4-methoxy-N-(4-nitrophenyl)aniline → HCID 10243439, compound

HRID 1879547Notes

Reaction equation

[CH3:1][O:2][C:3]1[CH:18]=[CH:17][C:6]([NH:7][C:8]2[CH:13]=[CH:12][C:11]([N+:14]([O-:16])=[O:15])=[CH:10][CH:9]=2)=[CH:5][CH:4]=1>CC(O)=O.CC([O-])=O.CC([O-])=O.[Pd+2]>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[NH:7][C:8]3[C:13]([C:17]=2[CH:18]=1)=[CH:12][C:11]([N+:14]([O-:16])=[O:15])=[CH:10][CH:9]=3

Participants

Conditions

Temperature: 100 °C

Procedure

To 4-methoxy-N-(4-nitrophenyl)aniline (785 mg, 3.2 mmol) in 5 mL of AcOH was added Pd(OAc)2 (1.43 g, 6.4 mmol). The mixture was heated at 100° C. for 15 h under air atmosphere and cooled to rt and concentrated under reduced pressure. The residue was taken up in EtOAc (100 mL) and washed with NaHCO3 (2×100 mL) and water (100 mL). After solvent removal, the crude was purified with chromatography (hexane/EtOAc) to afford 3-methoxy-6-nitro-9H-carbazole as a orange solid (495 mg, 64%). 1H NMR (400 MHz, acetone-d6) δ 10.90 (s, 1H), 9.09 (d, J=2.4 Hz, 1H), 8.27 (dd, J=9.2, 2.4 Hz, 1H), 7.96 (d, J=2.4 Hz, 1H), 7.62 (d, J=9.2 Hz, 1H), 7.53 (d, J=8.8 Hz, 1H), 7.14 (dd, J=8.8, 2.8 Hz, 1H), 3.92 (s, 3H); MS (ESI) m/z 243 (M+H+).

Workup

temperaturecooled to rt
concentrationconcentrated under reduced pressure
washwashed with NaHCO3 (2×100 mL) and water (100 mL)
customAfter solvent removal
customthe crude was purified with chromatography (hexane/EtOAc)

Sources & evidence

ORD record: ord-98ba58cf53cc42438a2cf6c904477f80
Source dataset: uspto-grants-2012_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08318132B2

Reaction notes

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