2 edition of synthesis and circular dichroism of thiobenzimidates and their heterocyclic analogues. found in the catalog.
synthesis and circular dichroism of thiobenzimidates and their heterocyclic analogues.
Abdul Rauf Khokhar
by West Ham College of Technology
Written in English
Thesis (Ph.D.) - West Ham College of Technology, 1969.
Resistance to chemotherapy has become a major problem in cancer therapy. The new sugar amino acid (SAA) containing somatostatin analogues presented possess antiproliferative and apoptotic activity against both multidrug-resistant and drug-sensitive hepatoma carcinoma cells. Synthesis, design, and biological evaluation of the cyclic analogues and of the furanoid SAA used will be by: E. Lunt, C.G. Newton, in Comprehensive Heterocyclic Chemistry, UV Spectroscopy. Pyridopyrimidines in general show three bands in their UV spectra due to π–π* transitions (typically in the –, – and – nm regions in the parent compounds), together with a weak band due to an n–π* transition in the – nm region, in fair agreement with theoretical.
Solutions in ether and in methanol of a series of N-thiobenzoyl-L-α-amino-acids exhibit circular dichroism associated with their π→π* ultraviolet absorption maximum (log Îµ∼ 385) near contrast to the circular dichroism behaviour of this series near mµ(n→π* transition), that near mµ is little influenced in sign, and in the magnitude and wavelength of the. Chiral Au25 Nanospheres and Nanorods: Synthesis and Insight into the Origin of ChiralityCited by:
A novel and straightforward solid phase synthesis of distamycin analogues containing benzene units has been developed. intense induced circular dichroism Varshney, U.; Bhattacharya, S. Distamycin analogues without leading amide at their N-termini – comparative binding properties to AT- and GC-rich DNA by: 7. Tetrahedral DNA nanostructures can be readily taken up by cells. In their Communication on page ff., C. Fan, Q. Huang, and co‐workers investigate the endocytotic internalization into mammalian cells and subsequent transport of these self‐assembled DNA nanostructures by single‐particle tracking. These results constitute the next step toward the development of novel .
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Structural electrochemical study of hemoglobin by in situ circular dichroism thin layer spectroelectrochemistry. Biophysical Chemistry97 (), DOI: /S(02) Masaru AKITA, Daisuke TSUTSUMI, Masami KOBAYASHI, Hideo by: The circular dichroism spectra of the above oligopeptides were measured in the wavelength range – nm in a solution of M sodium chloride – M sodium phosphate, pHconditions at which the high molecular weight polytripeptide (Tyr‐Ala‐Glu) n exists in a helical by: We report a method to determine the absolute configuration of α‐amino acids by exciton coupled circular dichroism (ECCD).
Naturally occurring amino acids were successfully derivatized with 2‐bromomet Cited by: Several optically active substituted 3-oxabicyclohexanones and their thiocarbonyl analogues were synthesized, and their circular dichroism spectra are reported.
It was found that the n-π ∗ Cotton effect sign is determined by the helicity of an inherently chiral chromophore formed by the lactone or thiolactone group and the Cited by: Synthesis and circular dichroism of (1R)-N-nitrosodeuterioapocamphidine. Tadeusz Połoński Abstract.
Comparison Synthesis and circular dichroism of (journal articles, books or book chapters) do not need to formally request permission to reproduce material contained in this article provided that the correct acknowledgement is given. The C-1 epimers of the 3-methyl-6,7-dimethoxy analogues of the D 4 antagonist sonepiprazole 1b and 5-HT 1D agonist PNU 1a containing both the isochroman and p-methoxyphenylpiperazine chromophores were prepared in order to study the applicability of circular dichroism for the assignment of the configuration of 1,3-disubstituted isochromans and test their dopamine D 4 antagonist by: 5.
Etivand, Nasser; Khalafy, Jabbar; Dekamin, Mohammad G.: Fast and Efficient Green Procedure for the Synthesis of Benzo[5,6]chromene Derivatives and Their Sulfur Analogues in Water by Organocatalyst Potassium Phthalimide-N-oxyl.
The synthesis of 11a,25a-dibora,12,25,tetraoxatetranaphtho[1,2-a:2′,1′-f:1″,2″-j:2‴,1‴-o]perylene, a double heterohelicene containing OBO units, has been achieved via tandem demethylation-borylation, representing the highest double helicene reported thus far with all six-membered rings.
Single-crystal X-ray analysis clearly demonstrated a significantly twisted structure Cited by: •Synthesis of the GSK p38 kinase inhibitor 1,3‐Azoles Synthesis of 2-Butylchlorohydroxymethyl-1H-imidazole H N N CH3 HO H2N HN CH3 HO O OH Cl HN N N N N CH3 H2N HN CH3 H N N CH3 HO H N CH3 HO HO O OH + 1.
Me3SiCl, succinimide 3. Zn, AcOH NH3,MeOH Cl HO N Cl Losartan N Cl Synthetic Communications (), 23(18), 2. The design and synthesis of amide-linked saccharide oligomers and polymers, which are predisposed to fold into specific ordered secondary structures, is of significant interest.
Herein, right-handed helical poly amido-saccharides (PASs) with β-N-(1→2)-d-amide linkages are synthesized by the anionic ring-opening polymerization of an altrose β-lactam monomer (alt-lactam).Cited by: Polycyclic analogues of 6.
Synthesis, optical resolution and circular dichroism of trans-transoid-trans-perhydrophenanthrenone and trans-transoid-trans-perhydrophenanthrenone. Thieme E-Books & E-Journals.
Institut für Organische Chemie der Technischen Universität Hannover, D Hannover, Schneiderberg 1BCited by: A new series of compounds containing thiazole nucleus as Rhodanine analogues have been synthesized.
The new compounds were prepared from the reactions of the thiosemicarbazones (3a,b) with a series of α‐halo carbonyl compounds to give the corresponding Rhodanine thiosemicarbazones derivatives (3a,b) were reacted also with hydrazonoyl chlorides to afford the Cited by: 8. A grand challenge that crosses synthetic chemistry and biology is the scalable production of functional analogues of biomacromolecules.
We have focused our attention on the use of deoxynucleoside building blocks bearing non-natural bases to develop a synthetic methodology that allows for the construction of high molecular weight deoxynucleotide by: This methodology also offers an avenue for the direct syntheses of hitherto unreported 6-alkoxycarbonyl-substituted neo-tanshinlactones and their heterocyclic analogues.
A new synthesis of 4-alkyl. Circular dichroism of pyridazino[4,5-&]cholestenes Dimethyl r^2ino(4,5-b]-5aCited by: 4. Circular Dichroism and Conformational Dynamics of Cephams and Their Carba and Oxa Analogues Article in Chemistry 13(23) August with 49 Reads How we measure 'reads'.
Thiobenzimidates derived from -thiobenzoylamino-acids show negative c.d. associated with the high intensity absorption maximum near nm. characteristic of these compounds; the 4-methylphenylthiazoline obtained from -alanine shows the same c.d.–structure relationship. Analogous derivatives from Cited by: 4.
Synthesis, optical resolution and circular dichroism of trans-transoid-trans-perhydrophenanthrenone and trans-transoid-trans-perhydrophenanthrenone B.
Alcaide, M. Tarazona and F. Fernández, J. Chem. Soc., Perkin Trans. 1,A new method for the synthesis of 2',3'-dideoxynucleoside analogues has been developed. An electrochemical activation of 2-substituted furans is followed by the coupling with a pyrimidine or. A series of combretastatin A-4 (CA-4) analogues were synthesized, and their cytotoxic effects against murine Colon 26 adenocarcinoma and inhibitory activity on tubulin polymerization were evaluated.Markham AK, Porter RA, Gait MJ, Sheppard RC, Kerr IM () Rapid chemical synthesis and circular dichroism properties of some 2–-5–-linked oligoadenylates.
Nucleic Acids Cited by: 4.Modern Radical Methods and their Strategic Applications in Synthesis Bürgenstock Special Section – Future Stars in Organic Chemistry Modern Strategies for Borylation in Synthesis.