Sodium Chlorite → 1-Benzyl-6-chloro-2-isopropyl-1H-pyrrolo[3,2-c]pyridine-3-carboxylic acid

HRID 43271Notes

Reaction equation

HRID 43271 reaction equation
[CH2:1]([N:8]1[C:16]2[CH:15]=[C:14]([Cl:17])[N:13]=[CH:12][C:11]=2[C:10]([CH:18]=[O:19])=[C:9]1[CH:20]([CH3:22])[CH3:21])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[O-:23]Cl=O.[Na+]>CC(O)(C)C.CC(=CC)C.O>[CH2:1]([N:8]1[C:16]2[CH:15]=[C:14]([Cl:17])[N:13]=[CH:12][C:11]=2[C:10]([C:18]([OH:23])=[O:19])=[C:9]1[CH:20]([CH3:22])[CH3:21])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 2

HCID 23668197Sodium ChloriteHCID 580250621-Benzyl-6-chloro-2-isopropyl-1H-pyrrolo[3,2-c]pyridine-3-carbaldehyde2×

Product 1

HCID 446086101-Benzyl-6-chloro-2-isopropyl-1H-pyrrolo[3,2-c]pyridine-3-carboxylic acid

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6386tert-ButanolSolventHCID 105532-Methyl-2-buteneSolvent

Procedure

To a solution of 1-benzyl-6-chloro-2-isopropyl-1H-pyrrolo[3,2-c]pyridine-3-carbaldehyde (Compound 14, 146 mg, 0.47 mmol) in t-BuOH (15 ml) and 2-methyl-2-butene (10 ml) was added a solution of NaH2PO4 (1.41 g, 11.8 mmol) and NaClO2 (80%, 1.05 g, 9.3 mmol) in H2O (10 ml). The mixture was stirred at room temperature for 16 h and was extracted with EtOAc (×2). 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→100% EtOAc-hexanes, then 0→30% MeOH—CH2Cl2) to yield the title compound as a yellow solid.

Workup

  1. extractionwas extracted with EtOAc (×2)
  2. washThe combined organic layer was washed with brine
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by chromatography on silica gel (0→100% EtOAc-hexanes

Sources & evidence

ORD record
ord-3be5a8fbc1954756afae45eb02746e2a
Source dataset
uspto-grants-2013_09
Patent number
US08536339B2

Reaction notes

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