RCM for the Construction of Novel Steroid-like Polycyclic Systems. 1. Studies on the Synthesis of a PreD<sub>3</sub>-D<sub>3</sub> Transition State Analogue
作者:Rebeca García-Fandiño、María José Aldegunde、Eva M. Codesido、Luis Castedo、Juan R. Granja
DOI:10.1021/jo050568w
日期:2005.10.1
systems containing eight-membered carbocycles constitute a large class of compounds of importance in organic chemistry, biology, and medicine. Here we describe a new strategy by which complex polycyclic steroid-like systems can be constructed on the steroid CD framework, by a combination of RCM and Heck cyclizations. The method is exemplified by its application to the stereoselective synthesis of 6-8-6
包含八元碳环的天然和非天然多环体系构成了一类在有机化学,生物学和医学中具有重要意义的化合物。在这里,我们描述了一种新的策略,通过该策略,可以通过结合RCM和Heck环化作用,在类固醇CD骨架上构建复杂的多环类固醇样系统。该方法以其在6-8-6稠合碳环系统的立体选择性合成中的应用为例,该系统模拟了原维生素D 3向维生素D 3异构化的假定过渡结构。