3-[4-(benzyloxy)phenyl]-1-ethyl-6-methoxy-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one → 1-ethyl-3-(4-hydroxyphenyl)-6-methoxy-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

HRID 587542Notes

Reaction equation

HRID 587542 reaction equation
C([O:8][C:9]1[CH:14]=[CH:13][C:12]([N:15]2[C:19]3=[N:20][CH:21]=[C:22]([O:24][CH3:25])[CH:23]=[C:18]3[N:17]([CH2:26][CH3:27])[C:16]2=[O:28])=[CH:11][CH:10]=1)C1C=CC=CC=1>[Pd].CO>[CH2:26]([N:17]1[C:18]2[C:19](=[N:20][CH:21]=[C:22]([O:24][CH3:25])[CH:23]=2)[N:15]([C:12]2[CH:13]=[CH:14][C:9]([OH:8])=[CH:10][CH:11]=2)[C:16]1=[O:28])[CH3:27]

Participants

4

Reactant 1

HCID 585777083-[4-(benzyloxy)phenyl]-1-ethyl-6-methoxy-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

Product 1

HCID 585773681-ethyl-3-(4-hydroxyphenyl)-6-methoxy-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-oneYield 82.2%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

A mixture of 3-[4-(benzyloxy)phenyl]-1-ethyl-6-methoxy-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (120 mg) and 10% palladium on carbon (40 mg) in MeOH (10 mL) was hydrogenated under balloon pressure at room temperature for 2 h. The catalyst was removed by filtration and the filtrate was concentrated in vacuo to give 1-ethyl-3-(4-hydroxyphenyl)-6-methoxy-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (75 mg) as white crystals.

Workup

  1. customThe catalyst was removed by filtration
  2. concentrationthe filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-58b4ceac33d84bd78a37dbae1e0291dd
Source dataset
uspto-grants-2016_01
Patent number
US09226921B2

Reaction notes

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