Water → (RS)-1-[1-(acenaphthen-1-yl)piperidin-4-yl]-1,3-dihydro-3-methyl-2H-benzoimidazole-2-thione

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Reaktionsgleichung

[CH:1]1([N:13]2[CH2:18][CH2:17][CH:16]([N:19]3[C:23]4[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=4[NH:21][C:20]3=[S:28])[CH2:15][CH2:14]2)[C:11]2=[C:12]3[C:7](=[CH:8][CH:9]=[CH:10]2)[CH:6]=[CH:5][CH:4]=[C:3]3[CH2:2]1.[H-].[Na+].[CH3:31]I.O>CN(C=O)C>[CH:1]1([N:13]2[CH2:18][CH2:17][CH:16]([N:19]3[C:23]4[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=4[N:21]([CH3:31])[C:20]3=[S:28])[CH2:15][CH2:14]2)[C:11]2=[C:12]3[C:7](=[CH:8][CH:9]=[CH:10]2)[CH:6]=[CH:5][CH:4]=[C:3]3[CH2:2]1

Komponenten

Reaktionsbedingungen

Temperatur: 50 °C

Versuchsvorschrift

(RS)-1-[1-(Acenaphthen-1-yl)piperidin-4-yl]-1,3-dihydro-2H-benzoimidazole-2-thione (1 g, 2.6 mmol) was dissolved in DMF (15 ml) and sodium hydride (120 mg, 60%) was added. The suspension was stirred at 50° C. for 30 min. After cooling to room temperature, methyl iodide (0.4 g, 2.8 mmol) was added and the mixture was stirred for 1 hr. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The extract was washed with water and saturated aqueous ammonium chloride solution, dried over magnesium sulfate, and concentrated. The obtained residue was purified by silica gel column chromatography (chloroform/methanol) to give the title compound (1.05 g) as pale-yellow crystals.

Aufarbeitung

temperatureAfter cooling to room temperature
stirringthe mixture was stirred for 1 hr
extractionthe mixture was extracted with ethyl acetate
washThe extract was washed with water and saturated aqueous ammonium chloride solution
dry with materialdried over magnesium sulfate
concentrationconcentrated
customThe obtained residue was purified by silica gel column chromatography (chloroform/methanol)

Quellen und Nachweise

ORD-Eintrag: ord-7de387ea2d3241f09d20c361bc87c93b
Quelldatensatz: uspto-grants-2011_08
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08003669B2

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