Ammonium Chloride → HCID 66844939, compound

HRID 2064733Notes

Reaction equation

HRID 2064733 reaction equation
[CH3:1][O:2][C:3]([C:5]1[N:6]=[C:7]([CH3:19])[S:8][C:9]=1[C:10]1[CH:15]=[CH:14][CH:13]=[C:12]([N+:16]([O-])=O)[CH:11]=1)=[O:4].[Cl-].[NH4+]>CCO.O.C(Cl)Cl.[Fe]>[CH3:1][O:2][C:3]([C:5]1[N:6]=[C:7]([CH3:19])[S:8][C:9]=1[C:10]1[CH:15]=[CH:14][CH:13]=[C:12]([NH2:16])[CH:11]=1)=[O:4]

Participants

7

Reactant 2

HCID 25517Ammonium ChlorideHCID 668446302-Methyl-5-(3-nitrophenyl)thiazole-4-carboxylic acid methyl ester

Product 1

HCID 66844939HCID 66844939, compound

Reagents, catalysts & solvents 4

HCID 23925IronCatalyst3×HCID 702EthanolSolventHCID 962WaterSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
80 °C

Procedure

Iron powder (53.7 mmol) is added to a suspension of 2-methyl-5-(3-nitro-phenyl)-thiazole-4-carboxylic acid methyl ester (44.1 mmol) and ammonium chloride (221 mmol) in a mixture of EtOH (100 mL) and water (50 mL). The mixture is stirred at 80° C. for 4 h, iron powder (53.7 mmol) is added and heating is continued for additional 3 h. After addition of a third portion of iron powder (26.8 mmol) the mixture is heated at 80° C. for additional 3 h, cooled to RT, diluted with DCM and filtered through Celite. The residue is washed with DCM and water and the filtrate is concentrated in vacuo. A sat. aqueous NaHCO3 solution and DCM are added and the layers are separated. The organic layer is washed with water, dried over MgSO4 and concentrated in vacuo to give a crude product which is used without further purification. LC-MS: tR=0.67 min; [M+H]+=249.4.

Workup

  1. temperatureheating
  2. waitis continued for additional 3 h
  3. temperatureis heated at 80° C. for additional 3 h
  4. temperaturecooled to RT
  5. filtrationfiltered through Celite
  6. washThe residue is washed with DCM and water
  7. concentrationthe filtrate is concentrated in vacuo
  8. additionA sat. aqueous NaHCO3 solution and DCM are added
  9. customthe layers are separated
  10. washThe organic layer is washed with water
  11. dry with materialdried over MgSO4
  12. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-5a79479950044122acf144b6add33f7c
Source dataset
uspto-grants-2012_10
Patent number
US08288435B2

Reaction notes

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