Water → 2-Acetamido-5-bromopyridine

HRID 1255803Notes

Reaction equation

HRID 1255803 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([Br:8])=[CH:4][N:3]=1.N1C=CC=CC=1.[C:15](OC(=O)C)(=[O:17])[CH3:16].O>C1COCC1>[Br:8][C:5]1[CH:6]=[CH:7][C:2]([NH:1][C:15](=[O:17])[CH3:16])=[N:3][CH:4]=1

Participants

6

Reactant 4

HCID 962WaterHCID 1049PyridineHCID 7918Acetic AnhydrideHCID 706222-Amino-5-bromopyridine

Product 1

HCID 2930972-Acetamido-5-bromopyridineYield 93%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 2-amino-5-bromopyridine (0.50 g, 2.9 mmol) in THF (10 mL) was added pyridine (343 mg, 4.3 mmol) and acetic anhydride (295 mg, 2.9 mmol) at room temperature and stirred overnight. To the mixture water (30 mL) was added, extracted with ethyl acetate (3×30 mL). The combined organic layers were washed with saturated aqueous NaHCO3 and brine, dried over Na2SO4, concentrated to give the title compound (0.58 g, 92%) as a white solid LCMS: 215 [M+2]+; 1HNMR (400 MHz, DMSO-d6) δ 2.09 (s, 3H), 7.97 (dd, J=8.8, 2.4 Hz, 1H), 8.06 (d, J=8.8 Hz, 1H), 8.41 (d, J=1.2 Hz, 1H), 10.64 (s, 1H).

Workup

  1. extractionextracted with ethyl acetate (3×30 mL)
  2. washThe combined organic layers were washed with saturated aqueous NaHCO3 and brine
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-e1c11ffbead44f41a877aea71e46f943
Source dataset
uspto-grants-2013_06
Patent number
US08461157B2

Reaction notes

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