反应详情

0.92 g of p-methoxyphenacyl bromide is added to a solution of 0.32 g of 1-[[p-(dimethylamino)-benzylidene]amino]-2-(p-methoxyphenyl)imidazole in 20 ml of 2-propanol. After stirring for 3 days with the exclusion of light, the mixture is evaporated. The residue is placed on a column loaded with 20 g of silica gel. The product is eluted with methylene chloride/methanol (9:1). After crystallization from ethanol/ether, there is obtained 3-[[p-(dimethylamino)benzylidene]amino]-2-(p-methoxyphenyl)-1-(p-methoxyphenacyl)imidazolium bromide of melting point 188°-191°.

1. customthe mixture is evaporated
2. washThe product is eluted with methylene chloride/methanol (9:1)
3. customAfter crystallization from ethanol/ether