Arynes Double Bond Insertion/Nucleophilic Addition with Vinylogous Amides and Carbodiimides
作者:Ran Li、Huarong Tang、Haixing Fu、Hailong Ren、Xuemei Wang、Chunrui Wu、Chao Wu、Feng Shi
DOI:10.1021/jo402754d
日期:2014.2.7
some C═X double bonds, leading to benzannulated four-membered rings. The strain of these rings allow for a ready, spontaneous opening to afford o-quinomethide analogues. Subsequent nucleophilicaddition re-aromatizes the intermediates to achieve ortho-difunctionalization of arynes. In this report, we describe the aryne insertion into the C═C double bonds of vinylogous amides and the C═N double bonds of
Primäre und sekundäre vinyloge Carbonsäureamide 1 reagieren mit Phenylisocyanat unter Bildung der Harnstoffe 2, nur die primären bilden mit Chloral die Addukte 4, deren Acetylierung zu den Estern 5 führt.
Enamine chemistry. Part XIV. Reaction of αβ-unsaturated acid chlorides with tertiary enamino-ketones and -esters
作者:P. W. Hickmott、G. Sheppard
DOI:10.1039/p19720001038
日期:——
4-Acetyl- and 4-benzoyl-3-(substituted amino)cyclohex-2-en-1-ones have been isolated from the reaction of acryloyl chloride with tertiary enamino-ketones. Tertiary enamino-ethyl esters give the corresponding 4-ethoxy-carbonylcyclohexenones. 2′,4′-Dimethyl-6′-morpholinoacetophenone has been obtained from the self-condensation of 4-morpholinopent-3-en-2-one and identified from spectral data.
Interaction of push–pull tert-enamines with phenylglyoxal
作者:Dmitry A. Sibgatulin、Dmitry M. Volochnyuk、Aleksander N. Kostyuk、Sergey P. Ivonin、Andriy V. Lapandin
DOI:10.1007/s00706-009-0110-1
日期:2009.6
AbstractThe reaction of push–pull enamines with 1,2-biselectrophilic phenylglyoxal was investigated. Phenylglyoxal was found to react depending on the structure of the push–pull enamine, affording either a hydroxyalkylation product at the methyl group or the cyclic product via participation of the methyl group and the β-carbon of the enamine. Graphical abstract
Synthesis of polyfunctionalized benzophenones via the reaction of 3-formylchromones with tertiary push–pull enamines
作者:Alexey Yu. Barkov、Vladislav Yu. Korotaev、Igor B. Kutyashev、Vyacheslav Ya. Sosnovskikh
DOI:10.1016/j.tet.2016.03.005
日期:2016.4
Uncatalyzed nucleophilic reaction of 3-formylchromones with tertiary push–pull enamines in refluxing acetonitrile gave polyfunctionalized benzophenone derivatives as a result of a [3+3] annulation in moderate to good yields.