To a solution of 2-(6-hydroxy-naphthalen-2-yl)-propionic acid methyl ester (20 grams) and pyridine (10.3 grams) in dichloromethane (200 ml) maintained at 0-5° C. under N2 atmosphere was added dropwise bromoacetyl chloride (19.6 grams). The reaction was stirred at the same temperature for one hour. The reaction mixture was washed with water (500 ml) and 5% solution of sodium carbonate followed by drying over sodium sulphate and distillation to get crude compound, which was purified by column chromatography using hexane as eluant to get pure 2-[6-(2-bromo-acetoxy)-naphthalen-2-yl]-propionic acid methyl ester (14 grams) as a dark brown syrup. The pure product was characterized using 1H NMR spectroscopy in CDCl3 δ 1.55 (d, 3H, CH3), 3.65 (s, 3H, Ester), 3.82 (q, 1H, CH), 4.08 (s, 2H, OCH2) 7.20 (dd, 1H, Ar), 7.4 (dd, 1H, Ar), 7.57 (d, 1H, Ar), 7.72 (d, 1H, Ar), 7.78 (d, 1H, Ar), 7.84 (d, 1H, Ar).

出典