反应详情

2-Benzylpyridine (6.1 g.) dissolved in 25 ml. of dry benzene is added dropwise to 20 ml. of 2M phenyl lithium in benzene/ether with cooling. The mixture is stirred for 30 minutes, then 2.6 g. of methyl isothiocyanate, dissolved in 40 ml. of dry benzene, is added dropwise with cooling. The resulting solution is stirred overnight. An equal volume of water is added and the solution is cooled and made acidic with 10% aqueous hydrochloric acid. The phases are separated, the organic phase is washed with water and the combined aqueous phases are made basic to about pH 9, then extracted with chloroform. The chloroform extracts are washed with water and dried over magnesium sulfate. Filtration and removal of solvent gives a residue which is recrystallized from isopropyl ether/ethanol to give N-methyl-2-phenyl-2-(2-pyridyl)thioacetamide.

1. temperaturewith cooling
2. stirringThe resulting solution is stirred overnight
3. temperaturethe solution is cooled
4. customThe phases are separated
5. washthe organic phase is washed with water
6. extractionextracted with chloroform
7. washThe chloroform extracts are washed with water
8. dry with materialdried over magnesium sulfate
9. filtrationFiltration and removal of solvent
10. customgives a residue which
11. customis recrystallized from isopropyl ether/ethanol