منابع مشابه
I. New Cycloadditions for the Synthesis of Nitrogen Heterocycles
Alkyliminoacetonitrile derivatives were investigated as dienophiles in the Diels-Alder reaction. These activated imines react with dienes in intramolecular [4+2] cycloadditions to provide products with either the quinolizidine or indolizidine ring system, depending on the length of the tether connecting diene and dienophile. Quinolizidine cycloadducts are formed in good yield and with high ster...
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Fused benzenoid heterocyclic systems, i.e., benzo[c]cinnoline (3), dibenzo[a,c]phenazine (4), and quinoxaline derivatives 5 and 6, were reduced with lithium and sodium in ether solvents to the corresponding antiaromatic doubly charged species. These dianions represent a new class of charged species, Le., nitrogen-containing polycyclic anions. The 'H and I3C NMR spectra as well as theoretical ca...
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Nitrogen heterocycles are abundant in natural products and pharmaceuticals. An emerging interest among synthetic chemists is to use C-H functionalization to construct the nitrogen-containing core of these heterocycles. The following article will provide a brief overview of this concept with respect to the type of C-H bond functionalized.
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Luminescence is now well established as a sensitive and selective technique for trace analysis of environmental samples.1 In pharmaceutical analysis, however, its frequency of use is reduced. This may be a result of the current ascendancy of high-performance liquid chromatography (HPLC) and the broad band width, featureless luminescence spectra of drug components. In addition, for formulated ph...
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Cyclic voltammetry and constantcurrent electrolysis in a one-compartment cell with a sacrificial anode has been used to study the indirect electroreduction of N-allyl-haloamides by electrogenerated Ni(I) complexes conducted in N,N-dimethylformamide (DMF) and acetonitrile (ACN) and the results were compared with those obtained in protic solvents such as EtOH and EtOHH2O mixtures. It was obser...
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ژورنال
عنوان ژورنال: Molecules
سال: 2005
ISSN: 1420-3049
DOI: 10.3390/10020318