Lithium Hydroxide → 2-Methoxy-4-methyl-6-(3-trifluoromethyl-phenyl)-nicotinic acid

HRID 1517067노트

반응식

HRID 1517067 반응식
C[O:2][C:3](=[O:23])[C:4]1[C:9]([CH3:10])=[CH:8][C:7]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([C:17]([F:20])([F:19])[F:18])[CH:12]=2)=[N:6][C:5]=1[O:21][CH3:22].[OH-].[Li+].Cl.O>C1COCC1.CO>[CH3:22][O:21][C:5]1[N:6]=[C:7]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([C:17]([F:20])([F:18])[F:19])[CH:12]=2)[CH:8]=[C:9]([CH3:10])[C:4]=1[C:3]([OH:23])=[O:2]

참가 물질

5

반응물 3

HCID 3939Lithium HydroxideHCID 21885828Hydrate;hydrochlorideHCID 57441128HCID 57441128, 화합물2회

생성물 1

HCID 574411372-Methoxy-4-methyl-6-(3-trifluoromethyl-phenyl)-nicotinic acid수율 77.1%

시약·촉매·용매 1

HCID 21899815MeOH tetrahydrofuran용매

실험 절차

To a solution of 0.325 g (1.00 mmol) of 2-methoxy-4-methyl-6-(3-trifluoromethyl-phenyl)-nicotinic acid methyl ester (intermediate 5C) in 20 ml of THF/MeOH (1:1) was added 2.50 ml (2.50 mmol) of lithium hydroxide solution (1 molar in water) drop by drop and the reaction mixture was then heated up to reflux. After 8 hours, it was poured into crashed ice and acidified with HCl/H2O (1N) to pH 3.0 and then extracted twice with EtOAc; the organic phases were washed with water, dried over magnesium sulfate, filtered and evaporated. The residue was purified by flash column chromatography (CH2Cl2/MeOH 1:0 to 4:1) to give 0.24 g (77%) of the title compound as light yellow solid. MS: 310.0 (M−H−).

후처리

  1. temperaturethe reaction mixture was then heated up
  2. temperatureto reflux
  3. additionit was poured
  4. extractionextracted twice with EtOAc
  5. washthe organic phases were washed with water
  6. dry with materialdried over magnesium sulfate
  7. filtrationfiltered
  8. customevaporated
  9. customThe residue was purified by flash column chromatography (CH2Cl2/MeOH 1:0 to 4:1)

출처 및 근거

ORD 기록
ord-2c73d2bf00ce45a3b63a7792bae5cf7b
출처 데이터셋
uspto-grants-2012_07
특허 번호
US08227613B2

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