Iron-Catalyzed Dearomatization of Biaryl Ynones with Aldehydes via Double C–H Functionalization in Eco-Benign Solvents: Highly Atom-Economical Synthesis of Acylated Spiro[5.5]trienones
作者:Dong Xia、Xin-Fang Duan
DOI:10.1021/acs.joc.1c01870
日期:2021.11.5
bonds of biaryl ynones render the 6-exo-trig regioselective C–H activation dearomatization to spiro[5.5]trienones challenging since the competing reactions of C–H bonds on Ar1 or the ortho-C–H bonds on Ar3 may result in 5-exo-trig cyclization to indenones or 6-exo-trig ortho-dearomatization, respectively. We here report an unprecendented dearomatization of biaryl ynones with aldehydes via double C–H
Regioselectivity‐Switchable Intramolecular Hydroarylation of Ynone
作者:Feng Wu、Shiwei Lu、Shifa Zhu
DOI:10.1002/adsc.202001152
日期:2020.12.22
catalytic approach to the regioselective intramolecular hydroarylation of ynone has been developed. When ZnI2 was used as catalyst, the umpolung α‐arylation of ynone was realized via an addition‐elimination process of iodine ion to generate the ortho‐phenanthrenequinone methide (o‐PQM), which could be trapped by styrene to form benzo[f,h]chromenes through hetero‐Diels‐Alderreaction. While IPrAuCl/AgSbF6
Trifluoromethylthiolative spirocyclization of biaryl ynones without leaving groups on the <i>para</i>-position of dearomatized aryl rings
作者:You Liang、Sijin Wang、Huijuan Jia、Beibei Chen、Feng Zhu、Zhongyang Huo
DOI:10.1039/d2nj01056a
日期:——
efficient strategy for the oxidative spirocyclization of biaryl ynones has been developed, where nonsubstituted groups were on the para-position of the dearomatized aryl rings. This cascade reaction uses the stable and readily available AgSCF3 as a trifluoromethylthio radical precursor and the reaction occurs smoothly in the presence of K2S2O8 and TBHP via a 6-exo-trig radical cyclization, providing a variety
已经开发了一种直接有效的联芳基炔酮氧化螺环化策略,其中未取代的基团位于脱芳基芳环的对位。该级联反应使用稳定且易于获得的 AgSCF 3作为三氟甲硫基自由基前体,在 K 2 S 2 O 8和 TBHP存在下通过6 - exo -trig 自由基环化反应顺利进行,提供多种 SCF 3 -含有高产率的螺[5,5]三烯酮。