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

HRID 421889노트

반응식

HRID 421889 반응식
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

참가 물질

6

반응물 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

생성물 1

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

시약·촉매·용매 1

HCID 8857Ethyl Acetate용매

반응 조건

온도
92.5 °C

실험 절차

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.

후처리

  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

출처 및 근거

ORD 기록
ord-6229ce4b27ef4e89829df75a7ac79ab2
출처 데이터셋
uspto-grants-2012_01
특허 번호
US08101611B2

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