Synthetic method of solid superacid TiSiW 12 O 40 /TiO 2 was described.The synthesis of iso amyl propionate catalyzed by TiSiW 12 O 40 /TiO 2 has been studied and the factors influencing on the yield is discussed.It s...Synthetic method of solid superacid TiSiW 12 O 40 /TiO 2 was described.The synthesis of iso amyl propionate catalyzed by TiSiW 12 O 40 /TiO 2 has been studied and the factors influencing on the yield is discussed.It shows that it’s an excellent catalyst,the yield of the iso amyl propionate can be over 77% when the molar ratio of iso amyl alcohol and propionic acid is 1.2,the quality of TiSiW 12 O 40 /TiO 2 is equal to 1.5% feed stock,the reaction time is 80min and the reaction temperature is about 103～107℃.展开更多
以噻吩、乙酸酐为原料,考察了不同催化剂对噻吩酰基化反应的影响;以中间产物2-乙酰噻吩(Ⅰ)为原料,研究了溶剂、相转移催化剂对中间产物氧化重排反应的影响。实验结果表明:负载型杂多酸H3PW12O40/SiO2为酰基化反应适宜催化剂。在氯仿为...以噻吩、乙酸酐为原料,考察了不同催化剂对噻吩酰基化反应的影响;以中间产物2-乙酰噻吩(Ⅰ)为原料,研究了溶剂、相转移催化剂对中间产物氧化重排反应的影响。实验结果表明:负载型杂多酸H3PW12O40/SiO2为酰基化反应适宜催化剂。在氯仿为溶剂,适量聚乙二醇400作为相转移催化剂时,中间产物2-乙酰噻吩氧化重排生成2-噻吩乙酸甲酯(Ⅱ),(Ⅱ)经水解得产物2-噻吩乙酸(Ⅲ),经重结晶后产物产率可达66.8%。用1 H NMR,IR对产物结构进行了表征。展开更多
文摘Synthetic method of solid superacid TiSiW 12 O 40 /TiO 2 was described.The synthesis of iso amyl propionate catalyzed by TiSiW 12 O 40 /TiO 2 has been studied and the factors influencing on the yield is discussed.It shows that it’s an excellent catalyst,the yield of the iso amyl propionate can be over 77% when the molar ratio of iso amyl alcohol and propionic acid is 1.2,the quality of TiSiW 12 O 40 /TiO 2 is equal to 1.5% feed stock,the reaction time is 80min and the reaction temperature is about 103～107℃.
文摘以噻吩、乙酸酐为原料,考察了不同催化剂对噻吩酰基化反应的影响;以中间产物2-乙酰噻吩(Ⅰ)为原料,研究了溶剂、相转移催化剂对中间产物氧化重排反应的影响。实验结果表明:负载型杂多酸H3PW12O40/SiO2为酰基化反应适宜催化剂。在氯仿为溶剂,适量聚乙二醇400作为相转移催化剂时,中间产物2-乙酰噻吩氧化重排生成2-噻吩乙酸甲酯(Ⅱ),(Ⅱ)经水解得产物2-噻吩乙酸(Ⅲ),经重结晶后产物产率可达66.8%。用1 H NMR,IR对产物结构进行了表征。
