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

HRID 1935690Notes

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° C.).

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-86b8f773c6974cb68e600af6759d12f8
Source dataset: uspto-grants-2002_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06388077B1

Reaction notes

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