Diethyl Ether → HCID 21072857, compound

HRID 1867312Notes

Reaction equation

HRID 1867312 reaction equation
C([C:4]1C=C(OC)[CH:7]=[CH:6][C:5]=1[NH:12][C:13](=[O:17])[O:14][CH2:15][CH3:16])(=O)C.[CH3:18][Mg]I.[Cl-].[NH4+].[CH2:23]([O:25][CH2:26][CH3:27])C>C1COCC1>[CH3:23][O:25][C:26]1[CH:27]=[CH:4][C:5]2[O:12][C:13](=[O:17])[NH:14][C:15]([CH3:16])([CH3:18])[C:6]=2[CH:7]=1

Participants

6

Reactant 4

HCID 3283Diethyl EtherHCID 25517Ammonium ChlorideHCID 13365077Ethyl (2-acetyl-4-methoxyphenyl)carbamateHCID 178418373HCID 178418373, compound

Product 1

HCID 21072857HCID 21072857, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

47.4 g (0.2 mol) of ethyl (2-acetyl-4-methoxyphenyl)carbamate, dissolved in 275 mL of THF, are added dropwise to a solution of 0.5 mol of methylmagnesium iodide in 200 mL of diethyl ether while cooling so that the temperature does not exceed 0° C. The mixture is stirred for 30 minutes at ambient temperature and then for 2 hours at reflux temperature. The reaction mixture is poured onto ice and combined with ammonium chloride. After the organic phase has been separated off, it is repeatedly extracted with ethyl acetate. The organic phases are combined, washed with water, dried with sodium sulfate, and evaporated down. The residue is dissolved in methanol and the solution is evaporated down and then combined with water. The precipitate formed is separated off, washed with water and recrystallized from toluene. Yield: 31.1 g (75%); m.p.=178° C.-180° C.

Workup

  1. temperaturewhile cooling so that the temperature
  2. customdoes not exceed 0° C
  3. temperaturefor 2 hours at reflux temperature
  4. additionThe reaction mixture is poured onto ice
  5. customAfter the organic phase has been separated off
  6. extractionit is repeatedly extracted with ethyl acetate
  7. washwashed with water
  8. dry with materialdried with sodium sulfate
  9. customevaporated down
  10. dissolutionThe residue is dissolved in methanol
  11. customthe solution is evaporated down
  12. customThe precipitate formed
  13. customis separated off
  14. washwashed with water
  15. customrecrystallized from toluene

Sources & evidence

ORD record
ord-a604d9905aa141e9887da889cb93bc5e
Source dataset
uspto-grants-2009_12
Patent number
US07632834B2

Reaction notes

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