Ethyl trifluoroacetate → 4,4,4-Trifluoro-1-(pyridin-2-yl)butane-1,3-dione

反応式

C(O[C:4](=[O:9])[C:5]([F:8])([F:7])[F:6])C.[N:10]1[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=1[C:16](=[O:18])[CH3:17].C[O-].[Na+]>CO>[F:8][C:5]([F:6])([F:7])[C:4](=[O:9])[CH2:17][C:16]([C:11]1[CH:12]=[CH:13][CH:14]=[CH:15][N:10]=1)=[O:18]

参加物

実験手順

Trifluoro-acetic acid ethyl ester (9.82 mL, 82.5 mmol) was added to a solution of 1-pyridin-2-yl-ethanone (5.00 g, 41.2 mmol) in methanol (40 mL) containing sodium methoxide (61.8 mmol). The reaction mixture was heated at reflux overnight, concentrated under reduced pressure and acidified with aqueous hydrochloric acid (10%). The aqueous solution was extracted with ethyl acetate (10×50 mL). The organic layers were collected, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was purified by column chromatography on silica gel to give 4,4,4-trifluoro-1-pyridin-2-yl-butane-1,3-dione (7.26 g, 81%).