Synthesis of Functionalized 1<i>H</i>-Indenes and Benzofulvenes through Iodocyclization of <i>o</i>-(Alkynyl)styrenes
作者:Patricia García-García、Ana M. Sanjuán、Muhammad A. Rashid、Alberto Martínez-Cuezva、Manuel A. Fernández-Rodríguez、Félix Rodríguez、Roberto Sanz
DOI:10.1021/acs.joc.6b02788
日期:2017.1.20
reaction conditions. In addition, related alkoxyiodocyclization processes are described, which are particularly interesting in their intramolecular version because they allow the synthesis of heteropolycyclic structures containing the indene core. Finally, the usefulness of the prepared 3-iodoindenes has been demonstrated by the synthesis of several polysubstituted indene derivatives through conventional
已经开发了一种方便的方法来制备合成上有用的3-碘茚衍生物。该协议基于邻-(炔基)苯乙烯的5-内碘代环化反应,代表了使用烯烃作为亲核对应物进行卤代环化的稀有例子之一,并允许合成3- iodo -1 H-茚(由β-烷基-β-烷基/芳基-邻-(炔基)苯乙烯)和3-碘苯并富烯基(来自β,β-二芳基-o-(炔基)苯乙烯)在温和的反应条件下收率很高。另外,描述了相关的烷氧基碘代环化方法,其在分子内形式中特别令人感兴趣,因为它们允许合成包含茚核的杂多环结构。最后,通过常规的钯催化的交叉偶联反应和碘-锂交换过程,合成了几种多取代的茚衍生物,证明了所制备的3-碘茚的有用性。