申请人:Chauhan R. Kamlesh
公开号:US20060121134A1
公开(公告)日:2006-06-08
A method of separating ZE-nepetalactone and EZ-nepetalactone from catnip oil involving mixing catnip oil dissolved in at least one water immiscible, non-halogenated organic solvent with at least one inorganic base dissolved in water to form a biphasic mixture, stirring the biphasic mixture to hydrolyze ZE-nepetalactone to form ZE-nepetalic acid, separating the aqueous phase containing ZE-nepetalic acid from the organic phase containing EZ-nepetalactone in the biphasic mixture, and optionally acidifying the aqueous phase to about pH 4.5 and adding at least one water immiscible, non-halogenated organic solvent to azeotropically lactonize the ZE-nepetalic acid in the presence of a catalytic amount of p-toluene sulfonic acid to form ZE-nepetalactone.
一种从猫薄荷油中分离ZE-尼泊酮和EZ-尼泊酮的方法,涉及将溶解在至少一种不与水混溶的非卤代有机溶剂中的猫薄荷油与至少一种溶解在水中的无机碱混合,形成两相混合物,搅拌两相混合物以水解ZE-尼泊酮形成ZE-尼泊酸,从两相混合物中分离含有ZE-尼泊酸的水相和含有EZ-尼泊酮的有机相,可选地将水相酸化至约pH 4.5,并添加至少一种不与水混溶的非卤代有机溶剂,在对甲苯磺酸的催化作用下,使ZE-尼泊酸发生共沸烯酮化反应形成ZE-尼泊酮。