反応 #5368

反応方程式

isopropanol

N,O-dimethylhydroxylamine hydrochloride

sodium bicarbonate

N-(bromoethyl)phthalimide

→

N-(2-chloroethyl)-phthalimide

収率 65.4%

溶媒

triethylamine

反応条件

後処理

1. 1
   温度the mixture was refluxed for 29 hours
2. 2
   抽出extracted with chloroform
3. 3
   その他The organic layer was separated
4. 4
   洗浄was washed with water
5. 5
   乾燥dried over magnesium sulfate
6. 6
   workup.DISTILLATIONChloroform was distilled off
7. 7
   その他the residue was purified by column chromatography on silica gel

実験手順

To a suspension of 50 ml of isopropanol containing N,O-dimethylhydroxylamine hydrochloride (3.90 g, 40.0 mmol) was added dropwise 5.56 ml of triethylamine. The resulting mixture became homogeneous after 5 minutes. Thereto was added 2.45 g (10.0 mmol) of N-(bromoethyl)phthalimide and the mixture was refluxed for 29 hours. This was cooled to room temperature, then poured into 200 ml of a saturated aqueous solution of sodium bicarbonate and extracted with chloroform. The organic layer was separated and was washed with water and dried over magnesium sulfate. Chloroform was distilled off and the residue was purified by column chromatography on silica gel. Development with 30% hexane-chloroform resulted in elution of 1.37 g of N-(2-chloroethyl)-phthalimide and further development with chloroform resulted in 0.964 g (yield: 41%) of white cyrstals of N-[2-(N-methoxy-N-methylamino)ethyl]phthalimide.

出典