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Benzaldehyde Derivatives (benzaldehyde + derivative)
Selected AbstractsChemInform Abstract: Palladium N-Heterocyclic-Carbene-Catalyzed ortho-Arylation of Benzaldehyde Derivatives.CHEMINFORM, Issue 1 2009Oeznur Dogan 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] Palladium N -heterocyclic-carbene-catalyzed ortho-arylation of benzaldehyde derivativesHETEROATOM CHEMISTRY, Issue 6 2008Öznur Dogan New, sterically demanding 1,3-dialkylbenzimidazolium salts (2a,c) as N -heterocyclic-carbene precursors have been synthesized and characterized. The ortho position of aromatic aldehydes was directly and selectively arylated with aryl chlorides in the presence of a catalytic system prepared in situ from Pd(OAc)2, 1,3-dialkylbenzimidazolium chlorides (2a,c), and Cs2CO3. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:569,574, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20479 [source] Computational study of the synthesis of benzoin derivatives from benzilINTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, Issue 7 2006Kevser Göçmen Topal Abstract Benzil (1,2-diphenylethane-1,2-dione) undergoes cyanide catalyzed condensation with benzaldehyde to yield O -benzoylated benzoin (2-benzoyl-1,2-diphenylethanone). In this study, the experimentally suggested mechanism has been modeled with PM3 and verified with B3LYP. The effect of the substituent on the reaction yield has been rationalized by considering two benzil derivatives; 1,2-bis(2-chlorophenyl)ethane-1,2-dione and 1,2-bis(2-fluorophenyl)ethane-1,2-dione and three benzaldehyde derivatives; o -fluorobenzaldehyde, o -methylbenzaldehyde and 2-pyridinecarboxaldehyde. The effect of the solvent has been modeled by using the isodensity-surface polarizable continuum (IPCM) model. Reactivity descriptors have been used to justify the reactivity differences of the various substituents. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2006 [source] An efficient one-pot synthesis of 6-aryl-5-cyano-2-thiopyrimidinone derivatives and their piperidinium ionic forms, x-ray crystal structuresJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 4 2006Saeed Balalaie Three-component condensation of benzaldehyde derivatives, alkyl cyanoacetates and thiourea in the presence of piperidine in reflux condition provides a direct route to piperidinium 6-aryl-5-cyano 2-thiopyrimidonate salts in good yields. These reactions were also carried out under microwave irradiation. The yields of products under the microwave condition were better as compared to the reflux media. The acidification of these ionic forms resulted in the formation of 6-aryl-5-cyano-2-thiopyrimidone derivatives. The X-ray structures of the ionic forms (4, 5, and 7) show that there are anionic thiopyrimidinone skeletons hydrogen bridged with piperidinium cations. [source] Zinc Hydrogensulfate as an Efficient Catalyst for Preparation of , -Amido Carbonyl CompoundsCHINESE JOURNAL OF CHEMISTRY, Issue 10 2009Hamid Reza Shaterian Abstract A one-pot and efficient three-component condensation of benzaldehyde derivatives, enolizable ketones or ketoesters, acetyl chloride, and acetonitrile or benzonitrile under ambient conditions in the presence of zinc hydrogensulfate for the synthesis of , -amido carbonyl compounds is described. The simple experimental procedure, high to excellent yields of products and preparation of diastereoselective , -acetamido ketoesters are strong features of the presented method. [source] | ||||||||||