Ammonium Chloride → HCID 69103232, compound

HRID 2217240Notes

Reaction equation

HRID 2217240 reaction equation
[NH2:1][C:2]1[C:3]([C:24](N(OC)C)=[O:25])=[N:4][C:5]([C:14]2[CH:19]=[CH:18][C:17](=[O:20])[N:16]([CH:21]([CH3:23])[CH3:22])[CH:15]=2)=[C:6]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[N:7]=1.[CH3:30][Mg]Cl.[Cl-].[NH4+]>C1COCC1>[C:24]([C:3]1[N:4]=[C:5]([C:14]2[CH:19]=[CH:18][C:17](=[O:20])[N:16]([CH:21]([CH3:23])[CH3:22])[CH:15]=2)[C:6]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[N:7][C:2]=1[NH2:1])(=[O:25])[CH3:30]

Participants

5

Reactant 3

HCID 25517Ammonium ChlorideHCID 86598207HCID 86598207, compoundHCID 178418332HCID 178418332, compound

Product 1

HCID 69103232HCID 69103232, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

Under ice-bath cooling, to a suspension of 3-amino-6-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridyl)-N-methoxy-N-methyl-5-phenyl-2-pyrazinecarboxamide (200 mg) in THF (4.0 ml) was added 3.0M solution of methylmagnesium chloride in THF (0.85 ml) dropwise. The mixture was stirred at the same temperature for 5 hours. The mixture was poured into sat. aq ammonium chloride (20 ml) and an organic layer was extracted with EtOAc (50 ml), washed with water and brine, and dried over MgSO4. The solvent was removed under reduced pressure. The residue was purified by silica-gel column chromatography (CH2Cl2:MeOH=50:1-15:1). The desired fraction was recrystallized from MeOH and dried in vacuo to give 5-(6-acetyl-5-amino-3-phenyl-2-pyrazinyl)-1-isopropyl-2(1H)-pyridone (111 mg).

Workup

  1. extractionan organic layer was extracted with EtOAc (50 ml)
  2. washwashed with water and brine
  3. dry with materialdried over MgSO4
  4. customThe solvent was removed under reduced pressure
  5. customThe residue was purified by silica-gel column chromatography (CH2Cl2:MeOH=50:1-15:1)
  6. customThe desired fraction was recrystallized from MeOH
  7. customdried in vacuo

Sources & evidence

ORD record
ord-28c4e17f3df04daf95ed99a89e105a1d
Source dataset
uspto-grants-2008_08
Patent number
US07407961B2

Reaction notes

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