N-methyl-2-pyrrolidone → 6-cyano-2-(2-ethylsulfanylphenyl)-3-methyl-3H-imidazo[4,5-b]pyridine

HRID 923751Notes

Reaction equation

Br[C:2]1[CH:3]=[C:4]2[N:10]=[C:9]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=3[S:17][CH2:18][CH3:19])[N:8]([CH3:20])[C:5]2=[N:6][CH:7]=1.[Cl-].[NH4+].[CH3:23][N:24]1CCCC1=O>[C-]#N.[Zn+2].[C-]#N.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:23]([C:2]1[CH:3]=[C:4]2[N:10]=[C:9]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=3[S:17][CH2:18][CH3:19])[N:8]([CH3:20])[C:5]2=[N:6][CH:7]=1)#[N:24]

Participants

Conditions

Temperature: 90 °C

Procedure

A mixture of zinc cyanide (0.47 g), tetrakis(triphenylphosphine)palladium (0.12 g), 6-bromo-2-(2-ethylsulfanylphenyl)-3-methyl-3H-imidazo[4,5-b]pyridine (0.70 g), and N-methylpyrrolidone (hereinafter referred to as NMP) (4 ml) was stirred at 90° C. for 2 hours. Into the reaction mixture cooled to room temperature, saturated aqueous ammonium chloride solution was poured, and extracted with ethyl acetate. The organic layer was dried over sodium sulfate, and concentrated under reduced pressure. The resulting residue was subjected to silica gel column chromatography to give 0.59 g of 6-cyano-2-(2-ethylsulfanylphenyl)-3-methyl-3H-imidazo[4,5-b]pyridine (hereinafter referred to as Present Compound 48).

Workup

temperatureInto the reaction mixture cooled to room temperature
extractionextracted with ethyl acetate
dry with materialThe organic layer was dried over sodium sulfate
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-47ee85d1190c44dba789a491b18ced18
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09278983B2

Reaction notes

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