4-Chloro-2-nitroaniline → HCID 10846711、化合物
反応式
CO[CH:3]1[CH2:7][CH2:6][CH:5](OC)O1.[Cl:10][C:11]1[CH:17]=[CH:16][C:14]([NH2:15])=[C:13]([N+:18]([O-:20])=[O:19])[CH:12]=1>C(O)(=O)C>[Cl:10][C:11]1[CH:17]=[CH:16][C:14]([N:15]2[CH:3]=[CH:7][CH:6]=[CH:5]2)=[C:13]([N+:18]([O-:20])=[O:19])[CH:12]=1参加物
4
実験手順
100 g (0.75 mole) of 2,5-dimethoxytetrahydrofuran are added dropwise to a stirred solution of 86.3 g (0.5 mole) of 4-chloro-2-nitroaniline in 500 ml. of glacial acetic acid. The solution is refluxed under a nitrogen atmosphere for 30 minutes, filtered, and poured into 2500 ml. of water. The aqueous solution is extracted with chloroform. The chloroform solution is dried with anhydrous sodium sulfate and concentrated to a brown oil. The brown oil is dissolved in an ether-petroleum ether-mixture and placed in a refrigerator overnight. An orange solid precipitates and is recrystallized from an ether petroleum ether mixture to give 1-(4-chloro-2-nitrophenyl) pyrrole, m.p. 55°-56° C.