反应详情

To dimethylamino(methyl)aluminum chloride [prepared from dimethylamine hydrochloride (3.4 g, 42 mmoL) and trimethyl aluminum (21 mL of 2 M solution, 42 mmol)] in toluene (40 mL) was added methyl benzylglycolate (3.0 g, 17 mmol). After stirring at rt for 1.5 h, the mixture was poured into 3 N HCl and extracted with Et2O. The organic extract was washed with saturated aqueous NaCl, dried (MgSO4) and concentrated under reduced pressure. The residue was purified by flash chromatography, eluting with a solvent gradient of 9-50% EtOAc/Hex. The title compound was obtained as a colorless oil (1.2 g, 37%): 1H NMR CDCl3): d 7.4-7.1 (m, 5H); 4.61 (s, 2H); 4.18 (s, 2H); 2.98 (s, 3H); 2.95 (s, 3H).

1. extractionextracted with Et2O
2. extractionThe organic extract
3. washwas washed with saturated aqueous NaCl
4. dry with materialdried (MgSO4)
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by flash chromatography
7. washeluting with a solvent gradient of 9-50% EtOAc/Hex