反应详情

Iron powder, 27.9 g (0.5 mol), is added to a mixture of 2-methyl-5-(3-nitrophenyl)-1,3,4-oxadiazole, (0.053 mol), in 1000 ml of ethyl alcohol with stirring. The mixture is heated to reflux and 1.73 ml of concentrated hydrochloric acid in 10 ml of ethyl alcohol is added dropwise. The mixture is reluxed three hours, 20 ml of 1 normal potassium hydroxide is added, the mixture filtered, and the filtrate evaporated. The residue is dissolved in dichloromethane, washed with water, and the methylene chloride layer separated and evaporated to give 7.05 g of 3-(5-methyl-1,3,4-oxadiazol-2-yl) benzenamine after recrystallization from 2-propanol; mp 139°-140° C.

1. temperatureThe mixture is heated
2. temperatureto reflux
3. filtrationthe mixture filtered
4. customthe filtrate evaporated
5. dissolutionThe residue is dissolved in dichloromethane
6. washwashed with water
7. customthe methylene chloride layer separated
8. customevaporated