反应详情

A mixture of 22.0 g (0.105 mole) of 2-methyl-3-nitrophenylacetic acid (V. Askam et al., J. Chem. Soc. (C) 1969 1935) and 25 cc of thionyl chloride was slowly heated to 75° and the copious evolution of gasses allowed to moderate. The temperature was raised and the solution was refluxed for 1 hour. The reaction was concentrated in vacuo. The residual straw-colored syrup was chased several times with dry toluene, diluted with 100 cc of dry toluene and added to a cool (10°) mixture of 13 g of sodium carbonate in 150 cc of water and 150 cc of toluene containing 14.5 cc (10.6 g, 0.12 mole) of di-n-propylamine with very slow stirring. After 30 minutes, the ice-bath was removed. Stirring was continued for one hour. An additional 0.5 g of solid sodium carbonate was added to the reaction. After 15 minutes, the organic phase was separated, washed with 5% aqueous sodium carbonate followed by 2N hydrochloric acid and, finally water. The organic solution was dried over magnesium sulfate, concentrated in vacuo and pumped free of solvent to give 29.5 g of 2-methyl-3-nitrophenyl-N,N-di-n-propyl acetamide as a straw-colored syrup.

1. temperaturewas slowly heated to 75°
2. temperatureThe temperature was raised
3. temperaturethe solution was refluxed for 1 hour
4. concentrationThe reaction was concentrated in vacuo
5. additiondiluted with 100 cc of dry toluene
6. additionadded to
7. temperaturea cool
8. customthe ice-bath was removed
9. waitwas continued for one hour
10. additionAn additional 0.5 g of solid sodium carbonate was added to the reaction
11. waitAfter 15 minutes
12. customthe organic phase was separated
13. washwashed with 5% aqueous sodium carbonate
14. dry with materialThe organic solution was dried over magnesium sulfate
15. concentrationconcentrated in vacuo