Water → N-(4-benzoylphenyl)-3-oxospiro[isobenzofuran-1(3H),4'-piperidine]-1'-carboxamide

HRID 2086354Notes

Reaction equation

Cl.[NH:2]1[CH2:7][CH2:6][C:5]2([C:15]3[C:10](=[CH:11][CH:12]=[CH:13][CH:14]=3)[C:9](=[O:16])[O:8]2)[CH2:4][CH2:3]1.[C:17]([C:25]1[CH:30]=[CH:29][C:28]([NH:31][C:32](=O)[O:33]C2C=CC=CC=2)=[CH:27][CH:26]=1)(=[O:24])[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.C(N(CC)CC)C.O>C(Cl)(Cl)Cl>[C:17]([C:25]1[CH:30]=[CH:29][C:28]([NH:31][C:32]([N:2]2[CH2:7][CH2:6][C:5]3([C:15]4[C:10](=[CH:11][CH:12]=[CH:13][CH:14]=4)[C:9](=[O:16])[O:8]3)[CH2:4][CH2:3]2)=[O:33])=[CH:27][CH:26]=1)(=[O:24])[C:18]1[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=1

Participants

Conditions

Temperature: 80 °C

Procedure

A mixture of spiro[isobenzofuran-1(3H),4′-piperidine]-3-one hydrochloride (48 mg), phenyl N-(4-benzoylphenyl)carbamate (58 mg) and triethylamine (0.14 mL) 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 (81 mg) as colorless crystals (melting point 161-163).

Workup

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

Sources & evidence

ORD record: ord-e9022b53c23d404e9fd3254b94bded8f
Source dataset: uspto-grants-2004_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06723847B2

Reaction notes

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