Kinetics for dichlorocyclopropanation of 1,7-octadiene under the influence of ultrasound assisted phase-transfer catalysis conditions

The kinetics for dichlorocyclopropanation of 1,7-octadiene with an excess of chloroform has been studied under phase-transfer catalysts and ultrasound irradiation conditions using aqueous sodium hydroxide as the base. The reaction was carried out at 30 °C and a pseudo-first order rate is used to describe the reaction rate at high alkaline concentration (>50 wt.%). Kinetics of the reaction including the effects of the reaction conditions on the conversion of 1,7-octadiene was investigated. A rational explanation was made for a peculiar phenomenon that the conversion of 1,7-octadiene was increased and then decreased with an increase in the amount of sodium hydroxide and the amount of phase-transfer catalyst, benzyltriethylammonium chloride (BTEAC).

The synthesis of dichlorocyclopropane derivatives of 1,7-octadiene by quaternary ammonium salts in a liquid–liquid two-phase medium was carried out in the presence of ultrasonic waves. Kinetics of the reaction is investigated in detail.Figure optionsDownload as PowerPoint slide