Gold Catalysis: Non-Spirocyclic Intermediates in the Conversion of Furanynes by the Formal Insertion of an Alkyne into an Aryl-Alkyl CC Single Bond
作者:A. Stephen K. Hashmi、Tobias Häffner、Weibo Yang、Sreekumar Pankajakshan、Sascha Schäfer、Lara Schultes、Frank Rominger、Wolfgang Frey
DOI:10.1002/chem.201200306
日期:2012.8.20
It takes al‐kynes: The formation of furyl‐substituted heterocycles from furanynes with donor groups on the furan–alkyne tether and mechanistic control experiments indicate the involvement of open‐chained carbenium ions in the overall insertion of an alkyne into a CC bond, rather than the usual spirocyclic intermediates (see scheme).
需要炔烃:由呋喃酮与呋喃-炔系链上的供体基团形成的呋喃酮取代的杂环和机理控制实验表明,开链碳正离子参与了炔烃整体插入CC键中,而不是通常的螺环中间体(请参阅方案)。