Cesium carbonate → 6-(4-Trifluoromethoxy-phenyl)-pyridine-2-carboxylic acid methyl ester

HRID 33517

반응식

HRID 33517 반응식
[CH3:1][O:2][C:3]([C:5]1[CH:10]=[CH:9][CH:8]=[C:7](Br)[N:6]=1)=[O:4].C(=O)([O-])[O-].[Cs+].[Cs+].[F:18][C:19]([F:31])([F:30])[O:20][C:21]1[CH:26]=[CH:25][C:24](B(O)O)=[CH:23][CH:22]=1>CN(C)C=O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:1][O:2][C:3]([C:5]1[CH:10]=[CH:9][CH:8]=[C:7]([C:24]2[CH:23]=[CH:22][C:21]([O:20][C:19]([F:18])([F:30])[F:31])=[CH:26][CH:25]=2)[N:6]=1)=[O:4]

참가 물질

6

반응물 3

HCID 10796Cesium carbonateHCID 27343864-(Trifluoromethoxy)phenylboronic acidHCID 16217886Methyl 6-bromopyridine-2-carboxylate

생성물 1

HCID 691060816-(4-Trifluoromethoxy-phenyl)-pyridine-2-carboxylic acid methyl ester수율 44.7%

시약·촉매·용매 2

HCID 178418397HCID 178418397, 화합물촉매HCID 6228Dimethylformamide용매

반응 조건

온도
80 °C

실험 절차

162 mg (0.14 mmol)Pd(PPh3)4 was added under argon at room temperature to a solution of 2.0 g (9.25 mmol) methyl-6-bromo-pyridine-2-carboxylate in 46 ml N,N-dimethylformamide and the mixture was heated to 80° C. Then 4.52 g (13.9 mmol) cesium carbonate and 2.1 g (10.18 mmol) of 4-(trifluoromethoxy)phenylboronic acid were added and the mixture was stirred at 80° C. over night. The reaction mixture was cooled to room temperature, filtered, and the filtrate evaporated. The residue was taken up with ethyl acetate, washed twice with water, dried over sodium sulphate and evaporated. Chromatography on silica (eluent: ethyl acetate/n-heptane 1:3) gave 1.23 g (39%) of 6-(4-Trifluoromethoxy-phenyl)-pyridine-2-carboxylic acid methyl ester

후처리

  1. temperatureThe reaction mixture was cooled to room temperature
  2. filtrationfiltered
  3. customthe filtrate evaporated
  4. washwashed twice with water
  5. dry with materialdried over sodium sulphate
  6. customevaporated

출처 및 근거

ORD 기록
ord-3228abf9434f47c796b1731712ce4c8b
출처 데이터셋
uspto-grants-2008_09
특허 번호
US07429605B2

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