作者:Gustav Dickmeiss、Vincenzo De Sio、Jonas Udmark、Thomas B. Poulsen、Vanesa Marcos、Karl Anker Jørgensen
DOI:10.1002/anie.200903253
日期:2009.8.24
A ticket to total synthesis: The title reaction of meso cyclopropane cyclopentanones and epoxycyclopentanones was catalyzed by thiourea‐containing cinchona alkaloids with good to excellent enantioselectivity (see scheme). The concept was extended to a one‐pot asymmetric desymmetrization–fragmentation–Michael addition by including a nucleophile. A kinetic resolution based on this method was also demonstrated
全面合成的第一步:中 环环丙烷环戊酮和环氧环戊酮的标题反应是通过具有硫脲的金鸡纳生物碱催化的,该生物碱具有良好或优异的对映选择性(参见方案)。通过包含亲核试剂,该概念扩展到单锅不对称去对称化-片段化-迈克尔加成。还证明了基于该方法的动力学拆分。