反应详情

温度

100 °C

A solution of 2-(tert-butoxycarbonylamino)phenylboronic acid (1.0 eq.) and 3-bromopicolino-nitrile (1.0 eq.) in toluene (0.44 M) was mixed with tetrakis(triphenyl-phosphine)palladium (5 mol %) and 2N aqueous potassium carbonate solution (2.0 eq.). The reaction was heated to 100° C. and stirred overnight. After cooling to ambient temperature, the reaction content was diluted with 2% methanol in dichloromethane and water. The two phases were separated, and the aqueous layer was extracted twice with 2% methanol in dichloromethane. The combined organic layers were washed with brine, dried over anhydrous MgSO4, and concentrated en vacuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-80% ethyl acetate in hexane to give a white solid. 1H NMR (acetone d-6): δ 9.04 (d, 1H), 8.91 (d, 1H), 8.45 (d, 1H), 7.86 (dd, 1H), 7.53-7.62 (m, 2H), 7.35 (t, 1H), 6.65 (br, 2H). LRMS [M+H]=196.1

1. temperatureAfter cooling to ambient temperature
2. customThe two phases were separated
3. extractionthe aqueous layer was extracted twice with 2% methanol in dichloromethane
4. washThe combined organic layers were washed with brine
5. dry with materialdried over anhydrous MgSO4
6. concentrationconcentrated en vacuo
7. customThe crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO)
8. customto give a white solid