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Sodium Hydroxide → (2-methyl-6-nitro-2H-indazol-3-yl)methanol

HRID 2213125
Notes
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Reaction equation

HRID 2213125 reaction equation
Br[CH2:2][C:3]1[N:4]([CH3:15])[N:5]=[C:6]2[C:11]=1[CH:10]=[CH:9][C:8]([N+:12]([O-:14])=[O:13])=[CH:7]2.[OH-:16].[Na+]>CC#N.O>[CH3:15][N:4]1[C:3]([CH2:2][OH:16])=[C:11]2[C:6]([CH:7]=[C:8]([N+:12]([O-:14])=[O:13])[CH:9]=[CH:10]2)=[N:5]1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 14798Sodium HydroxideHCID 219563503-(bromomethyl)-2-methyl-6-nitro-2H-indazole

Product 1

HCID 21956359(2-methyl-6-nitro-2H-indazol-3-yl)methanolYield 33%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6342AcetonitrileSolvent

Procedure

3-(Bromomethyl)-2-methyl-6-nitro-2H-indazole (4.20 g, ˜14.9 mmol) in CH3CN (500 ml) and water (200 ml) was treated with NaOH to give pH˜11. The solution was stirred at rt for 2 days then conc. in vacuo and repeatedly extracted with dichloromethane and chloroform. The combined organic extracts were evaporated, and the crude product was purified by silica gel column chromatography to give (2-methyl-6-nitro-2H-indazol-3-yl)methanol (1.03 g, 33% TY). MS (ES+, m/z) 208.

Workup

  1. customto give pH˜11
  2. extractionconc. in vacuo and repeatedly extracted with dichloromethane and chloroform
  3. customThe combined organic extracts were evaporated
  4. customthe crude product was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-5001aa95132c424286de13ff3eab426d
Source dataset
uspto-grants-2006_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07105530B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes