The complex of Bis(2,4 pentanedionato) Cobalt has been synthesized.The structure has been characterized by infrared spectra and element analysis.The catalytic activity of the complex in the cyclohexene allylic oxidati...The complex of Bis(2,4 pentanedionato) Cobalt has been synthesized.The structure has been characterized by infrared spectra and element analysis.The catalytic activity of the complex in the cyclohexene allylic oxidation by oxygen molecule has been studied.The influences of reaction temperature,time,solvents and additives on the oxidation have been determined.The results show that when the oxidation is carried out under the reaction conditions of 70～80℃,4～10h and 2.0Mpa/O 2,the main product is cyclohexene 2 one.The conversion of cyclohexene increases with the rise of the reaction temperature,time and polarity of solvent.Some additives,such as imidazole,could improve the selectivity of cyclohexene 2 one.展开更多
以雄烯二酮为原料,经3,17位亚乙二氧基化,7位烯丙位氧化合成了目标化合物3,3,17,17-亚乙二氧基-7-羰基-雄烯二酮,总收率为45.2%。目标化合物和中间体的结构经IR,1 H NMR和MS确证。3,3,17,17-亚乙二氧基-7-羰基-雄烯二酮烯丙位氧化的最...以雄烯二酮为原料,经3,17位亚乙二氧基化,7位烯丙位氧化合成了目标化合物3,3,17,17-亚乙二氧基-7-羰基-雄烯二酮,总收率为45.2%。目标化合物和中间体的结构经IR,1 H NMR和MS确证。3,3,17,17-亚乙二氧基-7-羰基-雄烯二酮烯丙位氧化的最佳合成条件如下:n(PDC)∶n(t-BuOOH)∶n(3,3,17,17-亚乙二氧基-雄烯二酮)=4∶4∶1,反应温度为25℃,反应时间为5h。此合成方法反应原料易得,反应条件温和且产率高。展开更多
文摘The complex of Bis(2,4 pentanedionato) Cobalt has been synthesized.The structure has been characterized by infrared spectra and element analysis.The catalytic activity of the complex in the cyclohexene allylic oxidation by oxygen molecule has been studied.The influences of reaction temperature,time,solvents and additives on the oxidation have been determined.The results show that when the oxidation is carried out under the reaction conditions of 70～80℃,4～10h and 2.0Mpa/O 2,the main product is cyclohexene 2 one.The conversion of cyclohexene increases with the rise of the reaction temperature,time and polarity of solvent.Some additives,such as imidazole,could improve the selectivity of cyclohexene 2 one.
文摘以雄烯二酮为原料,经3,17位亚乙二氧基化,7位烯丙位氧化合成了目标化合物3,3,17,17-亚乙二氧基-7-羰基-雄烯二酮,总收率为45.2%。目标化合物和中间体的结构经IR,1 H NMR和MS确证。3,3,17,17-亚乙二氧基-7-羰基-雄烯二酮烯丙位氧化的最佳合成条件如下:n(PDC)∶n(t-BuOOH)∶n(3,3,17,17-亚乙二氧基-雄烯二酮)=4∶4∶1,反应温度为25℃,反应时间为5h。此合成方法反应原料易得,反应条件温和且产率高。
