反应详情

温度

135 °C

A mixture of diethyl 2-(2-chloro-4-cyanobenzyl)malonate (9.0 g, 0.03 mol), sodium chloride (2.12 g, 0.04 mol), and water (0.86 g 0.05 mol) in 30 mL of DMSO was heated to 135° C. and then the temperature was gradually raised to 170° C. over a 3 h period. The mixture was diluted with water and extracted with ether. Evaporation and distillation gave ethyl 3-(2-chloro-4-cyanophenyl)propanoate as an oil: 5.8 g; bp 138°-140° C. (0.1 mm Hg) Anal. calcd for C12H12ClNO2 : C, 60.64; H, 5.09; N, 5.89. Found: C, 60.48; H, 5.08; N, 5.84.

1. temperaturethe temperature was gradually raised to 170° C. over a 3 h period
2. extractionextracted with ether
3. customEvaporation and distillation