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

HRID 1698562Notes

Reaction equation

Cl[C:2]1[N:6]([CH3:7])[C:5]2[C:8]([CH:14]([CH2:17][CH3:18])[CH2:15][CH3:16])=[CH:9][CH:10]=[C:11]([O:12][CH3:13])[C:4]=2[N:3]=1.[Cl:19][C:20]1[CH:26]=[C:25]([CH3:27])[C:23]([NH2:24])=[C:22]([O:28][CH3:29])[CH:21]=1.CN1CCCC1=O>O>[Cl:19][C:20]1[CH:26]=[C:25]([CH3:27])[C:23]([NH:24][C:2]2[N:6]([CH3:7])[C:5]3[C:8]([CH:14]([CH2:17][CH3:18])[CH2:15][CH3:16])=[CH:9][CH:10]=[C:11]([O:12][CH3:13])[C:4]=3[N:3]=2)=[C:22]([O:28][CH3:29])[CH:21]=1

Participants

Conditions

Temperature: 130 °C

Procedure

A mixture of 2-chloro-7-(1-ethylpropyl)-4-methoxy-1-methyl-1H-benzimidazole (120 mg, 0.450 mmol), 4-chloro-2-methoxy-6-methylaniline (231 mg, 1.35 mmol) and 1-methyl-2-pyrrolidone (0.5 mL) was stirred at 130° C. for 2 days under nitrogen atmosphere. The mixture was diluted with water, extracted with ethyl acetate and 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 (100 mg, 55%).

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-c137ad9cd4474bf4940b40f6dea8cc5f
Source dataset: uspto-grants-2012_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08163935B2

Reaction notes

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