作者:Christoph Hirschhäuser、Jeremy S. Parker、Matthew W. D. Perry、Mairi F. Haddow、Timothy Gallagher
DOI:10.1021/ol302176z
日期:2012.9.21
Expedient routes to three classes of novel spiro-fused pyrrolidine, piperidine, and indoline heterocycle scaffolds are described. These three-dimensional frameworks, which conform to the “rule of three”, are suitably protected to allow for site-selective manipulation and functionalization. Different modes of substrate control were explored, which allow for good to excellent levels of diastereoselectivity
描述了三类新型螺-稠合的吡咯烷,哌啶和二氢吲哚杂环骨架的权宜之路。符合“三个规则”的这些三维框架得到了适当的保护,可以进行位点选择操作和功能化。探索了不同的底物控制模式,可以实现良好至极好的非对映选择性,并且无需使用其他手性试剂或催化剂。所开发的概念适用于(±)-coerulescine和(±)-horsfiline的简短正式合成。