Ammonium Chloride → HCID 86667924, compound

HRID 1486643Notes

Reaction equation

HRID 1486643 reaction equation
[Br:1][C:2]1[N:7]=[C:6]([CH:8]=[O:9])[C:5]([Cl:10])=[CH:4][CH:3]=1.[CH3:11][Mg]Br.[Cl-].[NH4+]>C1COCC1>[Br:1][C:2]1[N:7]=[C:6]([CH:8]([OH:9])[CH3:11])[C:5]([Cl:10])=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 25517Ammonium ChlorideHCID 722123126-Bromo-3-chloro-2-pyridinecarboxaldehydeHCID 178418573HCID 178418573, compound

Product 1

HCID 86667924HCID 86667924, compoundYield 78.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 6-bromo-3-chloropicolinaldehyde (10.0 g, 45.45 mmol) in 200 mL THF stirring at −78° C. under N2 was slowly added methylmagnesium bromide (3.0 M in diethyl ether, 16.63 mL, 50 mmol). The reaction was stirred at this temperature for 3 hours, and then saturated ammonium chloride was added. The mixture was extracted with EtOAc. The combined organic layers were dried (MgSO4), filtered, and concentrated in vacuo. The residue was purified by silica gel chromatography (0-10% EtOAc/hexanes over 20 minutes) to provide 1-(6-bromo-3-chloropyridin-2-yl)ethanol (8.4 g, 78%).

Workup

  1. customat −78° C.
  2. extractionThe mixture was extracted with EtOAc
  3. dry with materialThe combined organic layers were dried (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by silica gel chromatography (0-10% EtOAc/hexanes over 20 minutes)

Sources & evidence

ORD record
ord-b2035cbeb29d451aaef3b86779997d84
Source dataset
uspto-grants-2016_08
Patent number
US09428475B2

Reaction notes

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