Diastereospecific Gold(I)‐Catalyzed Cyclization Cascade for the Controlled Preparation of N‐ and N,O‐Heterocycles
作者:Michael E. Muratore、Andrey I. Konovalov、Helena Armengol‐Relats、Antonio M. Echavarren
DOI:10.1002/chem.201802770
日期:2018.10.17
The reaction of oxime‐tethered 1,6‐enynes with a cationic gold(I) catalyst demonstrates a great potential for the synthesis of a range of heterocycles in a diastereospecific fashion. The control of the configuration of the oxime and the alkene of the enyne moiety is the key to selectively obtain dihydro‐1,2‐oxazines, isoxazolines or dihydropyrrole‐N‐oxides as single diastereoisomers. As supported by
肟基束缚的1,6-烯炔与阳离子金(I)催化剂的反应表明,以非对映特异性方式合成一系列杂环具有巨大潜力。控制肟和烯炔部分烯烃的构型是选择性地获得作为单一非对映异构体的二氢1,2-恶嗪,异恶唑啉或二氢吡咯-N-氧化物的关键。在DFT计算的支持下,这些级联反应通过将肟的O或N原子分子内加到环丙基金(I)卡宾中间体上而逐步进行。在这项研究中,还观察到了罕见的硝酮[3,3]-σ重排。