N-methyl-2-pyrrolidone → N-(4-Chloro-2-methoxy-6-methylphenyl)-7-(1-ethylpropyl)-1,4-dimethyl-1H-benzimidazol-2-amine

HRID 1698565Notes

Reaction equation

Cl[C:2]1[N:6]([CH3:7])[C:5]2[C:8]([CH:13]([CH2:16][CH3:17])[CH2:14][CH3:15])=[CH:9][CH:10]=[C:11]([CH3:12])[C:4]=2[N:3]=1.[Cl:18][C:19]1[CH:25]=[C:24]([CH3:26])[C:22]([NH2:23])=[C:21]([O:27][CH3:28])[CH:20]=1.CN1CCCC1=O>O>[Cl:18][C:19]1[CH:25]=[C:24]([CH3:26])[C:22]([NH:23][C:2]2[N:6]([CH3:7])[C:5]3[C:8]([CH:13]([CH2:16][CH3:17])[CH2:14][CH3:15])=[CH:9][CH:10]=[C:11]([CH3:12])[C:4]=3[N:3]=2)=[C:21]([O:27][CH3:28])[CH:20]=1

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 2-chloro-7-(1-ethylpropyl)-1,4-dimethyl-1H-benzimidazole (100 mg, 0.399 mmol), 4-chloro-2-methoxy-6-methylaniline (205 mg, 1.20 mmol) and 1-methyl-2-pyrrolidone (0.2 mL) was stirred at 120° C. for 2 days under nitrogen atmosphere. The mixture was diluted with water and extracted with ethyl acetate, washed with brine. The organic layer was dried over magnesium sulfate, and concentrated in vacuo. The residue was purified by column chromatography on silica gel (n-hexane:ethyl acetate=10:1-1:1) and crystallized from iso-propanol to afford the title compound as colorless crystals (53 mg, 34%).

Workup

extractionextracted with ethyl acetate
washwashed with brine
dry with materialThe organic layer was dried over magnesium sulfate
concentrationconcentrated in vacuo
customThe residue was purified by column chromatography on silica gel (n-hexane:ethyl acetate=10:1-1:1)
customcrystallized from iso-propanol

Sources & evidence

ORD record: ord-240750d60b23439c8a1565af64a9d86c
Source dataset: uspto-grants-2012_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08163935B2

Reaction notes

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