Hydrochloric Acid → N-{2-[4-(5,6-Dichloro-2-ethyl-1H-benzimidazol-1-yl)phenyl]ethyl}hydroxylamine

HRID 2077711Notes

Reaction equation

HRID 2077711 reaction equation
C(OC([N:8]([O:30]C(OC(C)(C)C)=O)[CH2:9][CH2:10][C:11]1[CH:16]=[CH:15][C:14]([N:17]2[C:21]3[CH:22]=[C:23]([Cl:27])[C:24]([Cl:26])=[CH:25][C:20]=3[N:19]=[C:18]2[CH2:28][CH3:29])=[CH:13][CH:12]=1)=O)(C)(C)C.Cl.O.C(=O)(O)[O-].[Na+]>C(OCC)(=O)C>[Cl:26][C:24]1[C:23]([Cl:27])=[CH:22][C:21]2[N:17]([C:14]3[CH:13]=[CH:12][C:11]([CH2:10][CH2:9][NH:8][OH:30])=[CH:16][CH:15]=3)[C:18]([CH2:28][CH3:29])=[N:19][C:20]=2[CH:25]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 516892Sodium BicarbonateHCID 21876184HCID 21876184, compound

Product 1

HCID 21875813N-{2-[4-(5,6-Dichloro-2-ethyl-1H-benzimidazol-1-yl)phenyl]ethyl}hydroxylamine

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 1-[4-(2-{(tert-butoxycarbonyl)[(tert-butoxycarbonyl)oxy]amino}ethyl)phenyl]-5,6-dichloro-2-ethyl-1H-benzimidazole (step 1, 174 mg, 0.3 mmol) and 2N hydrochloric acid (3 mL) in ethyl acetate (20 mL) was stirred at room temperature for 1 day. The reaction mixture was poured into water (100 mL), neutralized with saturated aqueous sodium bicarbonate, and extracted with ethyl acetate (100 mL). The organic layer was washed with brine (50 mL), dried (Na2SO4), and concentrated to afford 162 mg (quant.) of the title compound as a yellow oil: 1H-NMR (CDCl3) δ 10.35 (2H, br.s), 7.89 (1H, s), 7.46-7.50 (2H, m), 7.29 (2H, d, J=6.8 Hz), 7.17 (1H, s), 3.37 (2H, t, J=6.9 Hz), 3.12 (2H, t, J=6.9 Hz), 2.80 (2H, q, J=6.9 Hz), 1.34 (3H, m).

Workup

  1. extractionextracted with ethyl acetate (100 mL)
  2. washThe organic layer was washed with brine (50 mL)
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-c18d101fc1e340deb73011586b4432ef
Source dataset
uspto-grants-2011_04
Patent number
US07928119B2

Reaction notes

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