Ethanol → 1-[4-Amino-5-(2,4-dichlorophenyl)sulfanyl-2-thienyl]ethanone

HRID 1192046Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[S:9][C:10]1[S:14][C:13]([C:15](=[O:17])[CH3:16])=[CH:12][C:11]=1[N+:18]([O-])=O.C(O)C.[Cl-].[NH4+]>[Fe].O>[NH2:18][C:11]1[CH:12]=[C:13]([C:15](=[O:17])[CH3:16])[S:14][C:10]=1[S:9][C:3]1[CH:4]=[CH:5][C:6]([Cl:8])=[CH:7][C:2]=1[Cl:1]

Participants

Conditions

Temperature: 80 °C

Procedure

To a two necked 250 mL round bottom flask, charged with 1-[5-(2,4-Dichlorophenylsulfanyl)-4-nitro-2-thienyl]ethanone (7.0 g, 20.2 mmol) prepared as in example 2, 50 mL ethanol and 50 mL of water followed by ammonium chloride (4.32 g, 80.8 mmol) and iron powder (4.53 g, 80.8 mmol). The resulting reaction mixture was heated at 80° C. for 2 hours. After this time, the reaction mixture was cooled to ambient temperature and was passed through a cellite cartridge. The filtrate was concentrated and water was added to the residue and extracted with ethyl acetate. The combined organic layer was separated, dried (Na2SO4), filtered and concentrated to afford the title product (6.4 g, 78% yield). 1H NMR (400 MHz, d6-DMSO) δ: 7.64 (1H, s), 7.44 (1H, s), 7.37 (1H, m), 6.68 (1H, m), 2.50 (3H, s).

Workup

customThe resulting reaction mixture
temperatureAfter this time, the reaction mixture was cooled to ambient temperature
concentrationThe filtrate was concentrated
additionwater was added to the residue
extractionextracted with ethyl acetate
customThe combined organic layer was separated
dry with materialdried (Na2SO4)
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-913ec79a6d06446b893fc8fe89f84f74
Source dataset: uspto-grants-2014_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08680139B2

Reaction notes

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