Divergent Syntheses of Spiroindanones and 2-Substituted 1-Indanones by Ruthenium-Catalyzed Tandem Coupling and Cyclization of Aromatic Acids with α,β-Unsaturated Ketones
作者:Jia-Ni Wang、Si-Qi Chen、Zhong-Wen Liu、Xian-Ying Shi
DOI:10.1021/acs.joc.8b02820
日期:2019.2.1
The one-step strategy for the facile syntheses of structurally diverse 1-indanones in moderate to good isolated yields was developed via a ruthenium-catalyzed tandem coupling and cyclization of simple aromatic acids with α,β-unsaturated ketones. The tandem cyclization involves one-pot sequential reactions of C–H activation, conjugate addition, Dieckmann condensation, Michael addition, intramolecular
通过钌催化的串联偶联和简单的芳香酸与α,β-不饱和酮的环化反应,开发了一种以中等到良好的分离产率轻松合成结构多样的1-茚满酮的一步策略。串联环化反应涉及C–H活化,共轭加成,狄克曼缩合,迈克尔加成,分子内Aldol反应或水解的一锅顺序反应。锰添加剂和H 2可以实现螺环茚满酮和2取代的1-茚满酮的可切换访问发现O. Mn(II)添加剂在该转化中起重要作用,微量的水可促进2-取代的1-茚满酮的形成。此过程的特点是一锅式高效构建多个C–C键,高阶经济性,可商购的起始材料以及广泛的底物范围。