Sodium Cyanide → 3-(5-Bromobenzo[b]thien-2-yl)-2-(4-methoxyphenyl)butyronitrile

HRID 53979

Reaktionsgleichung

[C-:1]#[N:2].[Na+].CS(OC[CH:10]([C:22]1[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=1)[CH2:11][C:12]1[S:16][C:15]2[CH:17]=[CH:18][C:19]([Br:21])=[CH:20][C:14]=2[CH:13]=1)(=O)=O.[C:30](OCC)(=O)C.C1(C)C=CC=CC=1>CS(C)=O>[Br:21][C:19]1[CH:18]=[CH:17][C:15]2[S:16][C:12]([CH:11]([CH3:30])[CH:10]([C:22]3[CH:23]=[CH:24][C:25]([O:28][CH3:29])=[CH:26][CH:27]=3)[C:1]#[N:2])=[CH:13][C:14]=2[CH:20]=1

Komponenten

Reaktionsbedingungen

Temperatur: 80 °C

Versuchsvorschrift

1.2 g of sodium cyanide was dissolved in 30 ml of dimethyl sulfoxide at a temperature of 90° C. To this was gradually added 18.5 g of 3-(5-bromobenzo[b]thien-2-yl)-2-(4-methoxyphenyl)propyl methanesulfonate, followed by stirring at 80° C. for 1 hour. The resulting reaction solution was mixed with an ethyl acetate/toluene mixture, washed with water, and then dried to distill off the solvent. Crystals thus precipitated were washed with ethanol and dried to obtain 5 g of 3-(5-bromobenzo[b]thien-2-yl)-2-(4-methoxyphenyl)butyronitrile. The same compound was also obtained with a yield of 2 g, by concentrating the ethanol solution resulting from the washing of crystals and subjecting the concentrate to silica gel column chromatography using chloroform as an elution solvent.

Aufarbeitung

customThe resulting reaction solution
washwashed with water
customdried
distillationto distill off the solvent
customCrystals thus precipitated
washwere washed with ethanol
customdried

Quellen und Nachweise

ORD-Eintrag: ord-0a431eb0d9a34e96b2de1cf841029c88
Quelldatensatz: uspto-grants-1997_04
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US05620991

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