In order to produce versatile and potentially functional terpene-based compounds, a (R)-limonene-derived diol and its corresponding five-membered cyclic carbonate were prepared. The diol (cyclic carbonate) comprises four diastereomers based on the stereochemical configuration of the diol (and cyclic carbonate) moiety. By choosing the appropriate starting compounds (trans- and cis-limonene oxide) and conditions, the desired diastereomers were synthesised in moderate to high yields with, in most cases, high stereoselectivity. Comparison of the NMR data of the obtained diols and carbonates revealed that the four different diastereomers of each compound could be distinguished by reference to their characteristic signals.
为了生产多功能且潜在功能的基于萜烯的化合物,制备了一种(R)-柠檬烯衍生的二醇及其对应的五元环碳酸酯。该二醇(环碳酸酯)根据二醇(和环碳酸酯)基团的立体化学构型包含四个对映异构体。通过选择适当的起始化合物(顺式和反式柠檬烯氧化物)和条件,所需的对映异构体以中等到高收率合成,并且在大多数情况下具有高立体选择性。比较所得二醇和碳酸酯的NMR数据表明,通过参考其特征信号可以区分每种化合物的四种不同对映异构体。