作者:Nobuhiro Hirai、Sou-ichi Sakashita、Tadachika Sano、Toshiki Inoue、Hajime Ohigashi、Cha-um Premasthira、Yukio Asakawa、Jiro Harada、Yoshiharu Fujii
DOI:10.1016/s0031-9422(00)00264-8
日期:2000.9
epi-zeylanoxide A, zeylanoxide B and epi-zeylanoxide B, respectively. The absolute configurations at C-3 and C-4 were elucidated by chemical synthesis of both enantiomers from L- and D-glucose. Two of the inhibitors were secologanic acid and secologanoside. and three other inhibitors were by known secoiridoid glucosides formed as artifacts during extraction with methanol. The cyclic thiosulfinates and secoiridoid
从热带杂草 Sphenoclea zeylanica 中分离出九种植物生长抑制剂,其具有化感作用。迄今为止尚未从任何植物来源报道的那些化合物是环状硫代亚磺酸盐的异构体,(1S,3R,4R)-(+)-和(1R,3R,4R)-(+)-4-羟基-3-羟甲基-1 ,2-二硫戊环-1-氧化物、(2R,3R,4R)-(-)-和(2S,3R,4R)-(+)-4-羟基-3-羟甲基-1,2-二硫戊环-2 -氧化物。它们分别被命名为 zeylanoxy A、epi-zeylan 海事 A、zeylan 海事 B 和 epi-zeylan 海事 B。通过化学合成 L- 和 D- 葡萄糖的两种对映体,阐明了 C-3 和 C-4 的绝对构型。其中两种抑制剂是secologanic 酸和secologanoside。和其他三种抑制剂是由已知的环烯醚萜苷在甲醇提取过程中作为伪影形成的。环状硫代亚磺酸盐和环烯醚萜苷在3.0