反应详情

A solution of methyl 2,2-dimethyl-3-hydroxypropionate (5.0 g, 37.8 mmol) in DMF (75 mL) was cooled to 0° C. and treated with imidazole (3.86 g, 56.7 mmol) then tert-butyl diphenylchlorosilane (11.8 mL, 45.4 mmol). The mixture was stirred at RT for 22 h then concentrated in vacuo. The residue was partitioned between EtOAc and water. The phases were separated and the aqueous layer was extracted with EtOAc (×2). The combined organic phase was washed with 10% aqueous citric acid solution, saturated aqueous sodium bicarbonate solution and brine, dried (Na2SO4) and concentrated in vacuo to give the title compound as a golden oil (15.93 g, quant.). LCMS (Method 3): Rt 5.32 min, m/z 393.3 [M+Na+].

1. concentrationthen concentrated in vacuo
2. customThe residue was partitioned between EtOAc and water
3. customThe phases were separated
4. extractionthe aqueous layer was extracted with EtOAc (×2)
5. washThe combined organic phase was washed with 10% aqueous citric acid solution, saturated aqueous sodium bicarbonate solution and brine
6. dry with materialdried (Na2SO4)
7. concentrationconcentrated in vacuo