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

HRID 1711620
ノート
印刷プレビュー

反応式

HRID 1711620 の反応式
[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]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

9

反応物 6

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

生成物 1

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

試薬・触媒・溶媒 2

HCID 1140Toluene溶媒HCID 8028Tetrahydrofuran溶媒

反応条件

温度
0 °C

実験手順

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+).

後処理

  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

出典と根拠

ORDレコード
ord-912d602169c84fb985f58b245f561e76
出典データセット
uspto-grants-2010_09
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US07790756B2

反応ノート

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