of the N(1)-phenyl group. Racemic 1-phenyl-6-aminouracils were first separated by chiral HPLC or converting them to the corresponding diastereomers using a chiral resolving agent. We then determined the rotational barrier of each atropisomer by a thermalracemization method and found that these compounds have rotational barriers similar to other C–N axially chiral biaryls. In addition, there was a
Regioselective <i>ortho</i> halogenation of <i>N</i>-aryl amides and ureas <i>via</i> oxidative halodeboronation: harnessing boron reactivity for efficient C–halogen bond installation
作者:Ganesh H. Shinde、Ganesh S. Ghotekar、Francoise M. Amombo Noa、Lars Öhrström、Per-Ola Norrby、Henrik Sundén
DOI:10.1039/d3sc04628a
日期:——
ortho position of N-aryl amides and ureas represents a tool to prepare motifs that are ubiquitous in biologically active compounds. To construct such prevalent bonds, most methods require the use of precious metals and a multistep process. Here we report a novel protocol for the long-standing challenge of regioselective ortho halogenation of N-aryl amides and ureas using an oxidative halodeboronation