作者:Nilesh Kumar、Masatoshi Kiuchi、John A. Tallarico、Stuart L. Schreiber
DOI:10.1021/ol0504345
日期:2005.6.1
We describe a short synthetic sequence resulting in > 4000 skeletally diverse small molecules that have three distinct skeletal frameworks among other unique structural features. The sequence entails skeletal transformations pioneered by Winterfeldt and co-workers. We use epoxide ring openings and subsequent functionalizations that provide, e.g., spirocycfic oxazoliclines, Lewis acid catalyzed Diels-Alder reactions of a steroid-derived diene that afford stable and isolable ring B adducts, and subsequent retro-Diels-Aider fragmentations that yield 14-membered paracyclophanes.