反应详情

A solution of 1-(3-(methoxymethoxy)-6-neopentylpyridin-2-yl)ethanone (3.75 g, 15 mmol) in (2:1:1) 5 M HCl: i-PrOH:THF (100 mL) was stirred 16 h at rt. The mixture was concentrated to remove the THF and i-PrOH. The resulting solution consisting of the product in aqueous HCl was quenched by slow addition to a solution of saturated aqueous NaHCO3 (500 mL) containing excess solid NaHCO3 (28 g). The aqueous layer was extracted with CH2Cl2 (3×100 mL), the organic layers combined and washed with saturated aqueous NaCl (100 mL), dried (MgSO4), and concentrated to give the crude product as a brown oil. The product was purified by ISCO (0-10% EtOAc/Hexanes) to give 1-(3-hydroxy-6-neopentylpyridin-2-yl)ethanone (1.98 g, 64% yield) as a clear, colorless oil.

1. concentrationThe mixture was concentrated
2. customto remove the THF and i-PrOH
3. customwas quenched by slow addition to a solution of saturated aqueous NaHCO3 (500 mL)
4. additioncontaining excess solid NaHCO3 (28 g)
5. extractionThe aqueous layer was extracted with CH2Cl2 (3×100 mL)
6. washwashed with saturated aqueous NaCl (100 mL)
7. dry with materialdried (MgSO4)
8. concentrationconcentrated
9. customto give the crude product as a brown oil
10. customThe product was purified by ISCO (0-10% EtOAc/Hexanes)