反应详情

The title compound was prepared according to the procedure described in WO2001046196A 1. A mixture of 3,3-dibromo-4-chloro-1H-pyrrolo[2,3-b]pyridin-2(3H)-one (4.07 g, 12.5 mmol), zinc dust (8.15 g, 125 mmol), AcOH (54.2 ml, 12.5 mmol), and MeOH (54.2 ml, 12.5 mmol) was stirred at rt. After 3 h, the reaction mixture was passed through a pad of celite with an aid of EtOAc. The filtrate was then diluted with brine. The whole was extracted with EtOAc. The organic layer was further washed with brine, dried over MgSO4, filtered, concentrated. The product was purified by column chromatography on silica gel using 70:30 DCM:(90:10:1 DCM:MeOH:NHOH). Fractions containing the product were concentrated. White cotton-like solid, 4-chloro-1H-pyrrolo[2,3-b]pyridin-2(3H)-one was obtained. MS Calcd for C7H5ClN2O: [M]+=168. Found: [M+H]+=169.

1. customThe title compound was prepared
2. extractionThe whole was extracted with EtOAc
3. washThe organic layer was further washed with brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe product was purified by column chromatography on silica gel using 70:30 DCM
8. additionFractions containing the product
9. concentrationwere concentrated