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Zinc Dust (zinc + dust)
Selected AbstractsChemInform Abstract: Synthesis of Indolones and Quinolones by Reductive Cyclization of o-Nitroaryl Acids Using Zinc Dust and Ammonium Formate.CHEMINFORM, Issue 46 2008Bhima Reddy Dinesh 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] Structural Characterization and a New One-Pot Synthesis of trans -Chloro(phenyl)bis(triphenylphosphane)nickel(II)EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 9 2003Alexander Zeller Abstract trans -[NiCl(Ph)(PPh3)2], the organometallic precursor for a new class of neutral polymerization catalysts, has been synthesized via a new synthetic route. The previously used alkylaluminum compounds are replaced by zinc dust for the reduction of the nickel(II) salt in the presence of triphenylphosphane forming the intermediate Ni(PPh3)4. In a one-pot reaction, chlorobenzene then adds oxidatively to the intermediate to form the title compound, which was structurally characterized, in high yields. Its geometry is compared to known structures of the higher homologues of group 10. All complexes adopt a distorted square-planar geometry, but the parent structure shows significantly shorter metal-ligand bond lengths than its Pd and Pt congeners, as expected. Density functional theory calculations (B3LYP/6,31G*) on the full structure are in very good agreement with the solid-state structure. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003) [source] One-pot synthesis of imidazo[1,2- c]quinazoline derivatives from nitro-componds reduced by zincJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 5 2009Da-Qing Shi An efficient, convenient, one-pot synthesis of imidazo[1,2- c]quinazolines was accomplished in good yields via the novel reductive cyclization of 2-(2-nitrophenyl)-1H -imidazole with isothiocyanates mediated by zinc dust. J. Heterocyclic Chem., (2009). [source] Sonochemical reformatsky reactions of ,-bromoesters with sym-(keto)dibenzo-16-crown-5JOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 6 2001Nathan A. Ross Reactions of sym-(keto)dibenzo-16-crown-5 with ethyl ,-bromoesters, zinc dust and iodine in dioxane and/or tetrahydrofuran under irradiation by high intensity ultrasound (HIU) provide ,-hydroxy lariat ether esters in 79-91% yields. HIU-promoted Reformatsky reactions offer several advantages over customary thermal reaction conditions. [source] ChemInform Abstract: Titanium(III) Chloride Mediated Synthesis of Furan Derivatives: Synthesis of (.+-.)-Evodone.CHEMINFORM, Issue 42 2010S. K. Mandal Abstract Title compounds (IV) and (VI) including the naturally occurring furanoterpene evodone (IVb) are synthesized by a radical cyclization reaction using titanocene(III) chloride, generated in situ from TiCl2(Cp)2 and zinc dust, as radical source. [source] | ||||||||||