Hydrazine → {4-[(1H-benzoimidazol-2-ylmethyl)-(3-methyl-pyridin-2-ylmethyl)-amino]-butyl}-carbamic acid tert-butyl ester

HRID 250993Notes

Reaction equation

HRID 250993 reaction equation
C(OC([N:8]1[C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=2[N:10]=[C:9]1[CH2:17][N:18]([CH2:27][CH2:28][CH2:29][CH2:30][NH:31][C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH2:19][C:20]1[C:25]([CH3:26])=[CH:24][CH:23]=[CH:22][N:21]=1)=O)(C)(C)C.NN>CCO>[C:35]([O:34][C:32](=[O:33])[NH:31][CH2:30][CH2:29][CH2:28][CH2:27][N:18]([CH2:17][C:9]1[NH:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=2[N:8]=1)[CH2:19][C:20]1[C:25]([CH3:26])=[CH:24][CH:23]=[CH:22][N:21]=1)([CH3:38])([CH3:36])[CH3:37]

Participants

4

Reactant 2

HCID 9321HydrazineHCID 672726372-{[(4-tert-Butoxycarbonylamino-butyl)-(3-methyl-pyridin-2-ylmethyl)-amino]-methyl}-benzoimidazole-1-carboxylic acid tert-butyl ester

Product 1

HCID 67271501{4-[(1H-benzoimidazol-2-ylmethyl)-(3-methyl-pyridin-2-ylmethyl)-amino]-butyl}-carbamic acid tert-butyl esterYield 63.2%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a solution of 2-{[(4-tert-Butoxycarbonylamino-butyl)-(3-methyl-pyridin-2-ylmethyl)-amino]-methyl}-benzoimidazole-1-carboxylic acid tert-butyl ester (0.82 g, 1.57 mmol) in EtOH (8 mL) was added anhydrous hydrazine (0.50 mL, 15.9 mmol) and the resultant mixture was stirred at room temperature overnight. The mixture was filtered through filter paper and concentrated. Purification of the crude material by column chromatography on silica gel (20:1:1 CH2Cl2-MeOH—NH4OH) provided 0.42 g (62%) of {4-[(1H-benzoimidazol-2-ylmethyl)-(3-methyl-pyridin-2-ylmethyl)-amino]-butyl}-carbamic acid tert-butyl ester as white solid.

Workup

  1. filtrationThe mixture was filtered
  2. filtrationthrough filter paper
  3. concentrationconcentrated
  4. customPurification of the crude material by column chromatography on silica gel (20:1:1 CH2Cl2-MeOH—NH4OH)

Sources & evidence

ORD record
ord-0d24b7a8e1324b23a8b60cfd9e7fa095
Source dataset
uspto-grants-2011_01
Patent number
US07863293B2

Reaction notes

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