反应详情

温度

5 °C

To a flask equiped with a stirrer, dropping funnel, condenser and gas inlet tube maintained under a nitrogen atmosphere there is added at room temperature 67.5 g. (0.5 mole) N-methyl benzamide and 1200 ml. dry tetrahydrofuran. The reaction flask is immersed in an ice bath and cooled to an internal temperature of 5° C. Stirring is initiated and 688 ml. of 1.6 M. n-butyl lithium (1.1 mole) in hexane is added dropwise over about 1 hour maintaining temperature below 8° C. The resulting dilithio salt is stirred at 5° C. for an additional hour and then a solution of 58.5 g. (0.55 mole) of benzaldehyde in 500 ml. tetrahydrofuran is added dropwise in about 1 hour maintaining the temperature between -10° to +10° C. The resulting mixture is stirred at 5° C. for 1 hour longer and 300 ml. of saturated ammonium chloride is added maintaining the temperature at about 10° C. The layers are separated and the organic phase dried over anhydrous magnesium sulfate, filtered and evaporated in vacuo to give α-hydroxy-N-methyl-α-phenyl-o-toluamide.

1. customTo a flask equiped with a stirrer
2. temperaturemaintained under a nitrogen atmosphere
3. additionthere is added at room temperature 67.5 g
4. customThe reaction flask is immersed in an ice bath
5. temperaturemaintaining temperature below 8° C
6. temperaturemaintaining the temperature between -10° to +10° C
7. stirringThe resulting mixture is stirred at 5° C. for 1 hour longer
8. temperaturemaintaining the temperature at about 10° C
9. customThe layers are separated
10. dry with materialthe organic phase dried over anhydrous magnesium sulfate
11. filtrationfiltered
12. customevaporated in vacuo