申请人:Giraudi Lisa
公开号:US20050038269A1
公开(公告)日:2005-02-17
The present invention is concerned with a novel process for the manufacture of tocol, tocol derivatives and tocopherols, especially α-tocopherol, by the reaction of a hydroquinone featuring 0 to 3 methyl groups, especially 2,3,5-trimethylhydroquinone, with isophytol, phytol or a(n) (iso)phytol derivative, most preferably with isophytol, in the presence of gadolinium trifluoromethanesulfonate, Gd(OSO
2
CF
3
)
3
, as the catalyst in a biphasic solvent system. This biphasic solvent system consists essentially of a polar organic solvent and a non-polar organic solvent. The polar organic solvent is preferably ethylene carbonate and/or propylene carbonate. The non-polar solvent is preferably at least a solvent selected from the group consisting of hexane, heptane, octane, cyclohexane and methylcyclohexane.
本发明涉及一种新型制备生育酚、生育酚衍生物和生育醇,尤其是α-生育醇的方法,通过在双相溶剂体系中,在咔啉醇特别是2,3,5-三甲基咔啉醇和异咔啉醇或(异)咔啉醇衍生物存在下,以三氟甲磺酸钆(Gd(OSO2CF3)3)作为催化剂,反应制得。该双相溶剂体系主要由极性有机溶剂和非极性有机溶剂组成。所述极性有机溶剂优选为乙烯碳酸酯和/或丙烯酸酯。非极性溶剂优选为至少一种溶剂,所述溶剂选自己己烷、庚烷、辛烷、环己烷和甲基环己烷。