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Tributylstannane → 2-Fluoro-5-(6-methylpyridin-3-yloxy)benzenamine

HRID 1711620
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HRID 1711620 반응식
[H-].[Na+].C(=S)=S.CI.C(SC)(=S)O[CH2:10][C:11]1[CH:16]=[CH:15][C:14]([O:17][C:18]2[CH:23]=[CH:22][C:21]([F:24])=[C:20]([NH2:25])[CH:19]=2)=[CH:13][N:12]=1.C([SnH](CCCC)CCCC)CCC.CC(N=NC(C#N)(C)C)(C#N)C>C1COCC1.C1(C)C=CC=CC=1>[F:24][C:21]1[CH:22]=[CH:23][C:18]([O:17][C:14]2[CH:13]=[N:12][C:11]([CH3:10])=[CH:16][CH:15]=2)=[CH:19][C:20]=1[NH2:25]
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참가 물질

9

반응물 6

HCID 5948TributylstannaneHCID 6328Methyl iodideHCID 6348Carbon DisulfideHCID 6547AzobisisobutyronitrileHCID 24758Sodium hydrideHCID 86619669O-(5-(3-amino-4-fluorophenoxy)pyridin-2-yl)methyl S-methyl carbonodithioate

생성물 1

HCID 67252279
2-Fluoro-5-(6-methylpyridin-3-yloxy)benzenamine
수율 56.7%

시약·촉매·용매 2

HCID 1140Toluene용매HCID 8028Tetrahydrofuran용매

반응 조건

온도
0 °C

실험 절차

NaH (100 mg, 3.3 mmol) was slowly added to a solution of Example A12 (0.50 g, 2.1 mmol) in dry THF (50 mL) at 0° C. After 30 min, CS2 (0.49 g, 6.4 mmol) was added and the reaction mixture was stirred at 0° C. for 1 hour. Methyl iodide (2.4 g, 17 mmol) was added at 0° C. and the reaction mixture was allowed to warm to RT overnight. The solvent was removed under reduced pressure to obtain the crude product. The crude, O-(5-(3-amino-4-fluorophenoxy)pyridin-2-yl)methyl S-methyl carbonodithioate (0.69 g, 2.1 mmol) was dissolved in toluene (5 mL) and tributyltin hydride (1 mL) and AIBN (50 mg) were added. The reaction mixture was heated under reflux for 3 hours. The solvent was removed under reduced pressure and the residue was filtered and washed with CH2Cl2. The filtrate was evaporated and the residue was purified by silica gel column chromatography to obtain 2-fluoro-5-(6-methylpyridin-3-yloxy)benzenamine (0.26 g, 56% yield). 1H NMR (400 MHz, DMSO-d6) δ 8.20 (d, J=2.8 Hz, 1H), 7.30 (dd, J=2.8, and 8.4 Hz, 1H), 7.25 (d, J=8.4 Hz, 1H), 6.97 (dd, J=8.8, 11.6 Hz, 1H), 6.38 (dd, J=3.2, 7.6 Hz, 1H), 6.13 (dt, J=3.2, 8.8 Hz, 1H), 5.31 (s, 1H), 2.44 (s, 3H); MS (ESI) m/z: 219.0 (M+H+).

후처리

  1. temperatureto warm to RT overnight
  2. customThe solvent was removed under reduced pressure
  3. customto obtain the crude product
  4. temperatureThe reaction mixture was heated
  5. temperatureunder reflux for 3 hours
  6. customThe solvent was removed under reduced pressure
  7. filtrationthe residue was filtered
  8. washwashed with CH2Cl2
  9. customThe filtrate was evaporated
  10. customthe residue was purified by silica gel column chromatography

출처 및 근거

ORD 기록
ord-912d602169c84fb985f58b245f561e76
출처 데이터셋
uspto-grants-2010_09
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US07790756B2

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