Enantioselective synthesis of cyclic and linear diamines by imine cycloadditions
作者:Tsung‐Che Chang、Ambara R. Pradipta、Katsunori Tanaka
DOI:10.1002/chir.23265
日期:2020.9
Imine is one of the most versatile functional groups in chemistry and biochemistry fields. Although many biochemical reactions involve imine formation, the inherently unstable property of N‐alkyl‐α,β‐unsaturated imines still hindered their utilization in organic synthesis. In this article, we described that the N‐alkyl‐α,β‐unsaturated imines, which prepared from alkylamines and acrolein, could smoothly
Catalytic oxidation of furan and hydrofuran compounds 8. Synthesis of 5-ethoxycarbonyl-4-hydroxy-3-oxo-2(3H)-furanone by the oxidation of furfural in the system aqueous H2O2-VOSO4-ethanol
作者:V. V. Poskonin
DOI:10.1007/s10593-008-0043-3
日期:2008.3
The special features of the oxidation of furfural by aqueous hydrogen peroxide in the presence of vanadyl sulfate and ethanol has been studied for the first time. It has been established that this reaction proceeds with the formation of previously unknown oxidation products of furan compounds, one of which was isolated from the reaction mixture as the ethyl ester. It was established by spectral methods and qualitative reactions that this product is 5-ethoxycarbonyl-4-hydroxy-3-oxo-2(3H)-furanone.
Highly Efficient Self‐Assembly of Metallacages and Their Supramolecular Catalysis Behaviors in Microdroplets
Supramolecularself-assembly of well-defined metallacages in microdroplets was achieved through a continuous-flow microfluidic approach. The high efficiency and diversity of this strategy were illustrated by the generation of five representative metallacages with nearly quantitative yields in a few minutes. This approach is promising for the self-assembly of supramolecular systems in a confined space