Nucleophilic Substitution of Hydrogen Facilitated by Quinone Methide Moieties in Benzo[<i>cd</i>]azulen-3-ones
作者:Alexandros Kiriazis、Ingo B. Aumüller、Ralica Arnaudova、Vanessa Brito、Tobias Rüffer、Heinrich Lang、Samuel M. Silvestre、Päivi J. Koskinen、Jari Yli-Kauhaluoma
DOI:10.1021/acs.orglett.7b00588
日期:2017.4.21
methide) moieties in benzo[cd]azulen-3-ones account for an easy switch between the bridged 10π- and 6π-aromatic systems in organic synthesis. We report conjugate additions, oxidative nucleophilic substitutions of hydrogen, and reversible Michael additions under very mild conditions. In the presence of thiol nucleophiles, the protonated σH-adducts could be isolated and characterized. The typical preference
苯并[ cd ] azulen-3-ones中内置的o-和p -QM(QM =甲基苯醌)部分,可轻松在有机合成的10π-和6π-芳族桥联系统之间切换。我们报告了共轭加成,氢的氧化亲核取代和在非常温和的条件下可逆的迈克尔加成。在硫醇亲核体的存在下,质子化σ ħ -adducts可以分离并表征。对o-或p -QM部分的典型偏爱导致较高的区域选择性。此外,评估了新型苯并[ cd ] azulenes对人Pim-1激酶的抑制能力。