Water → 1-Ethyl-7-methoxy-5-methyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione

HRID 69039Notes

Reaction equation

[H-].[Na+].[CH3:3][O:4][C:5]1[CH:6]=[CH:7][C:8]2[NH:14][C:13](=[O:15])[CH2:12][C:11](=[O:16])[N:10]([CH3:17])[C:9]=2[CH:18]=1.[CH2:19](I)[CH3:20].O>CN(C)C=O.C(OCC)(=O)C>[CH2:19]([N:14]1[C:13](=[O:15])[CH2:12][C:11](=[O:16])[N:10]([CH3:17])[C:9]2[CH:18]=[C:5]([O:4][CH3:3])[CH:6]=[CH:7][C:8]1=2)[CH3:20]

Participants

Conditions

Temperature: 0 °C

Procedure

Sodium hydride (60% in oil, 44 mg) was suspended in dimethylformamide (DMF) (8 ml), and cooled in an ice water bath to 0° C. 8-Methoxy-1-methyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione (220 mg) was added to the suspension at the same temperature, and stirred at 0° C. for 1 hour. Ethyl iodide (187 mg) was added to the mixture and stirred at room temperature overnight. Water was added to the reaction mixture, and extraction with ethyl acetate was performed. The organic layer was dried over sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=4:1→1:1). The purified product was concentrated to dryness under reduced pressure to give the title compound (190.2 mg) as a yellow solid.

Workup

stirringstirred at room temperature overnight
dry with materialThe organic layer was dried over sodium sulfate
concentrationconcentrated under reduced pressure
customThe residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=4:1→1:1)
concentrationThe purified product was concentrated to dryness under reduced pressure

Sources & evidence

ORD record: ord-40c0996b514d48f58275be26b4a30de4
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08822453B2

Reaction notes

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