Transformation thermique de phenyl-2methyl-4 (methyl-1' diphenyl-2',3' cyclopropene-1' yl)-4 oxazoline-2 one-5 en un melange de dimethyl-2,3, -2,4, et -2,5,三苯基吡啶。Mecanisme faisant intervenir 丁腈橡胶中间体
Synthesis of Highly Substituted Pyridines through Copper-Catalyzed Condensation of Oximes and α,β-Unsaturated Imines
作者:Wei Wen Tan、Yew Jin Ong、Naohiko Yoshikai
DOI:10.1002/anie.201704378
日期:2017.7.3
A copper-catalyzed condensation reaction of oxime acetates and α,β-unsaturated ketimines to give pyridine derivatives is reported. The reaction features mild conditions, high functional-group compatibility, and high regioselectivity with respect to unsymmetrical oxime acetates, thus allowing the preparation of a wide range of polysubstituted pyridines, many of which are not readily accessible by conventional
<i>N</i>-Silylenamines as Reactive Intermediates: Hydroamination for the Modular Synthesis of Selectively Substituted Pyridines
作者:Erica K. J. Lui、Daniel Hergesell、Laurel L. Schafer
DOI:10.1021/acs.orglett.8b02703
日期:2018.11.2
modular and selective synthesis of mono-, di-, tri-, tetra-, and pentasubstituted pyridines is reported. Hydroamination of alkynes with N-silylamine using a bis(amidate)bis(amido)titanium(IV) precatalyst furnishes the regioselective formation of N-silylenamines. Addition of α,β-unsaturated carbonyls to the crude mixtures followed by oxidation affords 47 examples of pyridines in yields of up to 96%
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.