1,4-Dibromo-2-butyne → 1-(4-Bromo-2-butyn-1-yl)-5, 6-dichloro-3-ethyl-2-methylbenzimidazolium bromide

関与物質

反応手順

5,6-Dichloro-1-ethyl-2-methylbenzimidazole (11.5 g., 0.05 moles) and 1,4-dibromo-2-butyne (31 g., 0.15 moles) were mixed together and stirred at room temperature overnight. The reaction mixture was treated with ether, the solid was collected by filtration, washed with ether and dried. It was recrystallized from acetonitrile containing 5% water (400 ml). The product was recovered in two crops. Yield 20.2 g (92%), mp. 185°-189° C.

情報源と証拠