Water → 2-Iodo-6-nitrobenzonitrile

HRID 711736Notes

Reaction equation

N[C:2]1[CH:9]=[CH:8][CH:7]=[C:6]([N+:10]([O-:12])=[O:11])[C:3]=1[C:4]#[N:5].N([O-])=O.[Na+].[I-:17].[K+].O>OS(O)(=O)=O.C(O)(=O)C>[I:17][C:2]1[CH:9]=[CH:8][CH:7]=[C:6]([N+:10]([O-:12])=[O:11])[C:3]=1[C:4]#[N:5]

Participants

Conditions

Temperature: 45 °C

Procedure

2-Amino-6-nitrobenzonitrile (Example 130e) (4.32 g, 26.5 mmol) was added in small portions to a suspension of sodium nitrite (2.19 g, 31.7 mmol) in concentrated H2SO4 (43 mL) and acetic acid (43 mL) at 45° C. The reaction was heated at 45° C. for 1 h and then added in small portions to a solution of potassium iodide (7.47 g, 45.0 mmol) in H2SO4 (1 M, 43 mL). After stirring at room temperature for 1.5 h, iced water was added to the reaction and the precipitated product was collected by filtration. The product was purified by chromatography on silica gel eluting with CH2Cl2, to give 2-iodo-6-nitrobenzonitrile (3.86 g, 53%) as a yellow solid. 1H-NMR (400 MHz, DMSO-d6) δ 8.46-8.52 (m, 1H), 8.34-8.38 (m, 1H), 7.66-7.71 (m, 1H).

Workup

filtrationthe precipitated product was collected by filtration
customThe product was purified by chromatography on silica gel eluting with CH2Cl2

Sources & evidence

ORD record: ord-bcb1027035014acbbfc8d9bfac44d08f
Source dataset: uspto-grants-2015_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09181276B2

Reaction notes

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