Methyl iodide → 1H-Indazole, 1-methyl-6-nitro-

HRID 2109604

Reaction equation

HRID 2109604 reaction equation
[N+:1]([C:4]1[CH:12]=[C:11]2[C:7]([CH:8]=[N:9][NH:10]2)=[CH:6][CH:5]=1)([O-:3])=[O:2].[H-].[Na+].[CH3:15]I>C1COCC1>[CH3:15][N:10]1[C:11]2[C:7](=[CH:6][CH:5]=[C:4]([N+:1]([O-:3])=[O:2])[CH:12]=2)[CH:8]=[N:9]1

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 242396-NitroindazoleHCID 24758Sodium hydride

Product 1

HCID 812901H-Indazole, 1-methyl-6-nitro-

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 6-nitroindazole (8 g) in THF (200 ml) was added NaH (2.5 g) at 0° C. The reaction was stirred for 30 min and MeI (3.7 ml) was added and stirred at RT overnight. The reaction was quenched with water and extracted with EtOAc twice, then was further purified by column chromatography to give 1-methyl-6-nitro-1H-indazole which was hydrogenated with an H2 atmosphere in the presence of Pd/C (400 mg) to give 1-methyl-6-amino-1H-indazole.

Workup

  1. stirringstirred at RT overnight
  2. customThe reaction was quenched with water
  3. extractionextracted with EtOAc twice
  4. customwas further purified by column chromatography

Sources & evidence

ORD record
ord-835a83ce04864bafa11613670aadab6b
Source dataset
uspto-grants-2009_04
Patent number
US07514564B2

Linked notes

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