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Oxalyl Chloride (oxalyl + chloride)
Selected AbstractsChemInform Abstract: A Synthetic Strategy for Polyfunctionalized Bicyclo[3.3.1]nonanes Based on a Tandem Three-Component [3 + 2] Cycloaddition of ,-Cinnamoyl Ketene-S,S-acetals with Oxalyl Chloride.CHEMINFORM, Issue 52 2009Yu-Long Zhao 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] ChemInform Abstract: Enamines of the 1,2,3,4-Tetrahydroisoquinoline Series in the Chichibabin Synthesis of Pyrrolo[2,1-a]isoquinolines and in Reaction with Oxalyl Chloride.CHEMINFORM, Issue 12 2008N. N. Polygalova 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] Formation of Fluoroalkyl-Containing Pyran-4-one in the Reaction of Lithium 4,4,4-Trifluoro-1-phenylbutane-1,3-dionate with Oxalyl Chloride.CHEMINFORM, Issue 44 2007O. P. Krasnykh 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] Direct Synthesis of Aromatic Nitriles from Aldehydes Using Hydroxylamine and Oxalyl Chloride.CHEMINFORM, Issue 31 2007Barahman Movassagh 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] Uncatalyzed Reaction of Silyl Ketene Acetals with Oxalyl Chloride: A Straightforward Preparation of Symmetrical Pulvinic Acids.CHEMINFORM, Issue 29 2005Benoit Heurtaux No abstract is available for this article. [source] Concave Imidazolinium Salts as Precursors to Concave N-Heterocyclic Carbenes,EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 6 2007Ole Winkelmann Abstract Concave bimacrocyclic imidazolinium ions 8 have been synthesized as precursors for N-heterocyclic carbenes 9 (NHC) in 13 to 29,% overall yields based on 2-nitroresorcinol (1). As bridgeheads, 2,6-bis(,-alkenyloxy)anilines 3 have been synthesized from 1. Reaction of 3 with oxalyl chloride, reduction to respective diamines 5, and ring closure with triethyl orthoformate gave N,N -diaryl-substituted imidazolinium ions 6. The terminal vinyl groups were connected by ring-closing metathesis to give bimacrocyclic imidazolinium ions 7, whose alkene functions were hydrogenated to give saturated bimacrocyles 8. The structure of 8a was elucidated by X-ray analysis. The respective NHC 9 was generated by deprotonation with potassium tert -butoxide, and 9 was scavenged with CS2 to give adduct 10. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source] Synthesis and insecticidal evaluation of novel N-oxalyl derivatives of diacylhydrazines containing methylcarbamate moietiesHETEROATOM CHEMISTRY, Issue 6 2005Chunhui Mao A series of new N -oxalyl derivatives of diacylhydrazines containing methylcarbamate moieties were synthesized by the reaction of N -oxalyl chloride of N -methylcarbmates with N - tert -butyl- N,N,-diacylhydrazines in the presence of sodium hydride. The reaction of oxalyl chloride with N - tert -butyl- N, N,-diacylhydrazines to yield 1,3,4-oxadiazole and 4- tert -butyl-2-substituted-phenyl-4H -1,3,4-oxadiazine-5,6-dione was found, and the reaction was studied in some detail. The title compounds were evaluated for molting hormone mimicking activity. The results of bioassay showed that the title compounds exhibit moderate larvicidal activities, and toxicity assays indicated that these compounds can induce a premature, abnormal, and lethal larval molt. © 2005 Wiley Periodicals, Inc. Heteroatom Chem 16:472,475, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20135 [source] The reaction of 3,4-dihydro-2H-pyran with oxalyl chloride: Formation and crystal structure analysis of an unexpected bicyclic productJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 5 2010Bernd Schmidt 3,4-Dihydro-2-H-pyran and oxalyl chloride react, depending on the conditions, to keto esters, a pyran-3-carboxylic acid or derivatives thereof, or to an hitherto unknown bicyclic acetal containing a vinyl chloride moiety. The structure of the latter product has been unambiguously elucidated by single-crystal X-ray structure analysis. A mechanism for its formation is proposed. J. Heterocyclic Chem., (2010). [source] Synthesis and biological evaluation of structural variants of carbazoquinocin CJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 3 2003Alparslan Aygün Some new structural variants of the alkaloid carbazoquinocin C were synthesized in a few steps with good to excellent yields. The key step comprises a cyclisation reaction of appropriate 2-vinylindoles with oxalyl chloride. The carbazole-3,4-quinones are able to trap oxygen-centred radicals. In some biological/biochemical assays some of these compounds exhibit extraordinary results including inhibition of cyclooxygenase-1 and 5-lipoxygenase in the ,M-range. Moreover some of the carbazoquinocin C-variants inhibit significant oxidative damage of cellular DNA in nM-range. [source] Synthesis of a deuterium-labelled standard of bufotenine (5-HO-DMT)JOURNAL OF LABELLED COMPOUNDS AND RADIOPHARMACEUTICALS, Issue 14 2007Yu-Yun Wang Abstract The Batcho,Leimgruber strategy was employed to synthesize 3-(2-dimethylamino-[2H4]-ethyl)-1H -indol-5-ol (bufotenine, 5-HO-DMT) (8) from commercial 3-methyl-4-nitro-phenol (1), benzyl bromide and N,N,dimethylformamide,dimethylacetal. Compound 4 was synthesized from compound 3 using the Batcho,Leimgruber strategy in the presence of Raney nickel and hydrazine hydrate. Compound 4 was treated with oxalyl chloride, dimethylamine and lithium aluminum [2H4]-hydride to yield [2-(5-benzyloxy-1H -indol-3-yl)-[2H4]-ethyl]-dimethyl-amine (7). The benzyl ether in compound 7 was cleaved by hydrogenolysis to give bufotenine 8. Copyright © 2007 John Wiley & Sons, Ltd. [source] Morphology and surface properties of some siloxane,organic copolymersPOLYMER INTERNATIONAL, Issue 6 2009Maria Cazacu Abstract BACKGROUND: It is well known that, due to their extremely low polarity, polysiloxanes are incompatible with almost any organic system. This incompatibility leads to phase separation in mixed siloxane,organic systems. RESULTS: Three siloxane,organic copolymers, poly[(5,5,-methylene-bis-salicylaldehyde)-imine-(1,3-bis(propylene)tetramethyldisiloxane)] (Paz1), poly[(2,5-dihydroxy-1,4-benzoquinone)-imine-(1,3-bis(propylene)tetramethyldisiloxane)] (Paz2) and poly[1,3-bis(propylene)tetramethyldisiloxane diamide] (Pam), were prepared by the reaction of 1,3-bis(3-aminopropyl)tetramethyldisiloxane with appropriate organic partners (5,5,-methylene-bis-salicylaldehyde, 2,5-dihydroxy-1,4-benzoquinone and oxalyl chloride, respectively). The morphologies dictated by the incompatibility between siloxane and polar organic moieties were investigated using differential scanning calorimetry and scanning electron microscopy. The surface activity of the copolymers and water vapour sorption capacity were also measured. CONCLUSION: Even though the polar sequences are very short ones, the highly flexible siloxane-containing sequence permits the self-assembly of these into more or less polar domains. Such an organization influences the properties of the resulting materials, an important place being occupied by the surface properties. Copyright © 2009 Society of Chemical Industry [source] | ||||||||||