Determination of the Absolute Configuration of Khellactone Esters from <i>Peucedanum japonicum</i> Roots
作者:Min Jee Hong、Jinwoong Kim
DOI:10.1021/acs.jnatprod.6b00947
日期:2017.5.26
angular dihydropyranocoumarins (1–16) and 24 known compounds were isolated from the roots of Peucedanum japonicum Thunb. The absolute configuration of diacylkhellactone was established by partial hydrolysis, the Mosher method, and X-ray crystallography. In addition, ECD spectroscopy was used to assign the absolute configurations of several of the angular dihydropyranocoumarins. Enantiomers were detected
十六新的角dihydropyranocoumarins(1 - 16)和24种已知的化合物,分别从根部分离前胡血吸虫藤。通过部分水解,Mosher法和X射线晶体学分析确定了二乙酰基内酯的绝对构型。此外,ECD光谱用于确定几种角二氢吡喃香豆素的绝对构型。通过使用MTPA酯的RP-HPLC检测对映异构体,而在顺式-单酰基乙内酯中观察到取代基的酰基迁移。