Results 11 to 20 of about 24,216 (244)
ON PYRIDINE HEMOCHROMOGEN [PDF]
Journal of General Physiology, 1929 1. Cyanide hemochromogen probably contains one cyanide group per heme group. 2. The equilibrium between pyridine hemochromogen and its components, pyridine and reduced heme, is complicated to an unknown extent by the precipitation of reduced heme and the aggregation of pyridine hemochromogen. 3.
A E, Mirsky, M L, Anson
openaire +2 more sources
From Pyridine to (−)‐Agelastatin A
Advanced Synthesis & Catalysis, 2023 Abstract(−)‐Agelastatin A was synthetized employing a flow photorearrangement of a pyridinium salt, constructing in one step the cyclopentene core possessing the desired functionalities and relative configurations. A flow enzymatic kinetic resolution of the resulting bicyclic vinyl aziridine delivered the enantiopure precursor to the natural product ...
Vale, João R. +5 more
openaire +4 more sources
Metastable Transitions in Pyridine and Pyridine Derivatives [PDF]
Zeitschrift für Naturforschung A, 1981 The kinetic energy released in metastable transitions in pyridine, 2, 3, 4 acetylpyridine and 2, 3, 4 aminopyridine differs for the different isomers. This indicates that the dissociation path-way of these compounds depends on the position of the nitrogen atom in the isomer.
Th. M. El-Sherbini +2 more
openaire +1 more source
An Efficient Synthesis of Novel Pyrazole-Based Heterocycles as Potential Antitumor Agents
Applied Sciences, 2017 A new series of pyrazolylpyridines was prepared by reaction of ethyl-3-acetyl-1,5-diphenyl-1H-pyrazole-4-carboxylate with the appropriate aldehyde, malononitrile, or ethyl acetoacetate and an excess of ammonium acetate under reflux in acetic acid ...
Magda A. Abdallah +5 more
doaj +1 more source
Molecules, 2022 Pyridine, 1,3,4-thiadiazole, and 1,3-thiazole derivatives have various biological activities, such as antimicrobial, analgesic, anticonvulsant, and antitubercular, as well as other anticipated biological properties, including anticancer activity.
Amr S. Abouzied +7 more
doaj +1 more source
Bohlmann-Rahtz Cyclodehydration of Aminodienones to Pyridines Using N-Iodosuccinimide
Molecules, 2010 Cyclodehydration of Bohlmann-Rahtz aminodienone intermediates using N-iodosuccinimide as a Lewis acid proceeds at low temperature under very mild conditions to give the corresponding 2,3,6-trisubstituted pyridines in high yield and with total ...
Mark C. Bagley, Christian Glover
doaj +1 more source
Molecules, 2021 Publications covering a new easy metal-free functionalization of pyridinoids (pyridines, quinolines, isoquinolines, acridine) under the action of the system of electron-deficient acetylenes (acetylenecarboxylic acid esters, acylacetylenes)/P-nucleophiles
Boris A. Trofimov +2 more
doaj +1 more source
Discovering the stacking landscape of a pyridine-pyridine system [PDF]
Journal of Molecular Modeling, 2017 Extremely extensive calculations of potential energy surfaces for the parallel-displaced configuration of pyridine dimer systems have been carried out using a dispersion-corrected density functional. Instead of focusing on stationary geometries these calculations provide much deeper insight into the "landscape" of the interaction energies of the ...
openaire +2 more sources
Molecules, 2010 The synthesis of the title compounds was achieved using ethyl 2-amino-6-methyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate (1) as starting material.
Hussein El-Kashef +4 more
doaj +1 more source