From Central to Axial to Central Chirality: Enantioselective Construction of thetrans-4,5,9,10-Tetrahydroxy-9,10-dihydrophenanthrene System
作者:Georgi Stavrakov、Manfred Keller、Bernhard Breit
DOI:10.1002/ejoc.200700583
日期:2007.12
Enantioselective synthesis of the core trans-4,5,9,10-tetrahydroxy-9,10-dihydrophenanthrene parent system of the antibiotics benanimicin, pradimicin and FD 594 has been accomplished. The synthesis employs a chiral tether approach and makes use of efficient central to axial to central chirality transfer. Key to success was an “imine-directed” atropdiastereoselective Ullmann coupling under mild reaction
已经完成了抗生素贝那霉素、普拉迪霉素和 FD 594 的核心反式-4,5,9,10-四羟基-9,10-二氢菲母体系统的对映选择性合成。该合成采用手性系链方法并利用有效的中心到轴向到中心手性转移。成功的关键是在温和的反应条件下“亚胺导向”的阻滞非对映选择性乌尔曼偶联。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)