Expeditious Synthesis of 2-Aryl Substituted Imidazolines and Imidazoles
摘要:
A versatile and efficient method for the synthesis of 2-aryl substituted imidazolines and imidazoles bearing a carboxylate group on C-4 is reported. Three different synthetic pathways were explored, compared and optimized. The selected procedure involves condensation of methyl 2,3-diaminopropionate with different imino ethers. The ring closure, monitored by LC-MS analysis, was facilitated by heating at reflux in ethanol leading to increase the rate of cyclization.
Manganese‐Catalyzed Hydrogenative Desulfurization of Thioamides
作者:Zelong Wang、Silin Chen、Chao Chen、Yunhui Yang、Congyang Wang
DOI:10.1002/anie.202215963
日期:2023.2
The first manganese-catalyzed hydrogenative desulfurization of thioamides was developed to selectively cleave the C=S bond. Remarkably, functional groups such as aldehyde, ketone, sulfone, or even nitro could be unprecedentedly tolerated in this manganese-based protocol and this, despite their sensitivity to reductive conditions.