Abstract
The absolute configuration of physostigmine has been established by correlating the configuration of its C-3a atom with that of the asymmetric carbon atom in (+)-3-ethyl-3-methoxycarbonyl-3-methylpropionic acid. Comparison of the optical rotatory dispersion spectra of physostigmine, Na-norphysostigmine, geneserine, physovenine and eseramine have shown that all five alkaloids have the same absolute configurations.
摘要
通过将physostigmine的C-3a原子的构型与(+)-3-乙基-3-甲氧羰基-3-甲基丙酸的不对称碳原子的构型相对应,已经确定了physostigmine的绝对构型。比较physostigmine、Na-norphysostigmine、generine、physovenine和eseramine的旋光色散光谱表明,这五种生物碱具有相同的绝对构型。