Fates of imine intermediates in radical cyclizations of <i>N</i>-sulfonylindoles and ene-sulfonamides
作者:Hanmo Zhang、E Ben Hay、Stephen J Geib、Dennis P Curran
DOI:10.3762/bjoc.11.181
日期:——
imine intermediates formed on radical cyclizations of ene-sulfonamides have been identified, reduction and hydration/fragmentation. Tin hydride-mediated cyclizations of 2-halo-N-(3-methyl-N-sulfonylindole)anilines provide spiro[indoline-3,3'-indolones] or spiro-3,3'-biindolines (derived from imine reduction), depending on the indole C2 substituent. Cyclizations of 2-haloanilide derivatives of 3-carboxy-N-sulfonyl-2
An efficient Pd-catalyzed decarboxylative cross-coupling reaction of simple enamides was achieved. Depending on the choice of the nitrogen-protecting group, a site-selective synthesis of mono- or diarylated framework(s) was performed under mild conditions. This unprecedented reactivity could be applied to the synthesis of a range of 2- or 2,4-diarylated nitrogen-containing bioactive derivatives.
An efficient iridium-catalyzed C(sp2)−H reaction of non-aromatic tertiary enamides was successfully developed under mild reaction conditions and with high regioselectivity, leading to original C-3 borylated enamides in good yields. These derivatives could then be exploited in Suzuki cross-coupling reactions, or converted into valuable 3,3-dihalogenopiperidine derivatives through short reaction times
Rh<sub>2</sub>(II)-Catalyzed Selective Aminomethylene Migration from Styryl Azides
作者:Chen Kong、Navendu Jana、Tom G. Driver
DOI:10.1021/ol400137q
日期:2013.2.15
Rh2(II)-Carboxylate complexes were discovered to promote the selective migration of aminomethylenes in β,β-disubstituted styryl azides to form 2,3-disubstitutedindoles. Mechanistic data are also presented that suggest that the migration occurs stepwise before diffusion of the iminium ion.
Die Erfindung betrifft neue substituierte Phenylsulfonylazole, ein Verfahren zu ihrer Herstellung und ihre Verwendung als Fungizide in Landwirtschaft und Gartenbau.
Die Verbindungen der Formal (I)
in der X, R und n die in der Beschreibung angegebene Bedeutung haben, wurden durch Reaktion eines substituierten Benzolsulfonylhalogenids mit einem Azol hergestellt.
Die Verbindungen der Formel (I) zeigen eine hohe Aktivitat gegen phytopathogene Fungi.
本发明涉及新型取代苯磺酰唑、其制备工艺及其在农业和园艺中作为杀真菌剂的用途。 式(I)化合物(其中 X、R 和 n 具有描述中给出的含义)是通过取代苯磺酰卤与唑反应制备的。 式(I)化合物对植物病原真菌具有高活性。