反应详情

In a mixture of concentrated hydrochloric acid (14 ml) and ethanol (14 ml) was dissolved 2.87 g of 2-[2-(4-pyridyl)ethenyl]-1-nitrobenzene. To this solution was added a solution of stannous chloride dihydrate (8.59 g) in ethanol (25 ml) gradually dropwise under ice-cooling and the mixture was stirred at room temperature for 5 hours. After the solvent was evaporated off under reduced pressure, the residue was made basic with 30% aqueous sodium hydroxide solution and extracted with chloroform. The extract was dehydrated over anhydrous magnesium sulfate and the solvent was evaporated off to provide 2.2 g of the title compound as yellow solid. This product was used as a starting material without purification.

1. temperaturecooling
2. customAfter the solvent was evaporated off under reduced pressure
3. extractionextracted with chloroform
4. customthe solvent was evaporated off