HCID 18680797, compound → HCID 18680884, compound

HRID 1699631Notes

Reaction equation

HRID 1699631 reaction equation
[CH3:1][C:2]1[N:6]([CH2:7][C:8]2[CH:13]=[CH:12][C:11]([N+:14]([O-])=O)=[CH:10][CH:9]=2)[C:5]2[CH:17]=[C:18]([C:21](=[O:30])[NH:22][CH2:23][C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][N:25]=3)[CH:19]=[CH:20][C:4]=2[N:3]=1.[CH3:31][C:32]1[N:36]([CH2:37][C:38]2[CH:43]=[CH:42][C:41]([N+:44]([O-])=O)=[CH:40][CH:39]=2)[C:35]2[CH:47]=[CH:48][C:49]([C:51](=[O:60])[NH:52][CH2:53][C:54]3[CH:59]=[CH:58][CH:57]=[CH:56][N:55]=3)=[CH:50][C:34]=2[N:33]=1>[Pd].CO>[NH2:14][C:11]1[CH:10]=[CH:9][C:8]([CH2:7][N:6]2[C:5]3[CH:17]=[C:18]([C:21](=[O:30])[NH:22][CH2:23][C:24]4[CH:29]=[CH:28][CH:27]=[CH:26][N:25]=4)[CH:19]=[CH:20][C:4]=3[N:3]=[C:2]2[CH3:1])=[CH:13][CH:12]=1.[NH2:44][C:41]1[CH:40]=[CH:39][C:38]([CH2:37][N:36]2[C:35]3[CH:47]=[CH:48][C:49]([C:51](=[O:60])[NH:52][CH2:53][C:54]4[CH:59]=[CH:58][CH:57]=[CH:56][N:55]=4)=[CH:50][C:34]=3[N:33]=[C:32]2[CH3:31])=[CH:43][CH:42]=1

Participants

6

Reactant 2

HCID 18680797HCID 18680797, compoundHCID 18680816HCID 18680816, compound

Product 2

HCID 18680884HCID 18680884, compoundHCID 18681104HCID 18681104, compound

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

Methanol (30 ml) and 5% palladium/carbon (0.20 g) are added to a mixture (2.32 g) of 2-methyl-1-(4-nitrobenzyl)-6-[(2-pyridylmethyl)carbamoyl]benzimidazole and 2-methyl-1-(4-nitrobenzyl)-5-[(2-pyridylmethyl)carbamoyl]benzimidazole, and the solution is stirred at room temperature under a nitrogen environment until the raw materials dissolved. Solid materials are separated through filtration. The filtrate is concentrated and a residue is obtained. The residue is purified through medium pressure silica gel column chromatography (eluate: ethyl acetate/methanol=85/15), and 1-(4-aminobenzyl)-2-methyl-6-[(2-pyridylmethyl)carbamoyl]benzimidazole and 1-(4-aminobenzyl)-2-methyl-5-[(2-pyridylmethyl)carbamoyl]benzimidazole are separated. These materials are crystallized in mixed solvents of chloroform and diethylether. The crystals are separated through filtration, dried and thus, 1-(4-aminobenzyl)-2-methyl-6-[(2-pyridylmethyl)carbamoyl]benzimidazole (0.354 g) (197) and 1-(4-aminobenzyl)-2-methyl-5-[(2-pyridylmethyl)carbamoyl]benzimidazole (0.330 g) (198) are obtained. 1H-NMR (CDCl3, δ): 3.00 (3H, s), 4.98 (2H, s), 5.88 (2H, s), 7.55 (2H, d, J=8.6 Hz), 7.69 (2H, d, J=8.6 Hz), 7.90 (1H, d, J=8.6 Hz), 7.96 (1H, dt, J=7.1 and 0.6 Hz), 8.12 (1H, J=8.0 Hz), 8.18 (1H, dd, J=8.5 and 1.4 Hz), 8.55 (1H, dt, J=8.0 and 1.7 Hz), 8.62 (1H, d,J=1.1 Hz), 8.77(1H, dd, J=5.9 and 1.1 Hz).

Workup

  1. dissolutiondissolved
  2. customSolid materials are separated through filtration
  3. concentrationThe filtrate is concentrated
  4. customa residue is obtained
  5. customThe residue is purified through medium pressure silica gel column chromatography (eluate: ethyl acetate/methanol=85/15), and 1-(4-aminobenzyl)-2-methyl-6-[(2-pyridylmethyl)carbamoyl]benzimidazole and 1-(4-aminobenzyl)-2-methyl-5-[(2-pyridylmethyl)carbamoyl]benzimidazole
  6. customare separated
  7. customThese materials are crystallized in mixed solvents of chloroform and diethylether
  8. customThe crystals are separated through filtration
  9. customdried

Sources & evidence

ORD record
ord-333b11ea43374cde9b1eb571c4808fcd
Source dataset
uspto-grants-2002_02
Patent number
US06348032B1

Reaction notes

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