Dimethylformamide → 4-[[3-(2-ethoxyethyl)-3H-imidazo[4,5-b]pyridin-2-yl]amino]-1-piperidineacetonitrile

HRID 2166136Notes

Reaction equation

HRID 2166136 reaction equation
Cl[CH2:2][C:3]#[N:4].[CH2:5]([O:7][CH2:8][CH2:9][N:10]1[C:14]2=[N:15][CH:16]=[CH:17][CH:18]=[C:13]2[N:12]=[C:11]1[NH:19][CH:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1)[CH3:6].C(=O)([O-])[O-].[Na+].[Na+].CN(C)C=O>O>[CH2:5]([O:7][CH2:8][CH2:9][N:10]1[C:14]2=[N:15][CH:16]=[CH:17][CH:18]=[C:13]2[N:12]=[C:11]1[NH:19][CH:20]1[CH2:21][CH2:22][N:23]([CH2:2][C:3]#[N:4])[CH2:24][CH2:25]1)[CH3:6]

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 7856ChloroacetonitrileHCID 10340Sodium CarbonateHCID 157188163-(2-ethoxyethyl)-N-(4-piperidinyl)-3H-imidazo[4,5-b]pyridin-2-amine

Product 1

HCID 157188944-[[3-(2-ethoxyethyl)-3H-imidazo[4,5-b]pyridin-2-yl]amino]-1-piperidineacetonitrileYield 21%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 9.4 parts of 2-chloroacetonitrile, 30 parts of 3-(2-ethoxyethyl)-N-(4-piperidinyl)-3H-imidazo[4,5-b]pyridin-2-amine, 11 parts of sodium carbonate and 658 parts of N,N-dimethylformamide was stirred over weekend at room temperature. The reaction mixture was poured into water and the product was extracted with dichloromethane. The extract was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (97:3 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was stirred in 2,2'-oxybispropane. The product was filtered off and dried in vacuo, yielding 7.2 parts (21.0%) of 4-[[3-(2-ethoxyethyl)-3H-imidazo[4,5-b]pyridin-2-yl]amino]-1-piperidineacetonitrile; mp. 141.4° C. (compound 92).

Workup

  1. extractionthe product was extracted with dichloromethane
  2. customThe extract was dried
  3. filtrationfiltered
  4. customevaporated
  5. customThe residue was purified by column chromatography over silica gel using
  6. additiona mixture of trichloromethane and methanol (97:3 by volume) as eluent
  7. customThe pure fractions were collected
  8. customthe eluent was evaporated
  9. stirringThe residue was stirred in 2,2'-oxybispropane
  10. filtrationThe product was filtered off
  11. customdried in vacuo

Sources & evidence

ORD record
ord-b0d27bac4dbe4fc3b33a913918999c97
Source dataset
uspto-grants-1990_07
Patent number
US04943580

Reaction notes

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