反应详情

To NaOtBu (1.57 g, 16.4 mmol) in HMPA (6 mL) was added DMF (6 mL) (to facilitate stirring). 5-Fluoropyridine-2-carbonitrile (1.00 g, 8.19 mmol) was added and the dark mixture was stirred overnight. The mixture was diluted with water (100 mL), extracted with DCM (3×50 mL) and the organics were washed with water (50 mL) and sat. aq. NaHCO3 (50 mL), dried over MgSO4, evaporated and purified by column chromatography (0-50% EtOAc/hex) to give 5-tert-butoxypyridine-2-carbonitrile (0.90 g, 62%) as a yellow solid. ESI-MS m/z calc. 211.1, found 211.9 (M+1)+; Retention time: 0.97 minutes (3 min run). 1H NMR (400 MHz, CDCl3) δ 8.38 (dd, J=2.7, 0.5 Hz, 1H), 7.67-7.56 (m, 1H), 7.41-7.31 (m, 1H), 1.52-1.38 (m, 10H).

1. extractionextracted with DCM (3×50 mL)
2. washthe organics were washed with water (50 mL) and sat. aq. NaHCO3 (50 mL)
3. dry with materialdried over MgSO4
4. customevaporated
5. custompurified by column chromatography (0-50% EtOAc/hex)