Synthesis, optical resolution, absolute configuration, and osteogenic activity of cis-pterocarpans
作者:Atul Goel、Amit Kumar、Yasmin Hemberger、Ashutosh Raghuvanshi、Ram Jeet、Govind Tiwari、Michael Knauer、Jyoti Kureel、Anuj K. Singh、Abnish Gautam、Ritu Trivedi、Divya Singh、Gerhard Bringmann
DOI:10.1039/c2ob25722j
日期:——
convenient synthesis of natural and synthetic pterocarpans was achieved in three steps. Optical resolution of the respective enantiomers was accomplished by analytical and semi-preparative HPLC on a chiral stationary phase. For medicarpin and its synthetic derivative 9-demethoxymedicarpin, the absolute configuration was confirmed by a combination of experimental LC-ECD coupling and quantum-chemical ECD
通过三个步骤即可轻松合成天然和合成的罗汉松。通过在手性固定相上进行分析和半制备性HPLC来完成各个对映异构体的旋光拆分。对于麦地卡宾及其合成衍生物9-去甲氧基medicarpin,绝对构型已通过实验性LC-ECD耦合和量子化学ECD计算的结合得到证实。(-)-Medicarpin和(-)-9-demethoxymedicarpin都是6a R,11a R-构型,因此相应的对映异构体(+)-medicarpin和(+)-9-demethoxymedicarpin具有6a S,11a S -配置。麦地卡因的骨形成(骨形成)活性的比较机制研究(外消旋与对映体纯净的材料)显示(+)-(6a S,11a S)-medicarpin(6a)显着增加了骨形态发生蛋白2(BMP2)的表达和骨特异性转录因子Runx-2 mRNA的水平,而对于其他对映异构体(-)-(6a R,11a R)-medicarpi