HCID 19911497, compound → HCID 19911566, compound

HRID 1708919Notes

Reaction equation

HRID 1708919 reaction equation
[CH2:1]([O:3][CH2:4][CH2:5][N:6]1[C:14]2[C:9](=[N:10][CH:11]=[CH:12][CH:13]=2)[N:8]=[C:7]1[CH2:15][N:16]1[CH2:21][CH2:20][N:19](CC2C=CC=CC=2)[CH2:18][CH2:17]1)[CH3:2].[H][H]>[Pd].CO>[CH2:1]([O:3][CH2:4][CH2:5][N:6]1[C:14]2[C:9](=[N:10][CH:11]=[CH:12][CH:13]=2)[N:8]=[C:7]1[CH2:15][N:16]1[CH2:17][CH2:18][NH:19][CH2:20][CH2:21]1)[CH3:2]

Participants

5

Reactant 2

HCID 19911497HCID 19911497, compoundHCID 178418361HCID 178418361, compound

Product 1

HCID 19911566HCID 19911566, compoundYield 46.1%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

A mixture of 8.3 parts of 1-(2-ethoxyethyl)-2-[[4-(phenylmethyl)-1-piperazinyl]methyl]-1H-imidazo[4,5-b]pyridine and 200 parts of methanol was hydrogenated at normal pressure and at room temperature with 2 parts of palladium-on-charcoal catalyst 10%. After the calculated amount of hydrogen was taken up, the catalyst was filtered off and the filtrate was evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol, saturated with ammonia, (90:10 by volume) as eluent. The pure fractions were collected and the eluent was evaporated, yielding 3.2 parts (46.1%) of 1-(2-ethoxyethyl)-2-(1-piperazinylmethyl)-1H-imidazo[4,5-b]pyridine as a residue (compound 31).

Workup

  1. filtrationthe catalyst was filtered off
  2. customthe filtrate was evaporated
  3. customThe residue was purified by column chromatography over silica gel using
  4. additiona mixture of trichloromethane and methanol
  5. customThe pure fractions were collected
  6. customthe eluent was evaporated

Sources & evidence

ORD record
ord-fa07211f18f84c5bbc616124beaaa3c9
Source dataset
uspto-grants-1990_08
Patent number
US04946843

Reaction notes

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