Ammonium Chloride → 2-Fluoro-N1-(2-(1-methyl-1H-imidazol-4-yl)thieno[3,2-b]pyridin-7-yl)benzene-1,4-diamine

HRID 418712Notes

Reaction equation

HRID 418712 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([N+:8]([O-])=O)[CH:5]=[CH:4][C:3]=1[NH:11][C:12]1[CH:17]=[CH:16][N:15]=[C:14]2[CH:18]=[C:19]([C:21]3[N:22]=[CH:23][N:24]([CH3:26])[CH:25]=3)[S:20][C:13]=12.[NH4+].[Cl-]>CO.O.[Fe]>[F:1][C:2]1[CH:7]=[C:6]([NH2:8])[CH:5]=[CH:4][C:3]=1[NH:11][C:12]1[CH:17]=[CH:16][N:15]=[C:14]2[CH:18]=[C:19]([C:21]3[N:22]=[CH:23][N:24]([CH3:26])[CH:25]=3)[S:20][C:13]=12

Participants

6

Reactant 2

HCID 25517Ammonium ChlorideHCID 59457676HCID 59457676, compound

Product 1

HCID 594577422-Fluoro-N1-(2-(1-methyl-1H-imidazol-4-yl)thieno[3,2-b]pyridin-7-yl)benzene-1,4-diamineYield 136.4%

Reagents, catalysts & solvents 3

HCID 23925IronCatalystHCID 887MethanolSolventHCID 962WaterSolvent

Procedure

To a stirred suspension of nitro compound 338 (370 mg, 1.00 mmol) in a mixture of MeOH (20 mL) and water (10 mL) were added iron powder (280 mg, 5.01 mmol) and NH4Cl (107 mg, 2.00 mmol). The reaction mixture heated to reflux for 2 hrs, cooled down to room temperature, filtered through Celite, and rinsed with methanol. The filtrate was concentrated, diluted a bit with methanol, precipitated with AcOEt/hexanes to afford title compound 339 (463 mg, quantitative yield, ammonium salt) as a yellow solid. MS (m/z): 340.0 (M+H)+.

Workup

  1. temperatureThe reaction mixture heated
  2. temperatureto reflux for 2 hrs
  3. filtrationfiltered through Celite
  4. washrinsed with methanol
  5. concentrationThe filtrate was concentrated
  6. additiondiluted a bit with methanol
  7. customprecipitated with AcOEt/hexanes

Sources & evidence

ORD record
ord-01e0f8c0b332411088c1b5e3ba7a954c
Source dataset
uspto-grants-2012_01
Patent number
US08093264B2

Reaction notes

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