反応式
C([Li])CCC.Br[C:7]1[CH:12]=[CH:11][C:10]([C:13]([F:16])([F:15])[F:14])=[CH:9][C:8]=1[S:17][CH3:18].[C:19](=[O:21])=[O:20].Cl>CCOCC>[CH3:18][S:17][C:8]1[CH:9]=[C:10]([C:13]([F:16])([F:15])[F:14])[CH:11]=[CH:12][C:7]=1[C:19]([OH:21])=[O:20]参加物
反応条件
- 温度
- -70 °C
実験手順
n-Butyllithium (2.5M solution in hexane; 25 ml) was added under an inert atmosphere to a stirred solution 4-bromo-3-methylsulphenylbenzotrifluoride (16.4 g) in ether whilst maintaining the temperature below -70° C. The mixture was stirred at -70° C. for 2 hours and then poured onto solid carbon dioxide pellets. The mixture was stirred for 10 minutes and aqueous hydrochloric acid was added. The layers were separated and the aqueous layer was extracted with ether. The combined organic layers were washed with water, dried (anhydrous magnesium sulphate) and filtered. The filtrate was evaporated and the residue was triturated with cyclohexane and filtered to give 2-methylsulphenyl-4-trifluoromethylbenzoic acid (12.4 g) as a white solid, NMR [CDCl3 +DMSO-d6 ]: 2.45 (s,3H), 7.2(d, 1H), 7.3(s, 1H), 8.0 (d, 1H), 10.7-11.1 (bs, 1H).
後処理
- temperaturewhilst maintaining the temperature below -70° C
- stirringThe mixture was stirred for 10 minutes
- customThe layers were separated
- extractionthe aqueous layer was extracted with ether
- washThe combined organic layers were washed with water
- dry with materialdried (anhydrous magnesium sulphate)
- filtrationfiltered
- customThe filtrate was evaporated
- customthe residue was triturated with cyclohexane
- filtrationfiltered
出典と根拠
- ORDレコード
- ord-a6fbdd378e2747e8954f2dd49973b3d8
- 出典データセット
- uspto-grants-1997_07
- 特許番号
- US05650533
関連ノート
読み込み中…