Results 241 to 250 of about 195,223 (291)

Triterpenoids with modified A-ring as modulators of P-gp-dependent drug-resistance in cancer cells.

Chemico-Biological Interactions, 2021
Semi-synthetic A-cycle modified triterpenic derivatives with A-cycle condensed with a heterocyclic fragment (compound 1) and fragmented A-ring (compound 2) were tested for cytotoxicity against several tumor cell cultures and doxorubicin (Dox)-resistant ...
E. Rybalkina, N. Moiseeva, A. Karamysheva, D. Eroshenko, A. V. Konysheva, A. V. Nazarov, V. Grishko   +6 more
semanticscholar   +1 more source

Spectroscopic studies, antimicrobial activity, and computational investigations of hydrazone ligands endowed metal chelates

Applied organometallic chemistry, 2023
Our current efforts are aimed to synthesize 16 complexes of Co (II), Ni (II), Cu (II), and Zn (II) metal ions from heterocyclic hydrazone ligands by condensation reaction of 2,6‐diacetylpyridine with hydrazide derivatives to find out combating agent ...
Tanisha Arora, J. Devi, Amit Dubey, Aisha Tufail, B. Kumar   +4 more
semanticscholar   +1 more source

Heterocyclic organobismuth (III) compounds containing an eight-membered ring: Inhibitory effects on cell cycle progression.

Toxicology in Vitro, 2018
We previously showed that heterocyclic organobismuth compounds have excellent antimicrobial and antitumor potential. These compounds structurally consist of either six- or eight-membered rings.
K. Iuchi, T. Yagura
semanticscholar   +1 more source

ChemInform Abstract: Synthesis and Stereochemistry of Some Heterocyclic Saturated Compounds Based on l‐p‐Nitrophenylserinol Skeleton. Part 1. Ring‐Chain Tautomerism of Some Schiff Bases on l‐p‐Nitrophenylserinol.

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
M. DARABANTU, G. PLE, S. MAGER, E. COTORA, L. GAINA, L. COSTAS, A. MATES   +6 more
openaire   +1 more source

Chlorahupetenes A-D, Four Eudesmane-Type Sesquiterpenoid Dimer Enantiomers with Two Unusual Carbon Skeletons from Chloranthus henryi Var. hupehensis.

Journal of Organic Chemistry, 2022
(+)- and (-)-Chlorahupetenes A (1a and 1b), B (2a and 2b), C (3a and 3b), and D (4a and 4b), four unique enantiomeric pairs of eudesmane-type sesquiterpenoid dimers with two new carbon skeletons, were isolated from the aerial parts of Chloranthus henryi ...
Dan-Yang Zhang, Jinghong Zhou, Hui Yang, Min Wang, Yanan Wang, Shuai Liu, Zi-Mo Zhang, Peng-Yu Zhuang, Xiaoxia Wang, Hang Liu   +9 more
semanticscholar   +1 more source

ChemInform Abstract: SILICON HETEROCYCLIC COMPOUNDS PART 1, RING SIZE EFFECT IN RING CLOSURE BY HYDROSILATION

Chemischer Informationsdienst, 1974
AbstractDer Einfluß der Kettenlänge der zumeist aus Grignard‐Verbindungen dargestellten Alkenylsilane (I) auf die Bildung der Ringe (II) durch Platin‐katalysierte Hydrosilylierung wird untersucht.
J. V. SWISHER, H. H. CHEN
openaire   +1 more source

Synthesis and biological activities of novel nonpeptide angiotensin II receptor antagonists based on benzimidazole derivatives bearing a heterocyclic ring.

Bioorganic & Medicinal Chemistry, 2008
Xingwei Guo, Lin Shi, Rui Wang, Xiao-xiao Liu, Bo-Gang Li, Xiaoxia Lu   +5 more
semanticscholar   +1 more source

A MO analysis of the aromaticity of some nitrogen heterocyclic compounds

, 1989
O. Mó, M. Yáñez, J. Elguero
semanticscholar   +1 more source

Application of the five-membered ring blue light-emitting iridium products of cyclometalation reactions as OLEDs

, 2016
I. Omae
semanticscholar   +1 more source

Abnormal N‐Heterocyclic‐Carbene‐Mediated Fixation of CO2 and N2O, and the Activation of Tetrahydro­furan and Tetrahydrothiophene under Ambient Conditions

, 2016
A. Thakur, Pavan K. Vardhanapu, Gonela Vijaykumar, P. K. Hota, S. Mandal   +4 more
semanticscholar   +1 more source