Acetonitrile → 8-benzyl-2-bromo-N-methyl-N-(1-methylethyl)-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepin-3-amine

HRID 518083Notes

Reaction equation

[CH2:1]([N:8]1[CH2:14][C:13]2[N:15]=[CH:16][C:17]([N:19]([CH3:23])[CH:20]([CH3:22])[CH3:21])=[N:18][C:12]=2[O:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Br:24]N1C(=O)CCC1=O.C(#N)C>O>[CH2:1]([N:8]1[CH2:14][C:13]2[N:15]=[C:16]([Br:24])[C:17]([N:19]([CH3:23])[CH:20]([CH3:21])[CH3:22])=[N:18][C:12]=2[O:11][CH2:10][CH2:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of 8-benzyl-N-methyl-N-(1-methylethyl)-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepin-3-amine (500 mg), N-bromosuccinimide (342 mg) and acetonitrile (10 mL) was stirred at room temperature for 16 hr and at 50° C. for 24 hr. Water was added, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (solvent gradient: 0-40% ethyl acetate/hexane) to give the title compound (122 mg, 20%) as a colorless oil.

Workup

extractionthe mixture was extracted with ethyl acetate
washThe organic layer was washed with water and saturated brine
dry with materialdried over sodium sulfate
concentrationconcentrated under reduced pressure
customThe obtained residue was purified by silica gel column chromatography (solvent gradient: 0-40% ethyl acetate/hexane)

Sources & evidence

ORD record: ord-d133dc29d61a445390d970adba983113
Source dataset: uspto-grants-2015_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09115139B2

Reaction notes

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