Results 51 to 60 of about 40,209 (198)

Recent Advances in Synthesis of Nitrogen-Containing Heterocyclic Compounds Catalyzed by Schiff–Base Complexes

Journal of Chemistry
In recent years, there has been a significant surge in the catalytic utilization of Schiff–base complexes. These compounds prove to be highly effective as homogeneous catalysts in organic syntheses.
Mehdi Fallah-Mehrjardi, Soheil Sayyahi
doaj   +1 more source

Cycloalkenopyridines by ring transformations of diazines and triazines [PDF]

, 2008
This paper is a short review on the synthesis of 2,3-cycloalkenopyridines and 3,4-cycloalkenopyridines by inter- and intra-molecular ...
Plas, H.C., van der
core   +3 more sources

Comprehensive Organic Analysis of Antartic Micrometeorites [PDF]

, 2008
Introduction: Micrometeorites (MMs) are thought to be significant contributors of organic material to the early Earth [1], and a variety of techniques have been employed to identify their organic composition [2-6]. These include the identification of key
Dobrica, E., Gilmour, I., Pearson, V. K., Turner, D. C., Wilson, R. C.   +4 more
core  

Silver and platinum-catalysed addition of O–H and N–H bonds to allenes [PDF]

, 2014
Transition-metal catalysed nucleophile addition to allenes is a very powerful tool for the synthesis of functionalised molecules containing heteroatoms, heterocycles in the intramolecular version, or allyl derivatives in the intermolecular version.
Munoz-Herranz, Maria
core   +1 more source

Renewable Microalgae-derived Nitrogen Doped Hydrothermal Carbons [PDF]

, 2012
Nitrogen-doped carbon materials are synthesized via an effective, sustainable, and green one-step route based on the hydrothermal carbonization of microalgae with high nitrogen content (ca. 11 wt %).
Falco, Camillo, Rothe, Regina, Sevilla Solís, Marta, Titirici, María-Magdalena, White, Robin J.   +4 more
core   +1 more source

Expanding a fluorescent RNA alphabet: synthesis, photophysics and utility of isothiazole-derived purine nucleoside surrogates. [PDF]

, 2017
A series of emissive ribonucleoside purine mimics, all comprised of an isothiazolo[4,3-d]pyrimidine core, was prepared using a divergent pathway involving a key Thorpe-Ziegler cyclization.
Fin, Andrea, Rovira, Alexander R, Tor, Yitzhak   +2 more
core   +1 more source

Preparation of 6-Substituted Quinoxaline JSP-1 Inhibitors by Microwave Accelerated Nucleophilic Substitution

Molecules, 2006
A small library of 6-aminoquinoxalines has been prepared by nucleophilic substitution of 6-fluoroquinoxaline with amines and nitrogen-containing heterocycles under computer-controlled microwave irradiation.
Jingkang Shen, Jia Li, Jian Liu, Yongliang Zhang, Jingya Li, Xin Wang, Xin Li, Beiying Qiu, Li Zhang   +8 more
doaj   +1 more source

Investigation of furo[2,3-h]- and pyridazino[3,4-f]cinnolin-3-ol scaffolds as substrates for the development of novel HIV-1 integrase inhibitors [PDF]

, 2011
With the aim to develop novel HIV-1 integrase inhibitors, we obtained a set of condensed ring systems based on the furo[2,3-h]cinnolin-3(2H)-one and pyridazino[3,4-f]cinnolin-3-ol scaffolds bearing a potential chelating pharmacophore, which can be ...
Casule, Paola, Derudas, Marco, El-Tamany, El-Sayed H, Gomaa, Mohamed F Y, Hasanen, Jehan Abd-Elrazik, Mariani, Alberto, Pala, Nicolino, Sechi, Mario   +7 more
core   +1 more source

A Greener and Efficient Method for Nucleophilic Aromatic Substitution of Nitrogen-Containing Fused Heterocycles

Molecules, 2018
A simple and efficient methodology for the nucleophilic aromatic substitution of nitrogen-containing fused heterocycles with interesting biological activities has been developed in an environmentally sound manner using polyethylene glycol (PEG-400) as ...
Joana F. Campos, Mohammed Loubidi, Marie-Christine Scherrmann, Sabine Berteina-Raboin   +3 more
doaj   +1 more source

Ethyl 1-benzyl-1,2,3,3a,4,10b-hexa-hydro-pyrrolo-[2',3':3,4]pyrrolo-[1,2-a]benzimidazole-2-carboxyl-ate. [PDF]

, 2011
The title mol-ecule, C(22)H(23)N(3)O(2), was obtained via an intra-molecular cyclo-addition of an azomethine ylide and an alkene tethered by a benzimidazole unit. The benzoimidazole unit is essentially planar, with an r.m.s.
Fettinger, James C, Kurth, Mark J, Meng, Liping   +2 more
core   +2 more sources