Metal-free electrochemical [3 + 2] heteroannulation of anilines with pyridines enabled by dual C–H radical aminations
作者:Mu-Jia Luo、Xuan-Hui Ouyang、Yan-Ping Zhu、Yang Li、Jin-Heng Li
DOI:10.1039/d1gc02922c
日期:——
electrochemical intermolecular [3 + 2] heteroannulation of anilines with electron-deficient pyridines enabled by dual C–H radicalaminations for producing functionally diverse benzo[4,5]imidazo[1,2-a]pyridines is described. The site-selectivity of aminations of aryl C(sp2)–H bonds relies on the electronic effect of two reaction partners: each contributed two reactive sites (a C(sp2)–H bond and a nitrogen
Oxidative Radical-Mediated Addition of Ethers to Quinone Imine Ketals: An Access to Hemiaminals
作者:Satish G. More、Rohit B. Kamble、Gurunath Suryavanshi
DOI:10.1021/acs.joc.0c02254
日期:2021.2.5
synthesis of substituted hemiaminal via addition of ethers to quinone imine ketals (QIKs) has been developed under metal-free conditions. In the presence of tetrabutylammonium chloride and potassium persulfate (K2S2O8), QIKs couple efficiently with cyclic and acyclic ethers to give hemiaminals. This strategy offers an easy access to substituted hemiaminal ethers with high functional group tolerance in good
通过在无金属条件下开发通过将醚添加到醌亚胺缩酮(QIKs)的高度区域选择性合成取代的烟酰胺的方法。在氯化四丁基铵和过硫酸钾(K 2 S 2 O 8)的存在下,QIK与环状和非环状醚有效偶联,得到缩醛。此策略可轻松获得具有高官能团耐受性且产率高至优异的取代的人类薄荷醚。
Highly chemo- and regioselective C–P cross-coupling reaction of quinone imine ketals with Ar<sub>2</sub>P(O)H to construct <i>ortho</i>-amino triarylphosphine derivatives
作者:Teng Liu、Yongqin Li、Feixiang Cheng、Xianfu Shen、Jianjun Liu、Jun Lin
DOI:10.1039/c9gc00989b
日期:——
A highly chemo- and regioselective approach for the construction of ortho-amino triarylphosphine oxides has been achieved through a C–P cross-coupling reaction involving quinoneimineketals (QIKs) with Ar2P(O)H and catalyzed via a Lewis base. This alternative protocol provided a wide substrate scope with excellent yields (82–95%), and a variety of ortho-amino triarylphosphines were obtained with high
Regioselective/electro-oxidative intermolecular [3 + 2] annulation for the preparation of indolines
作者:Qingqing Wang、Pan Wang、Xinlong Gao、Dan Wang、Shengchun Wang、Xingan Liang、Liwei Wang、Heng Zhang、Aiwen Lei
DOI:10.1039/c9sc05729c
日期:——
amines or vinyl anilines for the preparation of pyrrolidines or indolines, the intermolecular version is less studied. Herein, this electrochemical intermolecular oxidative annulation of anilines and alkenes for the preparation of indolines proceeded under external oxidant-free conditions. The most noteworthy achievement of our work is the facile generation of indolines with quaternary centers at the