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Vilsmeier Reagent (vilsmeier + reagent)
Selected AbstractsBehavior of o-Hydroxyacetophenones Towards Action of POCl3/DMF (Vilsmeier Reagent) in the Presence of BF3×Et2O: A Novel Observation in the Synthesis of Chromones.CHEMINFORM, Issue 36 2005Om Prakash Abstract For Abstract see ChemInform Abstract in Full Text. [source] An Efficient Synthesis of 1H-Pyrazole-4-carboxylic Acid Esters with Vilsmeier Reagent under Neat Conditions.CHEMINFORM, Issue 44 2004R. Sridhar Abstract For Abstract see ChemInform Abstract in Full Text. [source] Facile Synthesis of [1]Benzopyrano[4,3-c]pyrazoles, 1-Aryl-3-(2-formamidophenyl)pyrazoles and 1-Aryl-3-phenyl-4-alkylpyrazoles Using Vilsmeier Reagent.CHEMINFORM, Issue 2 2003S. Selvi No abstract is available for this article. [source] A Facile and Efficient One-Pot Synthesis of Substituted Quinolines from ,-Arylamino Ketones Under Vilsmeier ConditionsEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 24 2009Yan Wang Abstract An efficient one-pot synthesis of substituted quinolines from ,-arylamino ketones in the presence of PBr3 in DMF has been developed. This general protocol provides a novel and facile access to substituted quinolines by sequential Vilsmeier,Haack reaction, intramolecular cyclization and aromatization reactions of ,-arylamino ketones. PBr3 plays a dual role in the quinoline synthesis: as a key component of the Vilsmeier reagent (PBr3/DMF) and as a reducing reagent. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source] Preparation and cyclization of 4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene 2,2-dioxideHETEROATOM CHEMISTRY, Issue 3 2005Li Tian Chloroformylation of 5,5-dimethyl-1,2- oxathiolan-4-one 2,2-dioxide 4 with Vilsmeier reagent (DMF/POCl3) led to the formation of cyclic ,-chloro-vinylaldehyde (4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene 2,2-dioxide 5). Compound 5 reacted with formamidine, o -aminophenol, 1,2-phenylenediamine, aminopyrazole, and aminotetrazole to give the corresponding heterocyclic compounds. © 2005 Wiley Periodicals, Inc. Heteroatom Chem 16:200,204, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20094 [source] Highly efficient intramolecular cyclizations of 2,-hydroxychalcones to 4-chloro-2H -chromenes under vilsmeier conditionsJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 4 2008Zhen-Hua Li Highly efficient intramolecular cyclization and of 2,-hydroxychalcones to 4-chloro-2H -chromenes under Vilsmeier conditions have been developed. In comparison with the reported methods, studies carried out indicate that Vilsmeier reagent generated in situ from DMF and bis(trichloromethyl) carbonate (BTC) provides excellent chemselectivity, higher yields and avoids the formation of inorganic phosphorus salts. [source] An efficient synthesis of 1- H -pyrazole-4-carboxylic acid esters with vilsmeier reagent under neat conditionsJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 3 2004R. Sridhar A convenient, solvent-free Vilsmeier reagent is experimented under neat condition (both thermal and microwave conditions). An efficient method for the synthesis of various substituted 1H -pyrazole-4-carboxylic acid esters is reported. [source] ChemInform Abstract: Polyfunctional Pyrazoles.CHEMINFORM, Issue 37 2010Part 5. Abstract based on the reaction of pyruvate N-aroylhydrazines (IV) with Vilsmeier reagent [source] An efficient synthesis of 1- H -pyrazole-4-carboxylic acid esters with vilsmeier reagent under neat conditionsJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 3 2004R. Sridhar A convenient, solvent-free Vilsmeier reagent is experimented under neat condition (both thermal and microwave conditions). An efficient method for the synthesis of various substituted 1H -pyrazole-4-carboxylic acid esters is reported. [source] | ||||||||||