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Imidoyl Chlorides (imidoyl + chloride)
Selected AbstractsChemInform Abstract: Palladium-Catalyzed Chloroimination of Imidoyl Chlorides to a Triple Bond: An Intramolecular Reaction Leading to 4-Chloroquinolines.CHEMINFORM, Issue 46 2008Akira Isobe Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Novel Heterocyclization of Imidoyl Chlorides with Mercaptocarboxylic Acids.CHEMINFORM, Issue 5 2007Yuliya V. Rassukana Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Convenient Synthesis of 2-Alkylamino-6-carboxy-5,7-diarylcyclopenteno[1,2-b]pyridines via Direct Acylamination with Imidoyl Chlorides.CHEMINFORM, Issue 31 2005Hirobumi Takahashi Abstract For Abstract see ChemInform Abstract in Full Text. [source] Iminohydroxamato Early and Late Transition Metal Halide Complexes , New Precatalysts for Aluminoxane-Cocatalyzed Olefin Insertion PolymerizationEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 8 2004Alexander Krajete Abstract We report on new families of non-metallocene metal precatalysts for olefin polymerization with titanium, zirconium, vanadium and nickel as the active metal sites. The novel ligand design concept is based on iminohydroxamic acids and their derivatives as the principal chelating units. Various anionic and neutral [N,O] and [N,N] ligand systems are easily accessible by a modular synthetic sequence of imidoyl chlorides with substituted hydroxylamines or hydrazines, respectively. Steric protection of the metal coordination site, a necessary requirement for suppression of chain termination pathways of non-metallocene catalysts, is brought about by bulky aryl substituents on the imino nitrogen atoms. Crystal structures of some of the hydroxamato ligands reveal interesting intermolecular hydrogen-bridged structures, whereas in the solid-state structure of one titanium precatalyst a five-membered chelate was observed, in line with the design principle of these systems. Preliminary ethylene polymerization studies with methylaluminoxane-activated metal complexes (M = Ti, Zr, V, Ni) show that the most active systems are [N,O]NiBr2 catalysts containing neutral O -alkyl iminohydroxamate ligands. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) [source] A New Synthesis of Push-Pull Pyrroles, Their Oxidation to Stable 3H -Pyrroles and an Unexpected Anellation ReactionEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 20 2009Gunther Buehrdel Abstract A new synthesis of push-pull pyrroles of type 5 was developed starting from bis(imidoyl chlorides) 1 and various iminodiacetic acid derivatives 3. The use of appropriate N -trifluoroacetyl residues as protecting/activating group proved to be the method of choice for the straightforward preparation of the 3,4-diarylamino-1H -pyrroles 5. When benzothiazole substructures are present in 2,5-position of heterocycles 5, a two-electron oxidation leads to 3H -pyrroles of type 6 in excellent yields. However, in the case of cyano or ester groups, a further oxidative process immediately led to the new 3H -pyrrolo[3,4- b]quinoxalines 7 via intramolecular ring anellation. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source] | ||||||||||