Superacid-Mediated Intramolecular Cyclization/Condensation: Facile One-Pot Synthesis of Spirotetracyclic Indanones and Indenes
作者:Gedu Satyanarayana、Bokka Ramulu、Devarapalli Kumar
DOI:10.1055/s-0036-1590816
日期:2017.10
A facile, superacid-promoted, domino, one-pot synthesis of novel spirotetracyclic indanones through intramolecular Friedel–Crafts acylation/alkylation of α,β-unsaturated cinnamic acid esters is presented. Interestingly, when the β-aryl group contained electron-withdrawing substituents such as fluoro, chloro, or bromo, the reaction took a different mechanistic path and afforded arylindenes as the end
介绍了一种通过 α,β-不饱和肉桂酸酯的分子内 Friedel-Crafts 酰化/烷基化,简便、超强酸促进、多米诺、一锅法合成新型螺四环茚满酮的方法。有趣的是,当 β-芳基含有吸电子取代基如氟、氯或溴时,反应采取不同的机理路径并提供亚芳基作为最终产物。