반응 #59794

반응 방정식

Chloroacetyl chloride

[4,5-Bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluoromethyl-phenyl)-4,5-dihydro-imidazol-1-yl]-piperazin-1-yl-methanone

3-{4-[4,5-bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluoromethyl-phenyl)-4,5-dihydro-imidazole-1-carbonyl]-piperazin-1-yl}-propionitrile hydrochloride

diisopropylethylamine

→

1-{4-[4,5-bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluoromethyl-phenyl)-4,5-dihydro-imidazole-1-carbonyl]-piperazin-1-yl}-2-chloro-ethanone

수율 46.0%

용매

methylene chloride

methylene chloride

methylene chloride

반응 조건

후처리

1. 1
   온도cooled to ice temperature
2. 2
   세척washed with water
3. 3
   건조The organic layers were dried over anhydrous magnesium sulfate
4. 4
   여과The solids were filtered off
5. 5
   농축the filtrate was concentrated
6. 6
   기타Purification of the crude material by flash chromatography

실험 절차

[4,5-Bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluoromethyl-phenyl)-4,5-dihydro-imidazol-1-yl]-piperazin-1-yl-methanone (372 mg, 0.63 mmol, example 8A) and diisopropylethylamine (230 uL, 1.32 mmol) were dissolved in methylene chloride (4 mL) and cooled to ice temperature. Chloroacetyl chloride (100 uL, 1.26 mmol) in methylene chloride (1 mL) was added dropwise and this mixture was stirred for 30 min at ice temperature. The reaction was diluted with methylene chloride and washed with water. The organic layers were dried over anhydrous magnesium sulfate. The solids were filtered off, and the filtrate was concentrated. Purification of the crude material by flash chromatography using ethyl acetate and hexanes gave 1-{4-[4,5-bis-(4-chloro-phenyl)-2-(2-ethoxy-4-trifluoromethyl-phenyl)-4,5-dihydro-imidazole-1-carbonyl]-piperazin-1-yl}-2-chloro-ethanone (193 mg, 0.29 mmol).

출처