Reaktion #2166358

Reaktionsgleichung

4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylamine

3,4-dimethoxybenzaldehyde

1g

2-{3-[(4-carbamimidoylphenylamino)-(2-fluoro-4,5-dimethoxyphenyl)methyl]5-oxo-4,5-dihydro-[1,2,4]triazol-1-yl}benzoic Acid trifluoroacetate

trimethylsilyl cyanide

Yb(OTf)3

→

title compound

(3,4-dimethoxyphenyl)-[4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylamino]acetonitrile

Lösungsmittel

ethyl acetate

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationwas filtered through celite
2. 2
   Waschenthe celite was washed with 200 ml of ethyl acetate
3. 3
   Waschenwashed with water and saturated brine
4. 4
   Trocknendried over anhydrous magnesium sulfate
5. 5
   FiltrationThe desiccating agent was filtered off
6. 6
   Einengenthe filtrate was concentrated under reduced pressure
7. 7
   SonstigeThe residue was purified by silica gel column chromatography (ethyl acetate-heptane)

Vorschrift

After adding 0.887 g of 4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylamine, 0.831 g of 3,4-dimethoxybenzaldehyde, 1g of MS3A and 1 ml of trimethylsilyl cyanide to a solution of 0.31 g of Yb(OTf)3 in 20 ml of dichloromethane under a nitrogen atmosphere, the mixture was stirred at room temperature for 22 hours. After then adding 200 ml of ethyl acetate to the reaction mixture, it was filtered through celite and the celite was washed with 200 ml of ethyl acetate. The organic layers were combined and washed with water and saturated brine, and then dried over anhydrous magnesium sulfate. The desiccating agent was filtered off and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate-heptane) to give the title compound (1.75 g) as a light yellow solid.

Quelle