Facile Synthesis of Pyridines from Propargyl Amines: Concise Total Synthesis of Suaveoline Alkaloids
作者:Zhiwen Zhao、Hongbo Wei、Ke Xiao、Bin Cheng、Hongbin Zhai、Yun Li
DOI:10.1002/anie.201811812
日期:2019.1.21
A general and efficient protocol was developed for the synthesis of polysubstituted pyridines from propargyl amines and unsaturated carbonyl compounds through a tandem condensation/alkyne isomerization/6π 3‐azatriene electrocyclization sequence. This process was found to be applicable to a wide range of readily available substrates (30 examples, up to 95 % yield) and could be readily performed on a
Quick Access to Pyridines through 6π-3-Azatriene Electrocyclization: Concise Total Synthesis of Suaveoline Alkaloids
作者:Hongbo Wei、Yun Li
DOI:10.1055/s-0037-1611811
日期:2019.9
different methodologies have been developed for the synthesis of these kinds of molecules. However, a sustainable and efficient procedure for the synthesis of pyridines is still highly desirable. In this Synpacts article, we highlight our recent approach to the construction of highly substituted pyridines though a tandem condensation/alkyne isomerization/6π-3-azatriene electrocyclization sequence.
An object of the present invention is to provide an organic electroluminescence device having excellent light emission efficiency and durability, in particular, durability when driving at a high temperature. Provided is an organic electroluminescence device including on a substrate a pair of electrodes, and at least one layer of an organic layer including a light emitting layer containing a light emitting material disposed between the electrodes, wherein the light emitting layer includes at least each one of specific indolocarbazole derivatives and specific condensed ring metal complexes.