作者:Paul R. McGonigal、Claudia de León、Yahui Wang、Anna Homs、César R. Solorio-Alvarado、Antonio M. Echavarren
DOI:10.1002/anie.201207682
日期:2012.12.21
comparison with the shape‐shifting barbaralyl cation, which exists as a mixture of 181 400 degenerate forms. Gold‐catalyzed cycloisomerizations of 7‐alkynyl cyclohepta‐1,3,5‐trienes were found to proceed via fluxional barbaralyl intermediates (see scheme). The evolution of the intermediates into 1‐ or 2‐substituted indenes could be controlled by the choice of gold complex.
与具有两种身份的青蛙王子相比,异形的野蛮人阳离子以181400个简并形式的混合物形式存在,因此显得苍白。发现金催化的7-炔基环庚-1,3,5-三烯的环异构化是通过助熔的barbaralyl中间体进行的(参见方案)。可以通过选择金络合物来控制中间体向1或2取代的茚基的演化。