نتایج جستجو برای: friedländer reaction
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Canonical microRNAs are excised from their hairpin-shaped precursors by Dicer. In order to find possible exceptions to this rule and to identify additional substrates for Dicer processing we re-evaluate the small RNA sequencing data of the Dicer knockdown experiment in MCF-7 cells orignally published by Friedländer et al. [Friedländer et al., 2012, Nucleic Acids Res 40:37-52]. While the well-kn...
A series of ethanodiazapolycenes were prepared in 87%-89% yields by Friedländer reactions of three o-aminoarenecarbaldehydes with bicyclo[2.2.2]octane-2,5-dione and their spectral, thermal, and structural properties were studied. Subsequent attempts to convert them to diazapolycenes have proved unsuccessful.
Ever since the publication of Dohm’s Ueber die bürgerliche Verbesserung der Juden (On Civil Improvement Jews) in 1781, which argued for Jewish political equality on humanitarian grounds, more and voices joined those demands. Prominent among them was David Friedländer, a friend disciple Moses Mendelssohn. One leading figures Berlin Haskalah, he worked towards establishing equal legal status Jews...
A highly effective one-pot Friedländer quinoline synthesis using inexpensive reagents has been developed. o-Nitroarylcarbaldehydes were reduced to o-aminoarylcarbaldehydes with iron in the presence of catalytic HCl (aq.) and subsequently condensed in situ with aldehydes or ketones to form mono- or di-substituted quinolines in high yields (66-100%).
Metal-free, operationally simple, and highly efficient one-pot aerobic process for the synthesis of functionalized/annulated quinolines is devised from easily available 2-aminobenzyl alcohol/2-aminobenzophenones and alkyl/aryl alcohols for the first time. The process involves two sequential reactions, namely in situ aerial oxidation of alcohols to the corresponding aldehydes/ketones followed by...
Phosphotungstic acid (H(3)PW(12)O(40)) was used as an efficient and recyclable catalyst for the synthesis of polysubstituted quinolines through the Friedländer condensation of 2-aminoarylketone with carbonyl compounds, which was achieved by conventional heating under solvent-free conditions.
A highly efficient methodology for the selective synthesis of nitrogen heterocycles via Friedländer reaction using carbon materials supported ZnO catalysts under green chemistry domain is presented. The influence physicochemical properties different supports, in particular an activated (AC), multi-walled nanotubes (MWCNT) and a aerogel (CA), on catalytic performance discussed. developed are eas...
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