The absolute configuration of trilobacin and trilobin, a novel highly potent acetogenin from the stem bark of Asimina triloba (Annonaceae)
作者:Geng-Xian Zhao、Zhe-Ming Gu、Lu Zeng、Jin-Feng Chao、John F. Kozlowski、Karl V. Wood、Jerry L. McLaughlin
DOI:10.1016/0040-4020(95)00364-e
日期:1995.6
Trilobacin (1) is the only previously reported Annonaceous acetogenin with the erythro relative configuration between the adjacent bis-tetrahydrofuran (THF) rings. The relative configuration in the adjacent bis-THF moiety of 1 was corrected to threo/trans/erythro/cis/threo from C-15 to C-24, and the absolute configuration was determined as 4R, 15R, 16R, 19R, 20S, 23R, 24R and 36S by advanced Mosher
Trilobacin(1)是先前报道的唯一的Annnonaceous acetogenin,在相邻的双四氢呋喃(THF)环之间具有赤字的相对构型。将相邻的双THF部分1中的相对构型从C-15改成C-24的苏/反式/赤型/顺式/苏式,并将其绝对构型确定为4 R,15 R,16 R,19 R,20 S,23 R,24 R和36 S通过先进的Mosher酯方法及其4,24-二乙酸(1a)。进一步研究爪足树Asimina triloba的茎皮的EtOH提取物,通过盐水虾的致死性监测其生物活性,从而产生了一种新的产乙酸原素trilobin(2)。光谱和化学方法鉴定2为的4-脱氧-10-羟基异构体1。通过分析其Mosher酯衍生物,确定2的绝对构型为10 R,15 R,16 R,19 R,20 S,23 R,24 R和36 S。2个 在三种人实体瘤细胞系中具有选择性的细胞毒性,其作用力超过阿霉素的十亿倍。