1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 2-(2-propylsulfanylphenyl)-3-methyl-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine

HRID 533597Notes

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][N:4]=1.[CH2:14]([S:17][C:18]1[CH:26]=[CH:25][CH:24]=[CH:23][C:19]=1[C:20](O)=O)[CH2:15][CH3:16].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>O.N1C=CC=CC=1>[CH3:1][N:2]1[C:3]2=[N:4][CH:5]=[C:6]([C:10]([F:13])([F:11])[F:12])[CH:7]=[C:8]2[N:9]=[C:20]1[C:19]1[CH:23]=[CH:24][CH:25]=[CH:26][C:18]=1[S:17][CH2:14][CH2:15][CH3:16]

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of N2-methyl-5-trifluoromethylpyridin-2,3-diamine (0.96 g), 2-propylsulfanylbenzoic acid (1.08 g), WSC (0.78 g), and pyridine (10 ml) was stirred with heating at 120° C. for 1.5 hours. To the reaction mixture, HOBt (0.74 g) was added, and stirred with heating for 1.5 hours. WSC (0.38 g) was added thereto, and stirred with heating for further 2 hours. Into the reaction mixture cooled to room temperature, water was poured, and extracted with ethyl acetate. The organic layer was dried over magnesium sulfate, and concentrated under reduced pressure. The resulting residue was subjected to silica gel column chromatography to give 0.23 g of 3-methyl-2-(2-propylsulfanylphenyl)-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine (hereinafter referred to as Present Compound 7).

Workup

stirringstirred
temperaturewith heating for 1.5 hours
stirringstirred
temperaturewith heating for further 2 hours
temperatureInto the reaction mixture cooled to room temperature
extractionextracted with ethyl acetate
dry with materialThe organic layer was dried over magnesium sulfate
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-d77ea3ba87a04742a259e8514ea926bc
Source dataset: uspto-grants-2014_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08853238B2

Reaction notes

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