Enantioselective ProPhenol-Catalyzed Addition of 1,3-Diynes to Aldehydes to Generate Synthetically Versatile Building Blocks and Diyne Natural Products
作者:Barry M. Trost、Vincent S. Chan、Daisuke Yamamoto
DOI:10.1021/ja910656b
日期:2010.4.14
and saturated aldehydes, of which the latter were previously limited in alkynyl zinc additions. The chiral diynol products are also versatile building blocks that can be readily elaborated; this was illustrated through highly selective trans-hydrosilylations, which enabled the synthesis of a beta-hydroxyketone and enyne. Additionally, the development of this method allowed for the rapid total syntheses
Synthesis and Biological Evaluation of Falcarinol-Type Analogues as Potential Calcium Channel Blockers
作者:Yang Li、Wan-Li Tan、Kai Guo、Xiao-Wei Gao、Jun Wei、Dong Yi、Chun Zhang、Qin Wang
DOI:10.1021/acs.jnatprod.1c00136
日期:2021.8.27
channel-blocking activity, as recorded using a manual patch clamp technique on HEK-293 cells stably expressing hCav1.2 (α1C/β2a/α2δ1). These findings suggest that the mechanism of the L-type calcium channel-blocking activity of falcarinol (1a) and its analogue (R)-2i might be involved in neuroprotection by falcarinol-type analogues by inhibiting calcium overload in the upstream of the signaling pathway.
使用基于手性 1,1'-联萘-2-醇 (BINOL) 的催化系统合成了一系列镰刀菌醇类似物 ( 2 )的对映异构体。研究了镰刀菌素 ( 1a ) 及其类似物 ( 2 ) 对叠氮化钠 (NaN 3 )损伤的 PC12 细胞的神经保护作用。研究了结构-功能关系和可能的机制。在加入 NaN 3并在 CO 2 中培养后,用镰刀菌素类似物 ( R )- 2d和 ( R )- 2i预处理 PC12 细胞1 小时培养 24 小时导致细胞活力显着提高,如 CCK-8 测定和 Hoechst 染色所确定,与 LDH 释放和 MDA 含量减少、SOD 活性增加和 ROS 应激降低相比,与天然镰刀菌素 ( 1a )。这些观察结果表明,镰刀菌素类似物 ( R )- 2d和 ( R )- 2i可以通过增加对氧化应激的抵抗力来保护 PC12 细胞免受 NaN 3诱导的细胞凋亡。第一次,falcarinol ( 1a )