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Water → 6-fluoro-3-oxo-N-(5-phenyl-2-pyrazinyl)spiro-[isobenzofuran-1(3H),4'-piperidine]-1'-carboxamide

HRID 392792
Notes
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Reaction equation

HRID 392792 reaction equation
Cl.[F:2][C:3]1[CH:16]=[C:15]2[C:6]([C:7](=[O:17])[O:8][C:9]32[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]3)=[CH:5][CH:4]=1.[C:18]1([C:24]2[N:25]=[CH:26][C:27]([NH:30][C:31](=O)[O:32]C3C=CC=CC=3)=[N:28][CH:29]=2)[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.C(N(CC)CC)C.O>C(Cl)(Cl)Cl>[F:2][C:3]1[CH:16]=[C:15]2[C:6]([C:7](=[O:17])[O:8][C:9]32[CH2:14][CH2:13][N:12]([C:31]([NH:30][C:27]2[CH:26]=[N:25][C:24]([C:18]4[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=4)=[CH:29][N:28]=2)=[O:32])[CH2:11][CH2:10]3)=[CH:5][CH:4]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 962WaterHCID 8471TriethylamineHCID 9879110Phenyl 5-phenylpyrazin-2-ylcarbamateHCID 226607736-fluorospiro[isobenzofuran-1(3H),4'-piperidine]-3-one hydrochloride

Product 1

HCID 98882676-fluoro-3-oxo-N-(5-phenyl-2-pyrazinyl)spiro-[isobenzofuran-1(3H),4'-piperidine]-1'-carboxamideYield 97.2%

Reagents, catalysts & solvents

1
HCID 6212ChloroformSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 6-fluorospiro[isobenzofuran-1(3H),4′-piperidine]-3-one hydrochloride (64 mg), phenyl N-(5-phenyl-2-pyrazinyl)carbamate (73 mg) and triethylamine (174 μL) in chloroform (5 mL) was stirred at 80° C. for 2 hours. The reaction mixture was poured into water and extracted with chloroform (20 mL). The organic layer was washed with saturated saline solution (20 mL), then dried over anhydrous Na2SO4 and concentrated. The residue was purified by column chromatography on silica gel (hexane/ethyl acetate=4/1 to 1/2) and recrystallized from ethyl ether-hexane to give the subject compound (101 mg) as colorless crystals (melting point 222-224° C.).

Workup

  1. extractionextracted with chloroform (20 mL)
  2. washThe organic layer was washed with saturated saline solution (20 mL)
  3. dry with materialdried over anhydrous Na2SO4
  4. concentrationconcentrated
  5. customThe residue was purified by column chromatography on silica gel (hexane/ethyl acetate=4/1 to 1/2)
  6. customrecrystallized from ethyl ether-hexane

Sources & evidence

ORD record
ord-9d4cfa75157943fd8fd74f13d46ed1dc
Source dataset
uspto-grants-2004_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06803372B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes