Cesium carbonate → 1,1-Dimethylethyl (3S)-3-({[7-(1-ethyl-1H-pyrazol-4-yl)-1,6-naphthyridin-5-yl]oxy}methyl)-3-fluoro-1-piperidinecarboxylate

HRID 473324ノート

反応式

HRID 473324 の反応式
Cl[C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[CH:7][CH:8]=[N:9]2)=[C:4]([O:12][CH2:13][C@:14]2([F:27])[CH2:19][CH2:18][CH2:17][N:16]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:15]2)[N:3]=1.[CH2:28]([N:30]1[CH:34]=[C:33](B2OC(C)(C)C(C)(C)O2)[CH:32]=[N:31]1)[CH3:29].C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.O.C(Cl)Cl.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[CH2:28]([N:30]1[CH:34]=[C:33]([C:2]2[CH:11]=[C:10]3[C:5]([CH:6]=[CH:7][CH:8]=[N:9]3)=[C:4]([O:12][CH2:13][C@:14]3([F:27])[CH2:19][CH2:18][CH2:17][N:16]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:15]3)[N:3]=2)[CH:32]=[N:31]1)[CH3:29]

参加物

8

反応物 3

HCID 10796Cesium carbonateHCID 113790451-Ethyl-1H-pyrazole-4-boronic acid, pinacol esterHCID 866768021,1-Dimethylethyl (3S)-3-{[(7-chloro-1,6-naphthyridin-5-yl)oxy]methyl}-3-fluoro-1-piperidinecarboxylate

生成物 1

HCID 682098821,1-Dimethylethyl (3S)-3-({[7-(1-ethyl-1H-pyrazol-4-yl)-1,6-naphthyridin-5-yl]oxy}methyl)-3-fluoro-1-piperidinecarboxylate収率 86.9%

試薬・触媒・溶媒 4

HCID 9811564Bis(dibenzylideneacetone)palladium触媒HCID 962Water溶媒HCID 6344Dichloromethane溶媒HCID 312751,4-Dioxane溶媒

実験手順

A mixture of 1,1-dimethylethyl (3S)-3-{[(7-chloro-1,6-naphthyridin-5-yl)oxy]methyl}-3-fluoro-1-piperidinecarboxylate (1.1 g, 2.78 mmol), 1-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (0.679 g, 3.06 mmol) and caesium carbonate (2.263 g, 6.95 mmol) in 1,4-dioxane (16 ml) and water (3 ml) was degassed with nitrogen before adding tetrakis(triphenylphosphine)palladium (0) (0.096 g, 0.083 mmol). This was heated under reflux for 18 h. The reaction was partitioned between ethyl acetate and aqueous ammonium chloride. The aqueous was re-extracted with ethyl acetate and the combined organics were washed with brine, passed through a hydrophobic frit and concentrated in vacuo to give crude product. This was dissolved in DCM and purified through silica (20 g) eluting with a gradient of ethyl acetate in DCM. The product eluted in neat ethyl acetate. Appropriate fractions were combined and concentrated in vacuo to yield the title compound as a pinkish cream foam (1.10 g).

後処理

  1. customwas degassed with nitrogen
  2. temperatureThis was heated
  3. temperatureunder reflux for 18 h
  4. customThe reaction was partitioned between ethyl acetate and aqueous ammonium chloride
  5. extractionThe aqueous was re-extracted with ethyl acetate
  6. washthe combined organics were washed with brine
  7. concentrationconcentrated in vacuo
  8. customto give crude product
  9. custompurified through silica (20 g)
  10. washeluting with a gradient of ethyl acetate in DCM
  11. washThe product eluted in neat ethyl acetate
  12. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-a99d654c132d4e459e3a7336f15b883c
出典データセット
uspto-grants-2014_01
特許番号
US08633319B2

反応ノート

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