Results 71 to 80 of about 40,209 (198)

Recent advances in visible-light photoredox-catalyzed nitrogen radical cyclization

open access: yesGreen Synthesis and Catalysis, 2020
Visible-light photoredox catalysis is a powerful and attractive strategy for organic molecule activation and new reaction design owing to its environmental-friendly characteristics and unique catalytic mechanisms, and has found wide applications in ...
Pengzi Wang   +3 more
doaj   +1 more source

Dirhenium Carbonyl Complexes Bearing 2-Vinylpyridine, Morpholine and 1-Methylimidazole Ligands [PDF]

open access: yes, 2008
Treatment of the labile compound [Re2(CO)8(MeCN)2] with 2-vinylpyridine in refluxing benzene affords exclusively the new compound [Re2(CO)8(μ-η1:η2-NC5H4CHCH2)] (1) in 39% yield in which the μ-η1:η2-vinylpyridine ligand is coordinated to one Re atom ...
Ahmed, Faruque   +7 more
core   +1 more source

Nucleotides: Structure and Properties [PDF]

open access: yes, 2005
Nucleotides consist of a nitrogen-containing base, a five-carbon sugar, and one or more phosphate groups. Cells contain many types of nucleotides, which play a central role in a wide variety of cellular processes, including metabolic regulation and the ...
Bowater, RP
core   +1 more source

Synthesis and Preliminary Antimicrobial Study of 2-Amino-5-Mercapto-1,3,4-Thiadiazole Derivatives

open access: yesIraqi Journal of Pharmaceutical Sciences, 2017
Nitrogen heterocycles are of a special interest because they constitute an important class of natural and non natural products, many of which exhibit useful biological activities.Among these nitrogen heterocycles are 1, 3, 4-thiadiazole containing ...
Husam A. Ameen, Ahlam J. Qasir
doaj   +3 more sources

Aminoazole-Based Diversity-Oriented Synthesis of Heterocycles

open access: yesFrontiers in Chemistry, 2018
The comprehensive review contains the analysis of literature data concerning reactions of heterocyclization of aminoazoles and demonstrates the application of these types of transformations in diversity-oriented synthesis.
Maryna V. Murlykina   +7 more
doaj   +1 more source

Pyrimidines: A New Versatile Molecule in the Drug Development Field, Scope, and Future Aspects

open access: yesPharmaceuticals
Pyrimidine is a moiety that occurs in living organisms and has a variety of significant biological properties in pharmacology. Due to the easy handling of synthesis, easily available precursor, and less duration for the reaction, for the synthesis, not ...
Katharigatta N. Venugopala, Vinuta Kamat
doaj   +1 more source

Regioselective reactions of 3,4-pyridynes enabled by the aryne distortion model. [PDF]

open access: yes, 2013
The pyridine heterocycle continues to play a vital role in the development of human medicines. More than 100 currently marketed drugs contain this privileged unit, which remains highly sought after synthetically. We report an efficient means to access di-
Garg, Neil K, Goetz, Adam E
core  

Oxetanes: Recent Advances in Synthesis, Reactivity and Medicinal Chemistry [PDF]

open access: yes, 2016
The 4-membered oxetane ring has been increasingly exploited for its behaviors, i.e. influence on physicochemical properties as a stable motif in medicinal chemistry, and propensity to undergo ring opening reactions as a synthetic intermediate.
Bull, JA   +4 more
core   +1 more source

A General Procedure for the Regioselective Synthesis of Aryl Thioethers and Aryl Selenides Through C–H Activation of Arenes [PDF]

open access: yes, 2014
A general procedure for the synthesis of aryl thioethers and aryl selenides in one-pot through sequential iridium-catalyzed C–H borylation and copper-promoted C–S and C–Se bond formation is described.
Chih-Lun Yi   +3 more
core   +1 more source

Experimental Simulation of Volatile Organic Contributions to Planetary Atmospheres and Surfaces [PDF]

open access: yes, 2007
We present the results of a new simulation of the atmospheric entry heating experienced by extraterrestrial dust particles, quantifying their volatile loss into the early Earth atmosphere and characterising their organic volatile ...
Franchi, Ian   +6 more
core  

Home - About - Disclaimer - Privacy