A CHIRAL RESOLUTION METHOD MIMICKING MAGNETIC BENEFICIATION AND THE MAGNETIC NANO-INHIBITORS FOR SELECTIVE ENRICHMENT
申请人:PEKING UNIVERSITY
公开号:US20210163695A1
公开(公告)日:2021-06-03
A core-shell nanocomposite is formed by co-assembly of an amphiphilic polymer and hydrophobically modified magnetic nanoparticles, with its core being a hydrophobically modified magnetic nanomaterial and its shell being the amphiphilic polymer, wherein hydrophilic segments in the amphiphilic polymer are located at an outermost layer of the shell. The above composite can be used as additives in the crystallization of conglomerates and obtain optically pure crystals of both enantiomers in a single process. The key thereof is that the composite is used to enrich molecules with the same configuration while inhibit the crystallization of the other enantiomer in a supersaturated solution of conglomerates, such that a non-magnetic crystal and a magnetic crystal (which are enantiomers of each other) are generated in a unit operation. Optically pure crystals of both enantiomers with over 90 ee % can be obtained by one-time crystallization, and the total yield can be as high as 40%.
Resolution of conglomerates with the assistance of tailor-made impurities. Generality and mechanistic aspects of the "rule of reversal". A new method for assignment of absolute configuration
Self‐Reporting Inhibitors: A Single Crystallization Process To Obtain Two Optically Pure Enantiomers
作者:Xichong Ye、Jiaxi Cui、Bowen Li、Na Li、Jie Zhang、Xinhua Wan
DOI:10.1002/anie.201803480
日期:2018.7.2
process can significantly increase the chiral separation efficiency but this is difficult to realize. Now a self‐reporting strategy is presented for visualizing the crystallization process by a dyed self‐assembled inhibitor made from the copolymers with tri(ethyleneglycol)‐grafting polymethylsiloxane as the main chain and poly(N6‐methacryloyl‐l‐lysine) as sidechains. When applied with seeds together for
在单个结晶过程中收集两种光学纯的对映异构体可以显着提高手性分离效率,但这很难实现。现在提出了一种自报告策略,以可视化一种染色的自组装抑制剂的结晶过程,该抑制剂是由三(乙二醇)接枝聚甲基硅氧烷作为主链,聚(N 6-甲基丙烯酰基-l-赖氨酸)作为共聚物的共聚物制成的。侧链。当与种子一起施用以进行团块的分级结晶时,抑制剂可以标记二级晶体的形成,并指导两种对映异构体的完全分离过程,其中无色晶体为第一产物,红色晶体为第二产物。该方法导致d的高光学纯度/ l -Asn·H 2 O(在一次结晶过程中,d晶体的ee为99.9%,l晶体的为99.5 %ee )。它需要少量的添加剂,并具有出色的可回收性。