Sulfonamide-Directed Chemo- and Site-Selective Oxidative Halogenation/Amination Using Halogenating Reagents Generated in Situ from Cyclic Diacyl Peroxides
作者:Denghu Chang、Rong Zhao、Congyin Wei、Yuan Yao、Yang Liu、Lei Shi
DOI:10.1021/acs.joc.8b00243
日期:2018.3.16
The combination of cyclicdiacylperoxides with commercially available halide salts as a unique halogenating system is utilized in Hofmann–Löffler–Freytag-type reaction. This strategy allows for the formation of N-chloroamides, δ-brominated products, and even biologically relevant pyrrolidines under mild conditions in moderate to excellent yields. Meanwhile, the preliminary structure of the in situ
Delineation of the Critical Parameters of Salt Catalysts in the N
<i>‐</i>
Formylation of Amines with CO
<sub>2</sub>
作者:Martin Hulla、Daniel Ortiz、Sergey Katsyuba、Dmitry Vasilyev、Paul J. Dyson
DOI:10.1002/chem.201901686
日期:2019.8.22
N-formylation of amines combining CO2 as a C1 source with a hydrosilane reducing agent is a convenient route for the synthesis of N-formylated compounds. A large number of salts including ionicliquids (ILs) have been shown to efficiently catalyze the reaction and, yet, the key features of the catalyst remain unclear and the best salt catalysts for the reaction remain unknown. Here we demonstrate the