Nitric Acid → HCID 67355472, compound

HRID 2272284Notes

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[O:9][C:10]3[CH:20]=[CH:19][C:18]([O:21][CH:22]([CH3:24])[CH3:23])=[CH:17][C:11]=3[C:12]=2[C:13]([O:15][CH3:16])=[O:14])=[CH:4][CH:3]=1.[N+:25]([O-])([OH:27])=[O:26]>C(Cl)(Cl)Cl>[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[O:9][C:10]3[CH:20]=[C:19]([N+:25]([O-:27])=[O:26])[C:18]([O:21][CH:22]([CH3:24])[CH3:23])=[CH:17][C:11]=3[C:12]=2[C:13]([O:15][CH3:16])=[O:14])=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of methyl 2-(4-fluorophenyl)-5-[(1-methylethyl)oxy]-1-benzofuran-3-carboxylate (6.16 g, 18.76 mmol) in chloroform (22 mL) at −15° C. was added dropwise a cold solution of 70% nitric acid (11 mL, 172 mmol) in chloroform (22 mL). After stirring at 0° C. for 1 hour, the reaction mixture was washed with water (50 mL) and the organic phase was separated by hydrophobic filter tube then evaporated under vacuum to afford a brown solid. The solid was triturated in methyl tert-butyl ether (25 mL) and the resulting pale yellow powder was filtered off, washed with heptane and dried under vacuum to give methyl 2-(4-fluorophenyl)-5-[(1-methylethyl)oxy]-6-nitro-1-benzofuran-3-carboxylate. LCMS (m/z, ES+)=764 (2M+NH4).

Workup

washthe reaction mixture was washed with water (50 mL)
customthe organic phase was separated by hydrophobic filter tube
customthen evaporated under vacuum
customto afford a brown solid
customThe solid was triturated in methyl tert-butyl ether (25 mL)
filtrationthe resulting pale yellow powder was filtered off
washwashed with heptane
customdried under vacuum

Sources & evidence

ORD record: ord-2c3c839275a94c4490dba6155d4bcab7
Source dataset: uspto-grants-2015_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09119868B2

Reaction notes

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