Sodium Iodide → 1'-[(6-oxo-1,6-dihydropyridin-3-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one

HRID 2385563Notes

Reaction equation

HRID 2385563 reaction equation
C[O:2][C:3]1[N:8]=[CH:7][C:6]([CH2:9][N:10]2[C:18]3[C:13](=[CH:14][CH:15]=[CH:16][CH:17]=3)[C:12]3([C:30]4[C:21](=[CH:22][C:23]5[O:28][CH2:27][CH2:26][O:25][C:24]=5[CH:29]=4)[O:20][CH2:19]3)[C:11]2=[O:31])=[CH:5][CH:4]=1.[I-].[Na+].Cl[Si](C)(C)C.S(=O)(O)[O-].[Na+]>O.C(#N)C.C(OCC)(=O)C>[O:2]=[C:3]1[NH:8][CH:7]=[C:6]([CH2:9][N:10]2[C:18]3[C:13](=[CH:14][CH:15]=[CH:16][CH:17]=3)[C:12]3([C:30]4[C:21](=[CH:22][C:23]5[O:28][CH2:27][CH2:26][O:25][C:24]=5[CH:29]=4)[O:20][CH2:19]3)[C:11]2=[O:31])[CH:5]=[CH:4]1

Participants

9

Reactant 4

HCID 5238Sodium Iodide3×HCID 6397Chlorotrimethylsilane3×HCID 23665763Sodium BisulfiteHCID 593525591'-[(6-methoxypyridin-3-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one

Product 1

HCID 593524591'-[(6-oxo-1,6-dihydropyridin-3-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-oneYield 64.3%

Reagents, catalysts & solvents 4

HCID 962WaterCatalystHCID 962WaterSolventHCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred mixture of 1′-[(6-methoxypyridin-3-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one (0.24 g, 0.58 mmol), sodium iodide (0.29 g, 1.9 mmol), and water (2 drops) in acetonitrile (5 mL) was added chlorotrimethylsilane (0.23 mL, 1.8 mmol). The reaction mixture was stirred at ambient temperature for 16 h. Further, sodium iodide (0.14 g, 0.95 mmol) and chlorotrimethylsilane (0.12 mL, 0.95 mmol) were added and the reaction mixture was stirred at ambient temperature for 24 h. Further, sodium iodide (0.29 g, 1.9 mmol) and chlorotrimethylsilane (0.23 mL, 1.8 mmol) were added and the reaction mixture was stirred at ambient temperature for 5 days. A solution of sodium bisulfite (0.51 g, 4.9 mmol) in water (30 mL) and ethyl acetate (150 mL) were added. The layers were separated and the organic layer was washed with brine (2×50 mL), dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was triturated with diethyl ether and the crude product was purified by preparative thin layer chromatography and eluted with 30% acetone in dichloromethane to afford 1′-[(6-oxo-1,6-dihydropyridin-3-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one (0.15 g, 63%) as a colorless solid: mp 249-250° C.; 1H NMR (300 MHz, CDCl3) δ7.61-7.46 (m, 2H), 7.31-7.21 (m, 1H), 7.20-7.14 (m, 1H), 7.09-7.02 (m, 1H), 6.86-6.81 (m, 1H), 6.66-6.59 (m, 1H), 6.50 (s, 1H), 6.15 (s, 1H), 4.92-4.60 (m, 4H), 4.24-4.06 (m, 4H); 13C NMR (75 MHz, CDCl3) δ 177.7, 164.4, 155.2, 144.7, 142.2, 141.4, 138.3, 133.5, 132.2, 129.0, 124.2, 123.8, 120.9, 120.7, 115.8, 111.4, 108.7, 99.5, 80.0, 64.5, 63.9, 58.0, 40.6; MS (ES+) m/z 403.0 (M+1).

Workup

  1. stirringthe reaction mixture was stirred at ambient temperature for 24 h
  2. stirringthe reaction mixture was stirred at ambient temperature for 5 days
  3. customThe layers were separated
  4. washthe organic layer was washed with brine (2×50 mL)
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe residue was triturated with diethyl ether
  9. customthe crude product was purified by preparative thin layer chromatography
  10. washeluted with 30% acetone in dichloromethane

Sources & evidence

ORD record
ord-2369b93e23f749b9b02d33b84eb2a2d7
Source dataset
uspto-grants-2012_09
Patent number
US08263606B2

Reaction notes

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