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Showing 1 to 20 of 80 for “"Heterocyclic Compounds"”.
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Nitrogen-heterocyclic compounds in meteorites
Contains fulltext : mmubn000001_027004074.pdf (Publisher’s version ) (Open Access)
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Synthesis of biologically active heterocyclic compounds
… and Trypanosoma brucei gambiense. Any compounds synthesised would also be tested to assess their potential as anti-parasitic agents. Parker synthesised a range of polyazamacrocycles. Testing of compound A in vitro gave highly efficient DNA crosslinking activity. Copper complexes were …
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Synthesis and reactions of heterocyclic compounds
Dipyrido[1,2-c:2',1'-e]imidazolium iodide has been syntesised from 2,2'-bipridy and methylene iodide.
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Development of novel heterocyclic compounds as vascular targeting agents
… of the routes to the dibenzo[c,e]oxepine target compounds are described. The optimisation of a key biaryl precursor molecule for these analogues is described. This includes a brief overview of palladium catalysed coupling chemistry and a screen for suitable catalytic systems. In chapter three the …
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Synthesis and evaluation of novel heterocyclic compounds as anticancer agents
… active analoguesof combretastatin A-4.These heterocyclic analogues have been characterized and examined for their ability tosuppress the growth of A549, U-2 OS, BEAS-2B, Saos-2, Hep-G2, and A204 mammaliancell lines by MTT assay, and flowcytometry. …
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Synthesis of Novel Chiral Heterocyclic Compounds for Antibacterial Agents and Peptidomimetics
… blocks in the synthesis of biologically active compounds. These building blocks include nitrogen and oxygen-containing heterocycles such as 2-oxazolidinones, 1,3-oxazinan-2-ones, 2-oxazolines, oxazines, morpholine and morpholinones. Because of their interesting properties, chiral heterocycles …
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Excited state intramolecular proton transfer (ESIPT) to nitrogen in heterocyclic compounds
… large Stokes shifts. Approximately half of the compounds studied to date involve ESIPT to nitrogen but there has been no real attempt at a coherent study of ESIPT to nitrogen. In this work we have tried to remedy this deficiency by studying a range of compounds of increasing complexity in order …
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Tuning of the fluorescence properties of nitrogen heterocyclic compounds by polar substituents /
… of their optical properties by modifying new compounds with substituents of various polarity and morphology are analyzed. Special emphasis is placed on the radiative and non-radiative excitation relaxation mechanisms. This work demonstrates that the nitrogen heterocyclic fragments in …
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The Reaction of Cyanide Ion With Aromatic Nitriles and Aromatic Heterocyclic Compounds
Made available in DSpace on 2014-12-10T23:01:27Z (GMT). No. of bitstreams: 1 7309901.pdf: 2768526 bytes, checksum: 7e9e5fe298ad35b10b884a32a0da25b7 (MD5) Previous issue date: 1972
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Synthesis of heterocyclic compounds via intramolecular [4+2] cycloadditions of conjugated enynes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Synthesis and Complexation Studies of Heterocyclic Compounds With Two or Three Contiguous Hydrogen Bonding Sites
The design and synthesis of heterocyclic compounds with two or three adjacent hydrogen bonding sites is described. A general synthetic methodology was developed to produce 5-substituted anthyridine analogs. These compounds exhibited increased stability over the unsubstituted anthyridines. A novel …
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Anisotropic EPR and ENDOR studies of sulfur-containing heterocyclic compounds adsorbed on silica-alumina surfaces
The physical phenomenon of an organic molecule adsorbing onto a silica-alumina surface is a topic of great interest. Many questions concerning exactly how this phenomenon occurs still remain unanswered. Although Electron Paramagnetic Resonance and Electron-Nuclear Double Resonance techniques are …
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Radiofrequency Spectroscopy. A. Electron Spin Resonance in Free Radicals. B. Nuclear Magnetic Resonance in Heterocyclic Compounds
Made available in DSpace on 2014-12-05T19:36:56Z (GMT). No. of bitstreams: 1 5805485.pdf: 2708020 bytes, checksum: 69274de359c73105859962a1c137eba7 (MD5) Previous issue date: 1958
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Synthesis of o-isotoluenes, o-quinodimethanes, and benzoenynyl carbodiimides and their cyclizations to polycyclic and heterocyclic compounds
… two benzoenynyl carbodiimide moieties produced compounds having two indoloquinoline units connected at the 11 and the 11' positions with either a three-carbon or a five-carbon tether. By using 1,4-phenylene diisocyanate for the aza-Wittig reaction with two equiv of the iminophosphorane followed …
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A STUDY OF THE ELECTRONIC PROPERTIES OF SOME HETEROCYCLIC COMPOUNDS AND THE THERMAL DECOMPOSITION OF METHYLATED THIOBUTYROLACTONES
… investigated the electronic structures of some biheterocyclic compounds and substituted thiophenes. The second discussed the pyrolyses of three methylated thiobutyrolactones. The electronic structures of some biheterocyclic compounds containing various combinations of selenophene, thiophene and …
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Studies into the Biosynthesis and Chemical Synthesis of Indolocarbazoles and Related Heterocyclic Compounds. Metalation of Indole-6-Carboxamide.
… 2 describes a synthetic approach to primarily heterocyclic analogues of lycogarubin C. Suzuki coupling of appropriately functionalized 3,4-dibromopyrrole or 3,4-bis(trifluoromethanesulfonyl)pyrrole was effective for numerous π-excessive five-membered heterocyclic-3-boronic acids. The optimized …
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