Reaktion #161417

Reaktionsgleichung

potassium carbonate

5-(benzoxazol-2-yl)-2-(tetrahydropyran-4-yl)aminoaniline

furfural

oxone

→

title compound

Ausbeute 49.0%

5-(benzoxazol-2-yl)-2-(furan-2-yl)-1-(tetrahydropyran-4-yl)benzimidazole

Ausbeute 49.0%

Lösungsmittel

dimethylformamide

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationthis was filtered
2. 2
   Waschenwashed with water
3. 3
   SonstigeThe crystals obtained
4. 4
   Sonstigewere purified by silica gel column chromatography

Vorschrift

To a solution of 5-(benzoxazol-2-yl)-2-(tetrahydropyran-4-yl)aminoaniline (see Working Example 20-2) (200 mg, 0.646 mmol) in dimethylformamide (2 mL) was added furfural (80.7 mg, 0.840 mmol) and oxone (258 mg, 0.420 mmol), and this was stirred at room temperature for 3 hours. After the reaction was complete, aqueous potassium carbonate solution was added, this was filtered and washed with water. The crystals obtained were purified by silica gel column chromatography to yield the title compound (121 mg, 49% yield) as pale yellow crystals.

Quelle