反应详情

温度

80 °C

Thiourea (3.04 g, 0.04 mol) was added to a solution of 3-chloro-4-methoxybenzyl bromide (4.0 g, 0.02 mol) in ethanol (200 ml) and refluxed for 16 hours. The reaction mixture was concentrated in vacuo and the residue was subsequently dissolved in aqueous sodium hydroxide solution (30 g, 0.75 mol in 300 ml water) and heated at 80° C. for one hour. The reaction mixture was cooled with an ice bath and acidified by addition of concentrated hydrochloric acid. The product was isolated by extraction three times into diethyl ether. The combined organic phases were dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo, to give the sub-title compound as a colourless oil in 83% yield (3.0 g).

1. temperaturerefluxed for 16 hours
2. concentrationThe reaction mixture was concentrated in vacuo
3. temperatureThe reaction mixture was cooled with an ice bath
4. dry with materialThe combined organic phases were dried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo