It was investigated that the reaction of 4,4′-diphenylmethanediamine(MDA)with CO2 and bromoethane to synthesize diethyl 4,4′-diphenylmethanedicarbamate(MDC)under the catalysis of Cs2CO3 cooperating with DBU in super...It was investigated that the reaction of 4,4′-diphenylmethanediamine(MDA)with CO2 and bromoethane to synthesize diethyl 4,4′-diphenylmethanedicarbamate(MDC)under the catalysis of Cs2CO3 cooperating with DBU in supercritical carbon dioixide.The optimum reaction conditions were MDA(10mmol),EtBr(30mmol),Cs2CO3(6mmol)as catalyst cooperating with DBU(30mmol),a temperature of 60 °C,a pressure of 8 MPa,and a reaction time of 4 hours.MDC was obtained in the yield of 88% under the optimum reaction condtions.展开更多
水菖蒲(Acorus calamus L.)超临界CO2萃取物对德国小蠊Blattella germanica L.同时具有很好的触杀和驱避活性。采用药膜接触法和滤纸药膜选择法,分别研究水菖蒲超临界CO2萃取物对德国小蠊3龄若虫的触杀和驱避活性。结果表明:水菖蒲超临...水菖蒲(Acorus calamus L.)超临界CO2萃取物对德国小蠊Blattella germanica L.同时具有很好的触杀和驱避活性。采用药膜接触法和滤纸药膜选择法,分别研究水菖蒲超临界CO2萃取物对德国小蠊3龄若虫的触杀和驱避活性。结果表明:水菖蒲超临界CO2萃取物对德国小蠊的生物活性存在着明显的浓度-时间-效应。触杀作用中处理试虫12h后,最高浓度124.00μg/cm2的校正死亡率就达到98.33%,24h后达到100%。试虫在处理12h后的LC50为36.45μg/cm2。驱避活性中,最高浓度815.28μg/cm2的驱避率为67.73%,驱避等级达到了Ⅳ级。展开更多
文摘It was investigated that the reaction of 4,4′-diphenylmethanediamine(MDA)with CO2 and bromoethane to synthesize diethyl 4,4′-diphenylmethanedicarbamate(MDC)under the catalysis of Cs2CO3 cooperating with DBU in supercritical carbon dioixide.The optimum reaction conditions were MDA(10mmol),EtBr(30mmol),Cs2CO3(6mmol)as catalyst cooperating with DBU(30mmol),a temperature of 60 °C,a pressure of 8 MPa,and a reaction time of 4 hours.MDC was obtained in the yield of 88% under the optimum reaction condtions.
文摘水菖蒲(Acorus calamus L.)超临界CO2萃取物对德国小蠊Blattella germanica L.同时具有很好的触杀和驱避活性。采用药膜接触法和滤纸药膜选择法,分别研究水菖蒲超临界CO2萃取物对德国小蠊3龄若虫的触杀和驱避活性。结果表明:水菖蒲超临界CO2萃取物对德国小蠊的生物活性存在着明显的浓度-时间-效应。触杀作用中处理试虫12h后,最高浓度124.00μg/cm2的校正死亡率就达到98.33%,24h后达到100%。试虫在处理12h后的LC50为36.45μg/cm2。驱避活性中,最高浓度815.28μg/cm2的驱避率为67.73%,驱避等级达到了Ⅳ级。
