Triethylamine → 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-(2-formyl-1-methyl-1H-imidazol-5-yl)thieno[3,2-b]pyridine-6-carbonitrile

HRID 1178677Notes

Reaction equation

HRID 1178677 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[C:5]([O:9][CH3:10])=[CH:4][C:3]=1[NH:11][C:12]1[C:17]([C:18]#[N:19])=[CH:16][N:15]=[C:14]2[CH:20]=[C:21](I)[S:22][C:13]=12.[CH3:24][N:25]1[C:29]([Sn](CCCC)(CCCC)CCCC)=[CH:28][N:27]=[C:26]1[CH:43]=[O:44].C(N(CC)CC)C.C(=O)(O)[O-].[Na+]>O1CCOCC1.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[C:5]([O:9][CH3:10])=[CH:4][C:3]=1[NH:11][C:12]1[C:17]([C:18]#[N:19])=[CH:16][N:15]=[C:14]2[CH:20]=[C:21]([C:29]3[N:25]([CH3:24])[C:26]([CH:43]=[O:44])=[N:27][CH:28]=3)[S:22][C:13]=12

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 516892Sodium BicarbonateHCID 103902087-[(2,4-Dichloro-5-methoxyphenyl)amino]-2-iodothieno[3,2-b]pyridine-6-carbonitrileHCID 222566721-methyl-5-(tributylstannyl)-1H-imidazole-2-carbaldehyde

Product 1

HCID 100043027-[(2,4-dichloro-5-methoxyphenyl)amino]-2-(2-formyl-1-methyl-1H-imidazol-5-yl)thieno[3,2-b]pyridine-6-carbonitrileYield 52.2%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
110 °C

Procedure

A mixture of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-iodothieno[3,2-b]pyridine-6-carbonitrile (443.2 mg, 0.93 mmol), 1-methyl-5-(tributylstannyl)-1H-imidazole-2-carbaldehyde (743.1 mg, 1.86 mmol), dichlorobis(triphenylphosphine)palladium(II) (33.0 mg, 0.047 mmol) and triethylamine (103.2 mg, 1.02 mmol) in 8.0 mL of 1,4-dioxane is heated at 110° C. for 3 hours. After cooling, the mixture is treated with saturated aqueous sodium bicarbonate and extracted with ethyl acetate. The organic phases are washed with brine, dried over sodium sulfate, filtered and concentrated in vacuo. The residue is purified by flash column chromatography eluting with a gradient of 5% ethyl acetate in dichloromethane to 50% ethyl acetate in dichloromethane to provide 222.7 mg of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-(2-formyl-1-methyl-1H-imidazol-5-yl)thieno[3,2-b]pyridine-6-carbonitrile as a yellow solid, mp 225–227° C.; 1H NMR (DMSO-d6) δ 3.86 (s, 3H), 4.08 (d, 3H), 7.41 (s, 1H), 7.63 (s, 1H), 7.77 (s, 1H), 7.90 (s, 1H), 8.67 (s, 1H), 9.77 (s, 1H), 9.87 (s, 1H); MS 458.1, 460.1 (M+H)+.

Workup

  1. temperatureAfter cooling
  2. extractionextracted with ethyl acetate
  3. washThe organic phases are washed with brine
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe residue is purified by flash column chromatography
  8. washeluting with a gradient of 5% ethyl acetate in dichloromethane to 50% ethyl acetate in dichloromethane

Sources & evidence

ORD record
ord-f4719c22428f4c31a1e59ec07779d46f
Source dataset
uspto-grants-2007_10
Patent number
US07276519B2

Reaction notes

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