Sodium Chlorite → 6-(Ethoxycarbonyl)-2-isopropyl-1-(pyridin-2-ylmethyl)-1H-indole-3-carboxylic Acid
Reaction equation
[CH2:1]([O:3][C:4]([C:6]1[CH:14]=[C:13]2[C:9]([C:10]([CH:25]=[O:26])=[C:11]([CH:22]([CH3:24])[CH3:23])[N:12]2[CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][N:17]=2)=[CH:8][CH:7]=1)=[O:5])[CH3:2].[O-:27]Cl=O.[Na+]>CC(O)(C)C.CC(=CC)C.O>[CH2:1]([O:3][C:4]([C:6]1[CH:14]=[C:13]2[C:9]([C:10]([C:25]([OH:27])=[O:26])=[C:11]([CH:22]([CH3:23])[CH3:24])[N:12]2[CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][N:17]=2)=[CH:8][CH:7]=1)=[O:5])[CH3:2]Participants
6
Reactant 2
Product 1
Reagents, catalysts & solvents 3
Procedure
Following General Procedure D, ethyl3-formyl-2-isopropyl-1-(pyridin-2-ylmethyl)-1H-indole-6-carboxylate (Compound 36, 287 mg, 0.82 mmol) in t-BuOH (6 ml), 2-methyl-2-butene (2.29 ml) was added a solution of NaH2PO4 (1.97 g, 16.4mmol) and NaClO2 (80%, 1.48 g, 16.4 mmol) in H2O (6 ml). The mixture was stirred at room temperature for 12 h. The reaction mixture was extracted with EtOAc (×3) and the combined organic layer was washed with brine, dried over Na2SO4, and concentrated in vacuo. The residue was purified by chromatography on silica gel (0→50% EtOAc-hexanes) to yield the title compound as a light yellow solid.
Workup
- extractionThe reaction mixture was extracted with EtOAc (×3)
- washthe combined organic layer was washed with brine
- dry with materialdried over Na2SO4
- concentrationconcentrated in vacuo
- customThe residue was purified by chromatography on silica gel (0→50% EtOAc-hexanes)
Sources & evidence
- ORD record
- ord-e260a3a3d007425aa909bffd6ed3e178
- Source dataset
- uspto-grants-2013_09
- Patent number
- US08524917B2
Reaction notes
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