催化剂对橙花叔醇异构化反应影响的研究

STUDY ON EFFECT OF MULTIPLEX CATALYSTS ON ISOMERIZATION OF NEROLIDOL

钒铝钨酸盐类无机催化剂、原钒酸酯类和原钒酸硅酯类有机催化剂均可对橙花叔醇 的催化异构化反应起作用。研究结果表明,3类催化剂中催化效果较好的分别是偏钒酸铵、 原钒酸丁酯和原钒酸三苯基硅酯,它们作为单一催化剂均可使橙花叔醇发生较好的异构化反 应,金合欢醇的产率分别为37．1％、37．2％和32．O％。在单一催化剂对比研究的基础上,将 偏钒酸铵、原钒酸丁酯和原钒酸三苯基硅酯等3种比较好的催化剂进行了多元复配应用试验,研究结果表明, 这3种催化剂的复配应用虽然可以轻微提高橙花叔醇异构化反应效果,但未表现出明显的增效和协同作用。

Inorganic catalysts of metavanadate, molybdate, and tungstate, organic catalysts of orthovanadates, and organic catalysts of siliconous orthovanadates are all able to catalyze the isomerization of nerolidol. Ammonium metavanadate, triisobutyl orthovanadate and triphenylsiliconic orthovanadate have superior catalytical effects among these three kinds of catalysts. The yield of farnesol in the isomerized mixture from nerolidol is 37. 1%, 37.2 % and 32.0 % respectively, by catalysis of ammonium metavanadate, triisobutyl orthovanadate and triphenylsiliconic orthovanadate respectively. Thereafter, several multiplex catalysts are prepared and tested for the isomerization based on the selected catalysts, namely ammonium metavanadate, triisobutyl orthovanadate and triphenylsiliconic orthovanadate. However, multiplex catalysts could not raise catalytic effect of isomerization as remarkably as predicted.