Efficient Preparation of Alkaloids Polycarpine and Polycarpaurines A and C
作者:Pengbin Guo、Shuang Yan、Zeliang Hu、Weihui Zhuang、Yan Xiong、Lanya Zhang、Ziwen Wang、Qingmin Wang
DOI:10.1002/jhet.2549
日期:2017.1
An efficient method for the preparation of alkaloidspolycarpine and polycarpaurines A and C via microwave‐assisted three‐step one‐pot reaction as the key step has been developed. This is the first report about the synthesis of polycarpaurines A and C. Starting from commercially available p‐methoxybenzaldehyde, polycarpine and polycarpaurine A were obtained over seven steps with 40 and 24 % overall
已经开发了一种通过微波辅助三步一锅法反应作为关键步骤制备生物碱多香果碱和多香豆碱A和C的有效方法。这是有关多香豆素A和C合成的第一份报告。从市售对-甲氧基苯甲醛开始,经七个步骤分别获得了多香果素和多香豆素A,总产率分别为40%和24%。Polycarpine可以转换到polycarpaurine下在72%的产率在硫酸氢钠的存在下3。通过1 H NMR,13 C NMR和HRMS证实了多香果素和多香豆素A和C的结构。
Facile synthesis of (2R,3S)-3-(4-Methoxyphenyl)glycidic esters via optical resolution of the unisolated labile free acid
(2R,3S)-3-(4-Methoxyphenyl)glycidic esters were efficiently synthesized by the opticalresolution of the racemic acid and esterification of the opticallyactiveacid thus obtained, in the form of itsalkali metal salt.