反应详情

A solution of 2-(benzyloxy)ethanol (2.00 g) and tetrabutylammonium bromide (84 mg) in 1,6-dibromohexane (6.06 ml) was treated with 50% w/v sodium hydroxide solution (5.0 ml) and the mixture was vigorously stirred for 18 h at 20°. Water (50 ml) was added and the mixture was extracted with dichloromethane (40 ml). The organic extract was dried (Na2SO4) and the solvent evaporated in vacuo to give a residue which was purified by flash chromatography on silica gel. Elution with EtOAc-PE (1:9) gave the title compound (2.87 g). LCMS RT=3.94 min, ES+ve 337 (MNa)+, 339 (MNa)+

1. extractionthe mixture was extracted with dichloromethane (40 ml)
2. extractionThe organic extract
3. dry with materialwas dried (Na2SO4)
4. customthe solvent evaporated in vacuo
5. customto give a residue which
6. customwas purified by flash chromatography on silica gel
7. washElution with EtOAc-PE (1:9)