Acetic Acid → 2-(4-Bromo-2-fluorophenylamino)-6-oxo-1,6-dihydropyridine-3-carboxylic acid

HRID 422797ノート

反応式

HRID 422797 の反応式
C[O:2][C:3]([C:5]1[CH:10]=[CH:9][C:8](=[O:11])[NH:7][C:6]=1[NH:12][C:13]1[CH:18]=[CH:17][C:16]([Br:19])=[CH:15][C:14]=1[F:20])=[O:4].COC(=O)C1C=CC(OC)=NC=1NC1C=CC(Br)=CC=1F.C(O)(=O)C.Br>CCOC(C)=O>[Br:19][C:16]1[CH:17]=[CH:18][C:13]([NH:12][C:6]2[NH:7][C:8](=[O:11])[CH:9]=[CH:10][C:5]=2[C:3]([OH:4])=[O:2])=[C:14]([F:20])[CH:15]=1

参加物

6

反応物 4

HCID 176Acetic AcidHCID 260Hydrogen BromideHCID 666734732-(4-Bromo-2-fluorophenylamino)-6-methoxy-nicotinic acid methyl esterHCID 666741252-(4-Bromo-2-fluorophenylamino)-6-oxo-1,6-dihydropyridine-3-carboxylic acid methyl ester

生成物 1

HCID 576368232-(4-Bromo-2-fluorophenylamino)-6-oxo-1,6-dihydropyridine-3-carboxylic acid収率 79%

試薬・触媒・溶媒 1

HCID 8857Ethyl Acetate溶媒

反応条件

温度
92.5 °C

実験手順

Preparation of 2-(4-bromo-2-fluorophenylamino)-6-oxo-1,6-dihydropyridine-3-carboxylic acid methyl ester: To 2-(4-bromo-2-fluorophenylamino)-6-methoxy-nicotinic acid methyl ester (1.00 g, 2.82 mmol) in a sealed flask was added glacial acetic acid (10 mL) and HBr (10 mL, 48 wt % in H2O). The reaction mixture was stirred at 90-95° C. for 2 hours and then cooled to room temperature. The reaction mixture was diluted with EtOAc and washed with H2O, saturated NaHCO3, and saturated NaCl, dried over Na2SO4 and concentrated under reduced pressure. The crude product was triturated twice with dichloromethane/methanol and the resulting solid was collected and dried under vacuum to yield 0.756 g (79%) pure desired product as a white solid.

後処理

  1. temperaturecooled to room temperature
  2. washwashed with H2O, saturated NaHCO3, and saturated NaCl
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated under reduced pressure
  5. customThe crude product was triturated twice with dichloromethane/methanol
  6. customthe resulting solid was collected
  7. customdried under vacuum

出典と根拠

ORDレコード
ord-d4eec7fab7a04bfdb17a593a113daff3
出典データセット
uspto-grants-2012_01
特許番号
US08101639B2

反応ノート

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