Results 21 to 30 of about 3,269,112 (357)

Cycloadditions of cyclohexynes and cyclopentyne. [PDF]

, 2014
We report the strategic use of cyclohexyne and the more elusive intermediate, cyclopentyne, as a tool for the synthesis of new heterocyclic compounds. Experimental and computational studies of a 3-substituted cyclohexyne are also described.
Garg, Neil K, Houk, KN, Jiménez-Osés, Gonzalo, McMahon, Travis C, Medina, Jose M   +4 more
core   +2 more sources

Chitosan-EDTA-Cellulose bio-based network: A recyclable multifunctional organocatalyst for green and expeditious synthesis of Hantzsch esters

Carbohydrate Polymer Technologies and Applications, 2023
The cellulose grafted to chitosan by ethylenediaminetetraacetic acid (Cs-EDTA-Cell) material was prepared and characterized by different spectroscopic, microscopic or analytical methods and techniques including Fourier transform infrared (FTIR) and ...
Negin Rostami, Mohammad G. Dekamin, Ehsan Valiey   +2 more
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

Designed Azolopyridinium Salts Block Protective Antigen Pores In Vitro and Protect Cells from Anthrax Toxin [PDF]

, 2013
Background:Several intracellular acting bacterial protein toxins of the AB-type, which are known to enter cells by endocytosis, are shown to produce channels.
A Kronhardt, A Messmer, A Ménard, A Ménard, AA Verveen, AF Kintzer, AM Friedlander, Anika Bronnhuber, AW Artenstein, BA Krantz, C Andersen, C Bachmeyer, C Bachmeyer, C Petosa, Christoph Beitzinger, CT Bahner, D Blöcker, D Blöcker, DB Lacy, EM Nestorovich, EM Nestorovich, F Conti, F Orlik, F Orlik, F Tonello, F Tonello, F Wohnsland, G Hajós, G Timári, G Vitale, György Hajós, H Barth, H Barth, Holger Barth, I Zornetta, J Sun, J Wesche, JA Young, JC Milne, JL Elliott, K Cunningham, KA Bradley, Kerstin Duscha, L Abrami, L Abrami, L Abrami, L Abrami, L Song, Ludger Johannes, M Eigen, M Mock, Markus Huber-Lang, MJ Brown, NS Duesbery, PC Hanna, R Benz, R Benz, R Palkó, R Pellizzari, RJ Collier, RO Blaustein, RO Blaustein, Roland Benz, S Nekolla, SH Leppla, SM Bezrukov, SM Bezrukov, T Neumeyer, T Neumeyer, T Neumeyer, TC Dixon, V Escuyer, VA Karginov, VA Karginov, VA Karginov, Y Singh, Zsuzsanna Riedl   +76 more
core   +2 more sources

Fe3O4/SiO2 decorated trimesic acid-melamine nanocomposite: a reusable supramolecular organocatalyst for efficient multicomponent synthesis of imidazole derivatives

Scientific Reports, 2023
This article describes supramolecular Fe3O4/SiO2 decorated trimesic acid-melamine (Fe3O4/SiO2-TMA-Me) nanocomposite that can be prepared with features that combine properties of different materials to fabricate a structurally unique hybrid material.
Babak Fattahi, Mohammad G. Dekamin
doaj   +1 more source

Mechanisms linking colorectal cancer to the consumption of (processed) red meat : a review [PDF]

, 2015
Colorectal cancer (CRC) is the third most commonly diagnosed cancer in the world. The vast majority of CRC cases have been linked to environmental causes rather than to heritable genetic changes.
De Smet, Stefaan, Demeyer, Daniël, Mertens, Birgit, Ulens, Michèle   +3 more
core   +2 more sources

One-pot multi-reaction processes: synthesis of natural products and drug-like scaffolds [PDF]

, 2014
One-pot multi-reaction processes involving Overman rearrangements, metathesis cyclizations, and Diels–Alder reactions have been developed for the rapid and efficient synthesis of amino-substituted carbocyclic and heterocyclic compounds.
Calder, Ewen D.D., Grafton, Mark W., Sutherland, Andrew   +2 more
core   +1 more source

Design and characterization of an urea-bridged PMO supporting Cu(II) nanoparticles as highly efficient heterogeneous catalyst for synthesis of tetrazole derivatives

Scientific Reports, 2022
In this work, a new periodic mesoporous organosilica with urea-bridges produced by the reaction of (3-aminopropyl)triethoxysilane and toluene-2,4-diisocyanate (APS-TDU-PMO) is introduced.
Ehsan Valiey, Mohammad G. Dekamin
doaj   +1 more source

Recent Advances in Heterocyclic Nanographenes and Other Polycyclic Heteroaromatic Compounds

Chemical Reviews, 2021
This review surveys recent progress in the chemistry of polycyclic heteroaromatic molecules with a focus on structural diversity and synthetic methodology. The article covers literature published during the period of 2016–2020, providing an update to our
Arseni Borissov, Yogesh Kumar Maurya, Liliia Moshniaha, Wai-Shing Wong, Marika Żyła-Karwowska, M. Stępień   +5 more
semanticscholar   +1 more source

Meat and cancer: haemoglobin and haemin in a low calcium diet promote colorectal carcinogenesis at the aberrant crypt stage in rats [PDF]

, 2003
High intake of red meat, but not of white meat, is associated with an increased risk of colon cancer. However, red meat does not promote cancer in rodents.
Corpet, Denis E., Petit, Claude, Pierre, Fabrice, Taché, Sylviane, Van der Meer, Roleof   +4 more
core   +5 more sources