Hydrogen chloride-ethyl acetate → 4-[(1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-benzimidazol-2-yl)oxy]aniline

HRID 587470Notes

Reaction equation

HRID 587470 reaction equation
[CH3:1][Si:2]([CH3:32])([CH3:31])[CH2:3][CH2:4][O:5][CH2:6][N:7]1[C:11]2[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=2[N:9]=[C:8]1[O:16][C:17]1[CH:22]=[CH:21][C:20]([NH:23]C(=O)OC(C)(C)C)=[CH:19][CH:18]=1.Cl.CCOC(C)=O>CCOC(C)=O>[CH3:1][Si:2]([CH3:32])([CH3:31])[CH2:3][CH2:4][O:5][CH2:6][N:7]1[C:11]2[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=2[N:9]=[C:8]1[O:16][C:17]1[CH:18]=[CH:19][C:20]([NH2:23])=[CH:21][CH:22]=1

Participants

4

Reactant 2

HCID 21866389Hydrogen chloride-ethyl acetateHCID 58577462tert-butyl {4-[(1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-benzimidazol-2-yl)oxy]phenyl}carbamate

Product 1

HCID 585776534-[(1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-benzimidazol-2-yl)oxy]anilineYield 49.4%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

A mixture of tert-butyl {4-[(1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-benzimidazol-2-yl)oxy]phenyl}carbamate (14 g) and 4N HCl/AcOEt (30 mL) in EtOAc (30 mL) was stirred at room temperature overnight. The mixture was neutralized with 1N NaOHaq., and extracted with AcOEt. The organic layer was dried over MgSO4, and concentrated in vacuo. The residue was purified by column chromatography (silica gel, eluted with 0%-100% EtOAc in hexane) to give 4-[(1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-benzimidazol-2-yl)oxy]aniline (5.4 g) as an orange solid.

Workup

  1. extraction, and extracted with AcOEt
  2. dry with materialThe organic layer was dried over MgSO4
  3. concentrationconcentrated in vacuo
  4. customThe residue was purified by column chromatography (silica gel, eluted with 0%-100% EtOAc in hexane)

Sources & evidence

ORD record
ord-e402262648c14003aaec73b23de26922
Source dataset
uspto-grants-2016_01
Patent number
US09226921B2

Reaction notes

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