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。
Transition-Metal-Free Regioselective One-Pot Synthesis of Aryl Sulfones from Sodium Sulfinates via Quinone Imine Ketal
作者:Priyanka Halder、Vivek T. Humne、Santosh B. Mhaske
DOI:10.1021/acs.joc.8b02835
日期:2019.2.1
regioselective transition-metal-free one-pot synthesis of arylsulfones via the reactive quinone imine ketal intermediate is demonstrated using easily accessible bench-stable sulfinate salts. A broad range of functionality on p-anisidine substrates as well as sulfinate salts was tolerated under mild reaction conditions to provide the corresponding arylsulfones in good to excellent yields.
An unprecedented [3 + 2]-annulation of prop-2-ynylsulfonium salts and p-quinamines was developed, affording a series of hydroindol-5-ones with a methylthio group in moderate to good yields under mild conditions. In this reaction, the prop-2-ynylsulfonium salt acts as a novel C2 synthon and sulfide does not serve as a leaving group, which provides facile access to organosulfur compouds.