Phosphorus oxychloride → 5-(Hexadecyloxy)thiophene-2-carbaldehyde
反応式
CN([CH:9]=[O:10])C1C=CC=CC=1.P(Cl)(Cl)(Cl)=O.[CH2:16]([O:32][C:33]1[S:34][CH:35]=[CH:36][CH:37]=1)[CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH3:31]>>[CH2:16]([O:32][C:33]1[S:34][C:35]([CH:9]=[O:10])=[CH:36][CH:37]=1)[CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH3:31]参加物
反応条件
- 温度
- 70 °C
実験手順
To a cooled mixture of 27 g of N-methylformanilide and 27 g (0.176 mole) of phosphorus oxychloride is added 32.5 g (0.1 mole) of 2-hexadecyloxythiophene. The mixture is warmed to 70° C under vacuum (10 mm Hg). The mixture is allowed to stand at 60°-70° C for 7 hours, then overnight at room temperature after which the mixture is stirred into 100 g of ice. The mixture is extracted into benzene, washed with water, dried over sodium sulfate and distilled in vacuo to give 5-hexadecyloxy-2-thiophenecarboxaldehyde. The carboxaldehyde (7.1 g, 0.02 mole) is stirred vigorously with 4 g of potassium hydroxide in 2.6 ml of water for 24 hours. The mixture is diluted with water and extracted into ether. The aqueous layer is separated and acidified with hydrochloric acid precipitating 5-(hexadecyloxy)-2 -thiophenecarboxylic acid.
後処理
- extractionThe mixture is extracted into benzene
- washwashed with water
- dry with materialdried over sodium sulfate
- distillationdistilled in vacuo
出典と根拠
- ORDレコード
- ord-429f47ccd1c2489a8857bc7c12e6e05a
- 出典データセット
- uspto-grants-1977_03
- 特許番号
- US04011333
反応ノート
読み込み中…