Sodium periodate → 3-chloro-5-oxo-5H-benzo[4,5]cyclohepta[1,2-b]pyridine-7-carbaldehyde

HRID 1987129Notes

Reaction equation

HRID 1987129 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]2[C:12](=[O:13])[C:11]3[CH:14]=[C:15]([CH:18]([OH:21])CO)[CH:16]=[CH:17][C:10]=3[CH:9]=[CH:8][C:5]2=[N:6][CH:7]=1.I([O-])(=O)(=O)=O.[Na+]>O1CCCC1.O>[Cl:1][C:2]1[CH:3]=[C:4]2[C:12](=[O:13])[C:11]3[CH:14]=[C:15]([CH:18]=[O:21])[CH:16]=[CH:17][C:10]=3[CH:9]=[CH:8][C:5]2=[N:6][CH:7]=1

Participants

5

Reactant 2

HCID 23667635Sodium periodateHCID 577228643-chloro-7-(1,2-dihydroxyethyl)-5H-benzo[4,5]cyclohepta[1,2-b]pyridin-5-one

Product 1

HCID 577228923-chloro-5-oxo-5H-benzo[4,5]cyclohepta[1,2-b]pyridine-7-carbaldehyde

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 8028TetrahydrofuranSolvent

Procedure

3-chloro-7-(1,2-dihydroxyethyl)-5H-benzo[4,5]cyclohepta[1,2-b]pyridin-5-one (60 mg, 0.20 mmol) was dissolved in 1.8 mL of tetrahydrofuran and 0.9 mL water. Sodium periodate (51 mg, 0.24 mmol) was added and the reaction was stirred at room temperature for 1 hour. The reaction was then diluted with water and extracted with ethyl acetate three times. The combined organics were dried over magnesium sulfate, filtered, concentrated in vacuo, and purified via flash chromatography (silica, 10-100% ethyl acetate/hexanes) to afford the title compound. 1H NMR (600 MHz, CDCl3) δ 10.15 (s, 1H); 8.85 (d, 1H); 8.73 (d, 1H); 8.54 (d, 1H); 8.20 (dd, 1H); 7.75 (d, 1H); 7.47 (d, 1H); 7.31 (d, 1H).

Workup

  1. extractionextracted with ethyl acetate three times
  2. dry with materialThe combined organics were dried over magnesium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. custompurified via flash chromatography (silica, 10-100% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-1e803c08e00543cbad267aefbbbc3946
Source dataset
uspto-grants-2009_06
Patent number
US07550478B2

Reaction notes

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