Results 11 to 20 of about 195,223 (291)

Synthesis, Characterization and Biological Evaluation of Some New Heterocyclic Compounds Derived from 2-Naphthol

Zanco Journal of Pure and Applied Sciences, 2020
    The present study deals with the synthesis, spectroscopic characterization, antibacterial and antifungal activities of novel series five-membered ring heterocyclic compounds containing nitrogen and sulfur heteroatoms.
Trifa Khalaf Mohammed, Media Noori Abdullah, Rostam Rasul Braiem   +2 more
doaj   +3 more sources

Synthesis of New Heterocyclic compounds derived from Pyrazoline-5-one compound

Al-Mustansiriyah Journal of Pharmaceutical Sciences, 2011
In this work new heterocyclic pyrazolin derivatives have been synthesized from diazonium chloride salt of 4-aminobenzoic acid: firstly, Azo compounds were prepared from the reaction of an ethanolic solution of sodium acetate and calculated amount of ...
Rafah F. Al-Smaisim, Redha E. Al-Bayati, Abdul Hussain K. Sharba   +2 more
doaj   +1 more source

Synthesis and Characterization of a New Series of [1, 3]-Oxazepine Compounds from Heterocyclic Schiff Bases

Zanco Journal of Pure and Applied Sciences, 2023
      In this study a new Series of aromatic heterocyclic [1, 3]-oxazepine have been synthesized by two steps. The first-step included synthesis of imine derivatives (1–7) using glacial acetic acid as a catalyst in the condensation reaction of 4-(6 ...
Roshna B. Nadr, Bana S. Abdulrahman
doaj   +1 more source

Novel applications of the "t-amino effect" in heterocyclic chemistry. Synthesis of a pyrrolo[1,2-a]quinazoline and 5H-pyrrolo[1,2-a][3,1]benzothiazines [PDF]

, 1984
1-(1-Pyrrolidinyl)benzenes substituted with an imino- or an in situ generated thiocarbonyl group in the 2-position rearrange upon heating to quinazoline and benzothiazine derivatives ...
Hamzink, M.R.J., Reinhoudt, D.N., Verboom, W., Visser, R.   +3 more
core   +3 more sources

Microwave-Assisted Stereoselective Heterocyclization to Novel Ring d-fused Arylpyrazolines in the Estrone Series

Molecules, 2019
Microwave-assisted syntheses of novel ring d-condensed 2-pyrazolines in the estrone series were efficiently carried out from steroidal α,β-enones and hydrazine derivatives. The ring-closure reaction of 16-benzylidene estrone 3-methyl ether with
Gergő Mótyán, Barnabás Molnár, János Wölfling, Éva Frank   +3 more
doaj   +1 more source

Alkali-metal-mediated zincation (AMMZn) meets N-heterocyclic carbene (NHC) chemistry : Zn–H exchange reactions and structural authentication of a dinuclear Au(I) complex with a NHC anion [PDF]

, 2013
Merging two evolving areas in synthesis, namely cooperative bimetallics and N-heterocyclic carbenes (NHCs), this study reports the isolation of the first intermediates of alkali-metal-mediated zincation (AMMZn) of a free NHC and a Zn–NHC complex using ...
Aldeco-Perez, Andrikopoulos, Arduengo, III, Arduengo, III, Armstrong, Armstrong, Armstrong, Armstrong, Arnold, Arnold, Arnold, Back, Baillie, Bantu, Bourissou, Clegg, Clegg, Clegg, Conway, Crabtree, de Frémont, Diez-Gonzalez, Flower, Furuyama, Ghadwal, Gomez-Suarez, Guisado-Barrios, Haag, Hashmi, Hashmi, Hashmi, Hashmi, Hashmi, Hashmi, Jimenez-Nunez, Kobayashi, Kronig, Linton, Masuda, Mendoza-Espinosa, Mulvey, Mulvey, Mulvey, Mulvey, Musgrave, Nobuto, Raubnheimer, Rudolph, Rudolph, Schuster, Uchiyama, Wang, Wang, Wang, Wang, Westerhausen   +55 more
core   +1 more source

Crystal structure of 4-(2-bromopropionyl)-3-phenylsydnone

Acta Crystallographica Section E, 2014
Sydnones are a class of mesoionic compounds containing a five-membered heterocyclic ring. In general, sydnone compounds are synthesized with an aromatic substutuent at the N3 position. This feature, adds to the stability of the heterocyclic ring.
D. Grossie, L. Harrison, K. Turnbull
doaj   +1 more source

Predicting Solid-State Heats of Formation of Newly Synthesized Polynitrogen Materials by Using Quantum Mechanical Calculations [PDF]

, 2008
We present density functional theory level predictions and analysis of the basic properties of newly synthesized high-nitrogen compounds together with 3,6-bis(2H-tetrazol-5-yl)-1,2,4,5-tetrazine (BTT) and 3,3′-azobis(6-amino-1,2,4,5-tetrazine) (DAAT ...
Abou-Rachid, H., Dudiy, S., Goddard, W. A., III, Hu, A., Song, Y., Zybin, S. V.   +5 more
core   +1 more source

Synthesis and studies molecular docking of some new thioxobenzo[g]pteridine derivatives and 1,4-dihydroquinoxaline derivatives with glycosidic moiety

Journal of Taibah University for Science, 2018
The present work is mainly dedicated to heterocyclic compounds as well as S-glycoside. 1,4-dihydroquinoxaline derivatives 3 were obtained from the reaction 2 with carbon disulfide in presence of potassium hydroxide.
Amira A. Ghoneim, Nadia Ali Ahmed Elkanzi, Rania B. Bakr   +2 more
doaj   +1 more source

Synthesis of New Pyrazoline - Phenoxathiin Derivatives

مجلة بغداد للعلوم, 2013
Phenoxathiin was prepared by the reaction of diphenyl ether with sulfur in the presence of anhydrous aluminum chloride. This work comprised the synthesis of new phenoxathiin derivatives containing heterocyclic moieties.
Baghdad Science Journal
doaj   +1 more source