Isolation, Structure Elucidation, Semi-Synthesis, and Structural Modification of C<sub>19</sub>-Diterpenoid Alkaloids from <i>Aconitum apetalum</i> and Their Neuroprotective Activities
作者:Lin-Xi Wan、Ji-Fa Zhang、Yong-Qi Zhen、Lan Zhang、Xiaohuan Li、Feng Gao、Xian-Li Zhou
DOI:10.1021/acs.jnatprod.0c01111
日期:2021.4.23
Five new aconitine-type C19-diterpenoid alkaloids, apetalrines A–E (1–5), were isolated from Aconitum apetalum. Their structures were determined by analysis of 1D and 2D NMR, IR, and HRESIMS data. Semisynthesis of apetalrine B (2) from its parent compound aconorine was achieved to confirm the structure proposed. Twenty derivatives of 2 (11a–11l, 12a, 12b, 12d, 12e, 12j, 12k, 12m, 12n) were synthesized
五个新的乌头碱型μc 19种-diterpenoid生物碱,apetalrines A-E(1 - 5)中,从分离乌头apetalum。它们的结构是通过分析 1D 和 2D NMR、IR 和 HRESIMS 数据确定的。apetalrine B ( 2 ) 从其母体化合物乌头碱的半合成被实现以证实所提出的结构。二十衍生物2(11A - 11升,12A,12B,12D,12E,12J,12K,12米,12n的) 是通过依赖简单偶联反应的统一方法合成的。低细胞毒性化合物( 1 – 5 , 11b , 11c , 11f – 11i , 12a , 12b , 12d , 12e , 12k , 12m , 12n )的神经保护作用评价表明化合物2在2 H 2 O 2 O中表现出良好的神经保护作用- 以 50 μM 的浓度处理 SH-SY5Y 细胞。使用流式细胞术、染色和蛋白质印迹对2 进行的一系列研究