HCID 19911497, compound → HCID 19911566, compound

HRID 1533960Notes

Reaction equation

HRID 1533960 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-598d1c7a0d4d46c498b4f2460f41858e
Source dataset
uspto-grants-1992_02
Patent number
US05086056

Reaction notes

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