Results 51 to 60 of about 3,172,708 (264)

Microwave-Assisted Synthesis of Novel Pyrazolo[3,4-g][1,8]naphthyridin-5-amine with Potential Antifungal and Antitumor Activity

Molecules, 2015
The microwave assisted reaction between heterocyclic o-aminonitriles 1 and cyclic ketones 2 catalyzed by zinc chloride led to new series of pyrazolo[3,4-b] [1,8]naphthyridin-5-amines 3 in good yields.
Paola Acosta, Estefanía Butassi, Braulio Insuasty, Alejandro Ortiz, Rodrigo Abonia, Susana A. Zacchino, Jairo Quiroga   +6 more
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

Optimization of green and environmentally-benign synthesis of isoamyl acetate in the presence of ball-milled seashells by response surface methodology

Scientific Reports, 2023
Ball-milled seashells, as a nano-biocomposite catalyst and natural source of CaCO3 in its aragonite microcrystalline form with fixed CO2, was optimized for the synthesis of isoamyl acetate (3-methylbutyl ethanoate) by response surface methodology with a ...
Amir Hossein Fattahi, Mohammad G. Dekamin, James H. Clark   +2 more
doaj   +1 more source

Synthesis and in Vitro Antitumor Activity of a Novel Series of 2-Pyrazoline Derivatives Bearing the 4-Aryloxy-7-chloroquinoline Fragment

Molecules, 2014
A new series of NH-pyrazoline derivatives 6 was synthesized by cyclocondensation reaction of novel [(7-chloroquinolin-4-yl)oxy]chalcones 5 with hydrazine hydrate.
Alba Montoya, Jairo Quiroga, Rodrigo Abonia, Manuel Nogueras, Justo Cobo, Braulio Insuasty   +5 more
doaj   +1 more source

Optimization of preparation process of butyl rubber latex

Hecheng xiangjiao gongye, 2023
The butyl rubber（IIR）latex with good stablility was preparated by solution-emulsion method using IIR as raw material. And the effects of emulsifier type, emulsifier composition, pH value, mass ratio of oil to water and concentration process on ...
ZHANG Le，LI Hui，ZHU Ting-chun，LI Jian-ye，LI Bin
doaj   +1 more source

Synthesis and investigations of heterocyclic compounds as corrosion inhibitors for mild steel in hydrochloric acid

International Journal of Industrial Chemistry, 2019
The corrosion inhibition of mild steel in 0.5 M hydrochloric acid by six synthesized heterocyclic compounds was studied using weight loss measurements. The inhibition efficiency exceeded 95%.
Salima K. Ahmed, W. Ali, A. Khadom
semanticscholar   +1 more source

Quantum transport through molecular wires [PDF]

International Journal of Modern Physics B (IJMPB), Volume: 23, Issue: 2 (2009) pp. 177-187, 2008
We explore electron transport properties in molecular wires made of heterocyclic molecules (pyrrole, furan and thiophene) by using the Green's function technique. Parametric calculations are given based on the tight-binding model to describe the electron transport in these wires. It is observed that the transport properties are significantly influenced
arxiv   +1 more source

Types and properties of metal-free catalysts for living polymerizations of biomaterials [PDF]

, 2008
Syntéza biokompatibilních a biodegradabilních polyesterů, použitelných převážně v medicíně, využívá pro polymeraci za otevření kruhu katalyzátory na bázi kovu (např. Sn, Al atd.), které se mohou po implantaci deponovat v těle.
Repka, Martin
core  

Synthetic Methods for the formation of Heterocyclic Compounds from Oxime Ether Derivatives [PDF]

, 2023
Heterocyclic ring compounds are not only ubiquitous in prime diversity of vital natural products and synthetic pharmaceuticals and thus highly important in organic synthesis. They have an extensive range of applications.
Kumar, Himanshi, Kumari, Himani, Sharma, Kamlesh   +2 more
core   +2 more sources

Solvent-free microwave-assisted synthesis of novel pyrazolo[4′,3′:5,6]pyrido[2,3-d]pyrimidines with potential antifungal activity

Arabian Journal of Chemistry, 2016
Novel fused pyrazolo[4′,3′:5,6]pyrido[2,3-d]pyrimidines 5 were prepared by a solvent-free microwave assisted reaction of heterocyclic o-aminonitriles 3 and cyanopyridines 4 in the presence of tBuOK as catalyst.
Paola Acosta, Braulio Insuasty, Alejandro Ortiz, Rodrigo Abonia, Maximiliano Sortino, Susana A. Zacchino, Jairo Quiroga   +6 more
doaj   +1 more source