Chemical Transformation of Terpenoids. IX. Ionophoretic Activities of Macrocyclic Lactone Epoxides Synthesized from E,E-Farnesol.
作者:Hirotaka SHIBUYA、Kazuyoshi OHASHI、Norihiko NARITA、Kazuyuki HORI、Hiroyuki KAWANISHI、Toshimasa ISHIDA、Isao KITAGAWA
DOI:10.1248/cpb.41.2113
日期:——
Two diastereomeric macrocyclic lactone epoxides, i.e., a 13-membered-ring monomeric lactone diepoxide (FL1, E2, 7) and a 26-membered-ring dimeric lactone tetraepoxide (FL2E4, 8), were synthesized from E, E-farnesol by employing a new lactonization reaction with sodium hydride. Examinations by using a W-07 apparatus (liquid-membrane type) and by means of the human erythrocyte membrane method, have shown that FL2E4 (8) exhibits not only ion-transport activity for K+ ion but also ion-permeation activity for K+ ion across the human erythrocyte membrane, while FL1E2 (7) decreases the Na+ ion concentration inside human erythrocytes. Furthermore, we studied the dependence of the ionophoretic activities for K+ ion upon the epoxide configurations by using six distereomers of FL2E4 (8).
合成了两种反式异构体的大环内酯环氧化物,即一个13元环单体内酯二环氧化物(FL1, E2, 7)和一个26元环二聚内酯四环氧化物(FL2E4, 8),它们是通过使用氢化钠进行的新内酯化反应从E,E-法尼醇合成的。通过使用W-07装置(液体膜类型)以及人红细胞膜法进行的检测表明,FL2E4(8)不仅表现出对K+离子的离子运输活性,还能够穿透人红细胞膜对K+离子进行渗透,而FL1E2(7)则降低了人红细胞内Na+离子的浓度。此外,我们还研究了FL2E4(8)的六种反式异构体对K+离子的离子载体活性的依赖性。