Ethyl orthopropionate → 1-(7-bromo-2-ethyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)-2-methylpropan-2-ol

HRID 598028Notes

Reaction equation

HRID 598028 reaction equation
[C:1](OCC)(OCC)(OCC)[CH2:2][CH3:3].[NH2:13][C:14]1[CH:15]=[N:16][C:17]2[C:22]([C:23]=1[NH:24][CH2:25][C:26]([CH3:29])([OH:28])[CH3:27])=[N:21][CH:20]=[C:19]([Br:30])[CH:18]=2>C1(C)C=CC=CC=1.Cl.N1C=CC=CC=1>[Br:30][C:19]1[CH:20]=[N:21][C:22]2[C:23]3[N:24]([CH2:25][C:26]([CH3:27])([OH:28])[CH3:29])[C:1]([CH2:2][CH3:3])=[N:13][C:14]=3[CH:15]=[N:16][C:17]=2[CH:18]=1

Participants

5

Reactant 2

HCID 66995Ethyl orthopropionateHCID 670523831-[(3-Amino-7-bromo[1,5]naphthyridin-4-yl)amino]-2-methylpropan-2-ol

Product 1

HCID 670524201-(7-bromo-2-ethyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)-2-methylpropan-2-olYield 75%

Reagents, catalysts & solvents 2

HCID 10176127Pyridinium chlorideCatalystHCID 1140TolueneSolvent

Procedure

Pyridine hydrochloride (0.095 g, 0.82 mmol) and triethyl orthopropionate (6.36 g, 36.1 mmol) were sequentially added to a solution of 1-[(3-amino-7-bromo[1,5]naphthyridin-4-yl)amino]-2-methylpropan-2-ol (10.2 g, 32.8 mmol) in toluene (200 mL), and the resulting mixture was heated at reflux for three hours. Most of the solvent was removed under reduced pressure, and a solid was present. The solid was isolated by filtration and dried to provide 8.59 g of 1-(7-bromo-2-ethyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)-2-methylpropan-2-ol as a light yellow solid. A small portion of the solid was recrystallized from acetonitrile to provide an off-white solid, mp 207-208° C.

Workup

  1. temperaturethe resulting mixture was heated
  2. temperatureat reflux for three hours
  3. customMost of the solvent was removed under reduced pressure
  4. customThe solid was isolated by filtration
  5. customdried

Sources & evidence

ORD record
ord-fc0d6256ac6c45888fb4663d028aceb8
Source dataset
uspto-grants-2011_03
Patent number
US07897609B2

Reaction notes

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