反应详情

温度

0 °C

A solution of 11.8 g (133.4 mmol) of trans 2-butene-1,4-diol in 100 ml of DMF was treated with 6.4 g (147 mmol) of sodium hydride dispersion on oil (55%), stirred at 0° C. for 45 min., and treated dropwise with 25.1 g (160 mmol) of 4-methoxybenzylchloride. The mixture was stirred during 5 hrs at RT and then poured into a saturated aqueous solution of NaCl. Extraction with AcOEt, drying of the combined organic phases over Na2SO4, filtration, evaporation of the solvent and chromatography on silica gel with heptane/AcOEt 9:1 gave 5.7 g (21%) of trans 4-(4-methoxy-benzyloxy)-but-2-en-1-ol. Light yellow oil. MS: 207 (M−H)−.

1. stirringThe mixture was stirred during 5 hrs at RT
2. extractionExtraction with AcOEt
3. dry with materialdrying of the combined organic phases over Na2SO4, filtration, evaporation of the solvent and chromatography on silica gel with heptane/AcOEt 9:1