反应详情

To 90 ml of benzene were added 1.0 g (5.9/1000 mole) of 3-chloro-4-isopropylaniline, 0.7 g of triethylamine, and 0.8 g (6.8/1000 mole) of 1-methylcyclopropanecarboxylic acid chloride. The mixture was stirred for 1 hour at 5° to 10° C. The precipitated crystals were separated by filtration, and the filtrate was washed with a saturated aqueous solution of sodium hydrogen carbonate and dried over anhydrous sodium sulfate. The resulting dried filtrate was concentrated by an evaporator. The resulting oily product was isolated and purified by silica gel column chromatography [eluent: benzene/ethyl acetate=40/1 (v/v)] to give 1.3 g of N-(3-chloro-4-isopropylphenyl)-1-methylcyclopropanecarboxamide as an oil in a yield of 87.6 % based on 3-chloro-4-isopropylaniline. On standing for a long period of time, the oil crystallized.

1. customThe precipitated crystals were separated by filtration
2. washthe filtrate was washed with a saturated aqueous solution of sodium hydrogen carbonate
3. dry with materialdried over anhydrous sodium sulfate
4. concentrationThe resulting dried filtrate was concentrated by an evaporator
5. customThe resulting oily product was isolated
6. custompurified by silica gel column chromatography [eluent: benzene/ethyl acetate=40/1 (v/v)]