Potassium Iodide → HCID 13587988, compound

HRID 1493901Notes

Reaction equation

HRID 1493901 reaction equation
[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][CH:11]1[CH2:16][CH2:15][N:14]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[CH2:13][CH2:12]1.Cl.Cl[CH2:24][C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][N:26]=1.C(=O)([O-])[O-].[Na+].[Na+].[I-].[K+]>CN(C)C=O>[N:26]1[CH:27]=[CH:28][CH:29]=[CH:30][C:25]=1[CH2:24][N:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][CH:11]1[CH2:16][CH2:15][N:14]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[CH2:13][CH2:12]1

Participants

6

Reactant 4

HCID 4875Potassium IodideHCID 10340Sodium CarbonateHCID 23392Picolyl chloride hydrochlorideHCID 30184551-Piperidinecarboxylic acid, 4-(1H-benzimidazol-2-ylamino)-, ethyl ester

Product 1

HCID 13587988HCID 13587988, compoundYield 40%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
70 °C

Procedure

A mixture of 57.5 parts of ethyl 4-(1H-benzimidazol-2-ylamino)-1-piperidinecarboxylate, 33 parts of 2-(chloromethyl)pyridine hydrochloride, 43 parts of sodium carbonate, 0.1 parts of potassium iodide and 630 parts of N,N-dimethylformamide was stirred and heated overnight at 70° C. The reaction mixture was cooled and poured onto water. The product was extracted with 4-methyl-2-pentanone. The extract was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (96:4 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from 4-methyl-2-pentanone, yielding 30 parts (40%) of ethyl 4-[[1-[(2-pyridinyl)methyl]-1H-benzimidazol-2-yl]amino]-1-piperidinecarboxylate; mp. 161.5° C. (intermediate 60).

Workup

  1. temperatureThe reaction mixture was cooled
  2. additionpoured onto water
  3. extractionThe product was extracted with 4-methyl-2-pentanone
  4. customThe extract was dried
  5. filtrationfiltered
  6. customevaporated
  7. customThe residue was purified by column chromatography over silica gel using
  8. additiona mixture of trichloromethane and methanol (96:4 by volume) as eluent
  9. customThe pure fractions were collected
  10. customthe eluent was evaporated
  11. customThe residue was crystallized from 4-methyl-2-pentanone

Sources & evidence

ORD record
ord-3fee34d1ab5545a4876ca582196f0780
Source dataset
uspto-grants-1991_06
Patent number
US05025014

Reaction notes

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