Halogen-Bond-Promoted α-C−H Amination of Ethers for the Synthesis of Hemiaminal Ethers
作者:Zhangjin Pan、Zhenwei Fan、Beili Lu、Jiajia Cheng
DOI:10.1002/adsc.201800006
日期:2018.5.2
A simple halogen‐bond‐promoted α‐C−H amination of ether/thioether with a variety of N−H compounds has been accomplished. In the presence of low‐cost and readily available perfluorobutyl iodide, a diverse range of hemiaminal ether derivatives, including the valuable hydrazone hemiaminal ethers, were quickly assembled under thermal or visible‐light irradiation conditions. Mechanistic studies suggest
Transition Metal-Free Intermolecular α-CH Amination of Ethers at Room Temperature
作者:Ivan Buslov、Xile Hu
DOI:10.1002/adsc.201400646
日期:2014.11.3
AbstractWe describe a new method for the intermolecular amination of the α‐CH bonds of ethers. A hypervalent iodine reagent was used as oxidant to enable the amination of cyclic and acyclic alkyl ethers with a wide range of amides, imides, and amines. The amination occurred at room temperature and without a transition metal catalyst. The method could be used to synthesize the anti‐cancer prodrug Tegafur and its analogues.magnified image
Inter- and Intramolecular Addition/Cyclizations of Sulfonamide Anions with Alkynyliodonium Triflates. Synthesis of Dihydropyrrole, Pyrrole, Indole, and Tosylenamide Heterocycles
作者:Ken S. Feldman、Michelle M. Bruendl、Klaas Schildknegt、Adolph C. Bohnstedt
DOI:10.1021/jo9605814
日期:1996.1.1
The synthesis of dihydropyrroles, pyrroles, and indoles through [3-atom $ 2-atom] combination of ethyl or aryl tosylamide anions with phenyl(propynyl)iodonium triflate, and the base-mediated intramolecular bicyclization of alkynyliodonium-bearing tosylamide or tosylimide substrates to furnish bicyclic and tricyclic tosylenamide (-enimide) products, is described. A detailed discussion of the scope, limitations, byproduct formation, and the basis for observed diastereoselectivity is presented.
Visible-Light-Induced and Iodoform-Promoted Functionalization of Ether with Secondary Sulfonyl Amides