1-Hydroxybenzotriazole → 2-(2-ethylsulfanyl-phenyl)-3-methyl-6-trifluoromethyl-3H-benzimidazole-4-ylamine

HRID 923785Notes

Reaction equation

[CH3:1][NH:2][C:3]1[C:8]([NH2:9])=[CH:7][C:6]([C:10]([F:13])([F:12])[F:11])=[CH:5][C:4]=1[NH2:14].[CH2:15]([S:17][C:18]1[CH:26]=[CH:25][CH:24]=[CH:23][C:19]=1[C:20](O)=O)[CH3:16].Cl.C(N=C=NCCCN(C)C)C.ON1C2C=CC=CC=2N=N1>O.N1C=CC=CC=1>[CH2:15]([S:17][C:18]1[CH:26]=[CH:25][CH:24]=[CH:23][C:19]=1[C:20]1[N:2]([CH3:1])[C:3]2[C:8]([NH2:9])=[CH:7][C:6]([C:10]([F:11])([F:12])[F:13])=[CH:5][C:4]=2[N:14]=1)[CH3:16]

Participants

Conditions

Temperature: 110 °C

Procedure

To a mixture of N′-methyl-5-trifluoromethyl-benzene-1,2,3-triamine (1.3 g), 2-ethylsulfanylbenzoic acid (1.3 g), and pyridine (12 ml), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (1.4 g) and 1-hydroxybenzotriazole (86 mg) were added at room temperature. The mixture was stirred at room, temperature for 5 hours, then heated to 110° C., and stirred with heating for 8 hours. After the reaction mixture was allowed to cool to room temperature, the reaction mixture was diluted with water, and extracted with ethyl acetate. The combined organic layer was dried over sodium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 339 mg of 2-(2-ethylsulfanyl-phenyl)-3-methyl-6-trifluoromethyl-3H-benzimidazole-4-ylamine (hereinafter, Present Compound 336).

Workup

additionwere added at room temperature
stirringstirred
temperaturewith heating for 8 hours
temperatureto cool to room temperature
extractionextracted with ethyl acetate
dry with materialThe combined organic layer was dried over sodium sulfate
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-e4d2d0479b1d4db8a8752228c39e2267
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09278983B2

Reaction notes

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