Hydroxyamine hydrochloride → 9-Ethyl-8-(4-hydroxyimino-piperidin-1-yl)-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile

HRID 61881Notes

Reaction equation

[CH2:1]([C:3]1[C:24]([N:25]2[CH2:30][CH2:29][C:28](=O)[CH2:27][CH2:26]2)=[CH:23][C:6]2[C:7]([CH3:22])([CH3:21])[C:8]3[NH:9][C:10]4[C:15]([C:16]=3[C:17](=[O:18])[C:5]=2[CH:4]=1)=[CH:14][CH:13]=[C:12]([C:19]#[N:20])[CH:11]=4)[CH3:2].Cl.[NH2:33][OH:34]>C(O)C.C(OCC)(=O)C>[CH2:1]([C:3]1[C:24]([N:25]2[CH2:30][CH2:29][C:28](=[N:33][OH:34])[CH2:27][CH2:26]2)=[CH:23][C:6]2[C:7]([CH3:22])([CH3:21])[C:8]3[NH:9][C:10]4[C:15]([C:16]=3[C:17](=[O:18])[C:5]=2[CH:4]=1)=[CH:14][CH:13]=[C:12]([C:19]#[N:20])[CH:11]=4)[CH3:2]

Participants

Conditions

Temperature: 60 °C

Procedure

9-Ethyl-6,6-dimethyl-11-oxo-8-(4-oxopiperidin-1-yl)-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile (30 mg) and hydroxylamine hydrochloric acid salt (10 mg) were dissolved in ethanol (5 ml) and stirred at 60° C. for 6 hrs. The reaction mixture was diluted with ethyl acetate (20 ml). The organic layer was washed with 10% brine and concentrated under reduced pressure. The resulting residues were purified by silica gel column (dichloromethane/methanol=99/1 to 90/10) to obtain the title compound (23.5 mg, yield 74%).

Workup

washThe organic layer was washed with 10% brine
concentrationconcentrated under reduced pressure
customThe resulting residues were purified by silica gel column (dichloromethane/methanol=99/1 to 90/10)

Sources & evidence

ORD record: ord-1fb2161f160e469688fad1ea50e74919
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09440922B2

Reaction notes

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