Triethylamine → Ethyl 2-((2-amino-5-bromopyridin-3-yl)methylamino)acetate

HRID 1362079Notes

Reaction equation

HRID 1362079 reaction equation
Br.[Br:2][C:3]1[CH:4]=[C:5]([CH2:10]Br)[C:6]([NH2:9])=[N:7][CH:8]=1.Cl.[CH2:13]([O:15][C:16](=[O:19])[CH2:17][NH2:18])[CH3:14].C(N(CC)CC)C>CN(C=O)C.O>[CH2:13]([O:15][C:16](=[O:19])[CH2:17][NH:18][CH2:10][C:5]1[C:6]([NH2:9])=[N:7][CH:8]=[C:3]([Br:2])[CH:4]=1)[CH3:14]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 2723640Glycine ethyl ester, hydrochlorideHCID 534200525-Bromo-3-(bromomethyl)pyridin-2-amine hydrobromide

Product 1

HCID 59456921Ethyl 2-((2-amino-5-bromopyridin-3-yl)methylamino)acetateYield 57%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A solution of 5-bromo-3-bromomethyl-pyridin-2-ylamine hydrobromide (6.00 g, 17.3 mmol) and glycine ethyl ester hydrochloride (2.41 g, 17.3 mmol) in DMF (200 mL) was treated with triethylamine (7.8 mL, 56 mmol). After stirring at room temperature for 3.5 h, the cloudy mixture was diluted with H2O (300 mL) and then extracted with EtOAc (2×300 mL). The combined organic layers were washed with H2O (3×100 mL) and brine (100 mL), dried over Na2SO4, filtered and the solvent was removed in vacuo. Purification by flash column chromatography (silica gel, CH2Cl2/MeOH, 98:2) gave the title compound (2.83 g, 57%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.04 (d, J=2.3 Hz, 1H), 7.36 (d, J=2.3 Hz, 1H), 5.56 (s, 2H), 4.22 (q, J=7.2 Hz, 2H), 3.71 (s, 2H), 3.38 (s, 2H), 1.73 (s, 1H), 1.30 (t, J=7.2 Hz, 3H); MS (ESI) m/e 288 (M+H)+.

Workup

  1. extractionextracted with EtOAc (2×300 mL)
  2. washThe combined organic layers were washed with H2O (3×100 mL) and brine (100 mL)
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. customthe solvent was removed in vacuo
  6. customPurification by flash column chromatography (silica gel, CH2Cl2/MeOH, 98:2)

Sources & evidence

ORD record
ord-dd88627f81af4e578ccc2d46839bdf07
Source dataset
uspto-grants-2011_02
Patent number
US07879872B2

Reaction notes

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