反应详情

0.1 ml of triethylamine, 15 mg of 1,4-diazabicyclo[2.2.2]octane and 1.3 g of ethyl isocyanate are added to a solution of 4.49 g of 2-[2-chloro-4-(3-chlorophenoxy)phenoxy] ethanol in 40 ml of tetrahydrofuran. The reaction mixture is heated at 55° for 18 hours, with stirring, and then evaporated to dryness in vacuo. The residue is purified by chromatography [silica gel; diethyl ether/hexane (2:3)]. This gives the title compound which melts at 73°-74° C.

1. temperatureThe reaction mixture is heated at 55° for 18 hours
2. customevaporated to dryness in vacuo
3. customThe residue is purified by chromatography [silica gel; diethyl ether/hexane (2:3)]