A Substrate-Based Approach to Skeletal Diversity from Dicobalt Hexacarbonyl (<i>C</i>1)-Alkynyl Glycals by Exploiting Its Combined Ferrier-Nicholas Reactivity
作者:Fernando Lobo、Ana M. Gómez、Silvia Miranda、J. Cristóbal López
DOI:10.1002/chem.201402149
日期:2014.8.11
combine dicobalt hexacarbonyl propargyl (Nicholas) and pyranose‐derived allylic (Ferrier) cations have been generated by treatment of hexacarbonyldicobalt (C‐1)‐alkynyl glycals with BF3.Et2O. The study of these cations has resulted in the discovery of novel reaction pathways that have shown to be associated to the nature of O‐6 substituent in the starting alkynyl glycals. Accordingly, compounds resulting
通过用BF 3处理六羰基二钴(C -1)-炔基糖,已经产生了将二钴二羰六羰基炔丙基(Nicholas)和吡喃糖衍生的烯丙基(Ferrier)阳离子结合起来的新型底物。等2这些阳离子的O的研究已经导致在已经示出为被关联到的性质的新的反应途径的发现Ó -6在原料炔基烯糖取代基。相应地,通过亲核试剂的掺入,由环膨胀(氧杂环丁烷),环收缩(四氢呋喃)或支链吡喃酶产生的化合物可以分别从6- O-苄基,6-羟基或6- O-甲硅烷基衍生物获得。使用6‐ O烯丙基炔基糖可以生成合适的官能化氧杂环丁烷,能够经历分子内Pauson-Khand环化作用,从而生成单个三环衍生物。