Ammonia → N-[1-(2-aminopropyl)-4-piperidinyl]-1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-amine

HRID 620492Notes

Reaction equation

HRID 620492 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][N:9]2[C:13]3[CH:14]=[CH:15][CH:16]=[CH:17][C:12]=3[N:11]=[C:10]2[NH:18][CH:19]2[CH2:24][CH2:23][N:22]([CH2:25][C:26](=O)[CH3:27])[CH2:21][CH2:20]2)=[CH:4][CH:3]=1.[NH3:29].[H][H]>[Ni].CO>[NH2:29][CH:26]([CH3:27])[CH2:25][N:22]1[CH2:23][CH2:24][CH:19]([NH:18][C:10]2[N:9]([CH2:8][C:5]3[CH:6]=[CH:7][C:2]([F:1])=[CH:3][CH:4]=3)[C:13]3[CH:14]=[CH:15][CH:16]=[CH:17][C:12]=3[N:11]=2)[CH2:20][CH2:21]1

Participants

6

Reactant 3

HCID 222AmmoniaHCID 135880761-[4-[[1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-yl]amino]-1-piperidinyl]-2-propanoneHCID 178418361HCID 178418361, compound

Product 1

HCID 13588078N-[1-(2-aminopropyl)-4-piperidinyl]-1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-amineYield 34%

Reagents, catalysts & solvents 2

HCID 935NickelCatalystHCID 887MethanolSolvent

Procedure

A mixture of 4 parts of 1-[4-[[1-[(4-fluorophenyl)-methyl]-1H-benzimidazol-2-yl]amino]-1-piperidinyl]-2-propanone, oxime and 120 parts of methanol, saturated with ammonia, was hydrogenated at normal pressure and at room temperature with 2 parts of Raney-nickel catalyst. After the calculated amount of hydrogen was taken up, the catalyst was filtered off and the filtrate was evaporated. The residue was crystallized from acetonitrile, yielding 1.3 parts (34%) of N-[1-(2-aminopropyl)-4-piperidinyl]-1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-amine, mp. 178.3° C. (intermediate 132).

Workup

  1. filtrationthe catalyst was filtered off
  2. customthe filtrate was evaporated
  3. customThe residue was crystallized from acetonitrile

Sources & evidence

ORD record
ord-23bdb34d0b024b9ea303d25871e9e072
Source dataset
uspto-grants-1989_04
Patent number
US04820822

Reaction notes

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