反应详情

温度

70 °C

Pivalic acid (144 mol, 5 eq) and AgNO3 (3.76 mmol, 0.13 eq) are added to a suspension of the 3-cyanopyridine (29 mmol, 1 eq) in 40 ml H2O. The mixture is stirred for 20 min after which is added 60 ml of a 10% H2SO4 solution. The reaction is stirred for a further 20 min then heated to 70° C. An aqueous solution of (NH4)2S2O8 (8.6 mmol, 1.3 eq) is added dropwise over 30 minutes and the heating is continued for 2 hours or until completion by TLC. After cooling the in ice, 2 N NaOH is added and the reaction is extracted 3 times with ethyl acetate, dried over Na2SO4, filtered and concentration. Purification is performed on silica gel with ethyl acetate/hexanes.

1. stirringThe reaction is stirred for a further 20 min
2. waitthe heating is continued for 2 hours or until completion by TLC
3. temperatureAfter cooling the in ice
4. extractionthe reaction is extracted 3 times with ethyl acetate
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentration
8. customPurification