反応 #44205
ord-f6d2477054d24096a391b79106993b2f
反応方程式
反応物
試薬
反応条件
後処理
- 1抽出extracted with ethyl acetate
- 2乾燥The combined organic extracts were dried (MgSO4)
- 3濃縮concentrated under reduced pressure
- 4その他Purification by flash column chromatography (5% to 10% MeOH in methylene chloride)
- 5その他gave 70 mg partially pure intermediate adduct
- 6温度After cooling to room temperature
- 7洗浄washed with water
- 8乾燥dried (MgSO4)
- 9濃縮concentrated under reduced pressure
- 10その他Purification by flash column chromatography (twice) (4% MeOH in methylene chloride)
実験手順
A mixture of 4-(4-bromo-2-fluorophenylamino)-5-fluoro-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid (200 mg, 0.557 mmol), EDCI (214 mg, 1.11 mmol) and HOBt (151 mg, 1.11 mol) were stirred in DMF (10 mL) for 30 minutes. Thiosemicarbazide (51 mg, 0.562 mmol) and Et3N (0.116 mL, 1.5 mmol) were added. After 1 hour, the reaction mixture was diluted with saturated aqueous NH4Cl, and extracted with ethyl acetate. The combined organic extracts were dried (MgSO4) and concentrated under reduced pressure. Purification by flash column chromatography (5% to 10% MeOH in methylene chloride) gave 70 mg partially pure intermediate adduct. PPh3 (78 mg, 0.30 mmol), Et3N (0.10 mL, 0.74 mmol), and CCl4 (0.029 mL, 0.30 mmol) were added to a stirred suspension of intermediate adduct (40 mg, 0.093 mmol) in 1:1 methylene chloride:MeCN (4 mL). The reaction mixture was heated to 50° C. for 5 hours. After cooling to room temperature, the reaction mixture was diluted with ethyl acetate, washed with water, dried (MgSO4) and concentrated under reduced pressure. Purification by flash column chromatography (twice) (4% MeOH in methylene chloride) gave clean desired product (10 mg, 33%); MS APCI (+) m/z 414, 416 (M+, Br pattern) detected; 1H NMR (400 MHz, CD3OD) δ 7.80 (s, 1H), 7.31 (dd, 1H), 7.25 (d, 1H), 7.02 (td, 1H), 3.64 (s, 3H).