反应详情

温度

-25 °C

A solution of mesyl chloride (3.44 g) in 50 ml of dry THF was added dropwise under argon to a cooled (−25° C.) solution of 4-(6-acryloyloxyhexyloxy)benzoic acid (8.35 g) and triethylamine (6.07 g) in 100 ml of dry THF. After complete addition (15 min), the reaction mixture was stirred for a further 30 min at −25° C., treated with a solution of 2,5-dihydroxybenzoic-6-acryloyloxyhexyl ester in 50 ml of dry THF and further stirred at −25° C. for 4 h. The reaction mixture was then filtered through celite and the solvent was removed by evaporation. The filtrate was purified by flash chromatography using a short silica-gel column and dichloromethane/diethylether (39/1) as eluent to give 10.8 g of 5-[4-(6-acryloyloxyhexyloxy)benzoyloxy]-2-hydroxybenzoic acid 6-acryloyloxyhexyl ester as a slightly beige oil.

1. additionAfter complete addition (15 min)
2. stirringfurther stirred at −25° C. for 4 h
3. filtrationThe reaction mixture was then filtered through celite
4. customthe solvent was removed by evaporation
5. customThe filtrate was purified by flash chromatography