Sodium hydride → (+/-)-1,1-dimethylethyl 4-[[1-[2-hydroxy-2-(6-methyl-2-pyridinyl)ethyl]-1H-benzimidazol-2-yl]amino]-1-piperidinecarboxylate

HRID 349208Notes

Reaction equation

HRID 349208 reaction equation
[H-].[Na+].[NH:3]1[C:7]2[CH:8]=[CH:9][CH:10]=[CH:11][C:6]=2[N:5]=[C:4]1[NH:12][CH:13]1[CH2:18][CH2:17][N:16]([C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[CH2:15][CH2:14]1.[O:26]1[CH:28]([C:29]2[N:34]=[C:33]([CH3:35])[CH:32]=[CH:31][CH:30]=2)[CH2:27]1>CN(C)C=O>[OH:26][CH:28]([C:29]1[CH:30]=[CH:31][CH:32]=[C:33]([CH3:35])[N:34]=1)[CH2:27][N:3]1[C:7]2[CH:8]=[CH:9][CH:10]=[CH:11][C:6]=2[N:5]=[C:4]1[NH:12][CH:13]1[CH2:18][CH2:17][N:16]([C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[CH2:15][CH2:14]1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 219281642-Methyl-6-(oxiran-2-yl)pyridineHCID 22036999tert-Butyl 4-((1H-benzo[d]imidazol-2-yl)amino)piperidine-1-carboxylate

Product 1

HCID 22711809(+/-)-1,1-dimethylethyl 4-[[1-[2-hydroxy-2-(6-methyl-2-pyridinyl)ethyl]-1H-benzimidazol-2-yl]amino]-1-piperidinecarboxylateYield 38.8%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Conditions

Temperature
40 °C

Procedure

Reaction under N2 flow. NaH 60% (0.02 mol) was added to a mixture of 1,1-dimethyl-ethyl 4-(1H-benzimidazol-2-ylamino)-1-piperidinecarboxylate (0.02 mol) in N,N-di-methylformamide (100 ml). The mixture was stirred at 40° C. for 1 hour. 6-(Epoxyethyl)-2-picoline (0.02 mol) in a small amount of N,N-dimethylformamide was added. The mixture was stirred at 100° C. overnight. The solvent was evaporated. The residue was taken up in H2O and CH2Cl2. The organic layer was separated, dried, filtered and the solvent was evaporated. The residue was purified by column chromatography over silica gel (eluent: CH2Cl2/CH3OH 95/5 and 90/10). The pure fractions were collected and the solvent was evaporated, yielding 3.5 g of (±)-1,1-dimethylethyl 4-[[1-[2-hydroxy-2-(6-methyl-2-pyridinyl)ethyl]-1H-benzimidazol-2-yl]amino]-1-piperidinecarboxylate (interm. 16).

Workup

  1. customReaction under N2 flow
  2. stirringThe mixture was stirred at 100° C. overnight
  3. customThe solvent was evaporated
  4. customThe organic layer was separated
  5. customdried
  6. filtrationfiltered
  7. customthe solvent was evaporated
  8. customThe residue was purified by column chromatography over silica gel (eluent: CH2Cl2/CH3OH 95/5 and 90/10)
  9. customThe pure fractions were collected
  10. customthe solvent was evaporated

Sources & evidence

ORD record
ord-b294c0be88ae4a01b6cfb1dc7aba0a17
Source dataset
uspto-grants-2007_02
Patent number
US07179811B2

Reaction notes

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