Isoamyl Nitrite → 1'-[2-(trifluoromethyl)benzyl]-1H-spiro[furo[3,2-f]indazole-5,3'-indol]-2'(1'H)-one

HRID 1407945ノート

反応式

HRID 1407945 の反応式
F[C:2]1[C:7]([C:8]#[N:9])=[CH:6][C:5]2[C:10]3([CH2:31][O:32][C:4]=2[CH:3]=1)[C:18]1[C:13](=[CH:14][CH:15]=[CH:16][CH:17]=1)[N:12]([CH2:19][C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=1[C:26]([F:29])([F:28])[F:27])[C:11]3=[O:30].O.NN.[N:36](OCCC(C)C)=O.[PH2](O)=O.C(=O)(O)[O-].[Na+]>COCCOC>[F:27][C:26]([F:29])([F:28])[C:21]1[CH:22]=[CH:23][CH:24]=[CH:25][C:20]=1[CH2:19][N:12]1[C:13]2[C:18](=[CH:17][CH:16]=[CH:15][CH:14]=2)[C:10]2([C:5]3[CH:6]=[C:7]4[C:2](=[CH:3][C:4]=3[O:32][CH2:31]2)[NH:36][N:9]=[CH:8]4)[C:11]1=[O:30]

参加物

7

反応物 5

HCID 8053Isoamyl NitriteHCID 24654Hydrazine hydrate (1:1)HCID 516892Sodium BicarbonateHCID 4124402Phosphinic AcidHCID 593526726-Fluoro-2'-oxo-1'-[2-(trifluoromethyl)benzyl]-1',2'-dihydrospiro[1-benzofuran-3,3-indole]-5-carbonitrile

生成物 1

HCID 461958541'-[2-(trifluoromethyl)benzyl]-1H-spiro[furo[3,2-f]indazole-5,3'-indol]-2'(1'H)-one収率 10%

試薬・触媒・溶媒 1

HCID 80711,2-Dimethoxyethane溶媒

実験手順

To a stirred solution of 6-fluoro-2′-oxo-1′-[2-(trifluoromethyl)benzyl]-1′,2′-dihydrospiro[1-benzofuran-3,3′-indole]-5-carbonitrile (0.44 g, 1.0 mmol) in 1,2-dimethoxyethane (20 mL) was added hydrazine monohydrate (1.0 mL, 21 mmol). The reaction mixture was stirred at reflux for 19 h and concentrated in vacuo. The residue was dissolved in ethanol (20 mL) and isoamyl nitrite (1.50 mL, 10.7 mmol), and hypophosphorous acid (2.0 mL, 18 mmol) was added. The reaction mixture was allowed to stir at ambient temperature for 18 h, neutralized with saturated aqueous sodium bicarbonate and extracted with ethyl acetate (3×100 mL). The combined organic extracts was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo. The residue was subjected to column chromatography and eluted with ethyl acetate/hexanes (1/1) to afford 1′-[2-(trifluoromethyl)benzyl]-1H-spiro[furo[3,2-f]indazole-5,3′-indol]-2′(1′H)-one (0.04 g, 10%): mp 124-126° C. (ethyl acetate/hexanes); 1H NMR (300 MHz, DMSO-d6) δ 12.83 (s, 1H), 7.83-7.0 (m, 2H), 7.67-7.63 (m, 1H), 7.54-7.49 (m, 1H), 7.27-7.18 (m, 4H), 7.08-7.03 (m, 1H), 6.95-6.94 (m, 1H), 6.81-6.77 (m, 1H), 5.07-4.83 (m, 4H); MS (ES−) m/z 436.2 (M−1).

後処理

  1. temperatureat reflux for 19 h
  2. concentrationconcentrated in vacuo
  3. dissolutionThe residue was dissolved in ethanol (20 mL)
  4. stirringto stir at ambient temperature for 18 h
  5. extractionextracted with ethyl acetate (3×100 mL)
  6. dry with materialThe combined organic extracts was dried over anhydrous sodium sulfate
  7. filtrationfiltered
  8. concentrationThe filtrate was concentrated in vacuo
  9. washeluted with ethyl acetate/hexanes (1/1)

出典と根拠

ORDレコード
ord-860faccbcb4c46d2abffa8eabcff21c9
出典データセット
uspto-grants-2014_12
特許番号
US08916580B2

反応ノート

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