Thiourea → HCID 58442520, compound

HRID 1480704Notes

Reaction equation

HRID 1480704 reaction equation
Br[CH2:2][C:3]([C:5]1[C:10]([CH3:11])=[CH:9][C:8]([O:12][CH2:13][CH2:14][O:15][CH3:16])=[CH:7][C:6]=1[CH3:17])=O.[NH2:18][C:19]([NH2:21])=[S:20]>CCO>[CH3:16][O:15][CH2:14][CH2:13][O:12][C:8]1[CH:9]=[C:10]([CH3:11])[C:5]([C:3]2[N:18]=[C:19]([NH2:21])[S:20][CH:2]=2)=[C:6]([CH3:17])[CH:7]=1

Participants

4

Reactant 2

HCID 2723790ThioureaHCID 58442466HCID 58442466, compound

Product 1

HCID 58442520HCID 58442520, compoundYield 94%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A reaction mixture containing 2-bromo-1-(4-(2-methoxyethoxy)-2,6-dimethylphenyl)ethanone (322.9 mg, 1.1 mmol, 1.0 equiv) and thiourea (81.61 mg, 1.1 mmol, 1.0 equiv) in EtOH (3.0 mL) was heated at reflux for 16 h. The solution was concentrated under reduced pressure, and the residue was re-dissolved in EtOAc (20 mL). The solution was washed with saturated aqueous NaHCO3 (30 mL), dried over MgSO4, and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (30% EtOAc in hexanes as eluant) to provide 4-(4-(2-methoxyethoxy)-2,6-dimethylphenyl)thiazol-2-amine (281.0 mg, 1.0 mmol) as yellow solids in 94% yield: 1H NMR (DMSO-d6, 500 MHz) δ 6.76 (s, 2H), 5.31-5.33 (m, 1H), 4.09-4.11 (m, 2H), 3.64-3.65 (m, 2H), 3.30 (s, 3H), 2.12 (s, 6H); ESI-MS: m/z 279.7 (M+H)+.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 16 h
  3. concentrationThe solution was concentrated under reduced pressure
  4. dissolutionthe residue was re-dissolved in EtOAc (20 mL)
  5. washThe solution was washed with saturated aqueous NaHCO3 (30 mL)
  6. dry with materialdried over MgSO4
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified by column chromatography on silica gel (30% EtOAc in hexanes as eluant)

Sources & evidence

ORD record
ord-06499b8cbda94f8f9c6f429e6f7bf946
Source dataset
uspto-grants-2016_08
Patent number
US09409902B2

Reaction notes

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