Three [2,3]Wittig-based approaches for stereocontrol over three contiguous chiral centers are described within the synthesis of the title lactone. In these methods, the erythro-selective [2,3]Wittig variants are combined with one of the stereoselective processes: the Michael addition, the radical cyclization, and the hydroboration.
在合成标题内酯的过程中,介绍了三种基于[2,3]Wittig 的方法,用于对三个连续手性中心进行立体控制。在这些方法中,红选择性 [2,3]Wittig 变体与迈克尔加成、自由基环化和氢
硼化合成的立体选择性过程之一相结合。