Results 31 to 40 of about 3,736 (153)

Modified Synthesis of Four Kinds of Azabicyclo Compounds

Chinese Journal of Applied Chemistry, 2012
Azabicyclo compounds of 1,4-benxodiazine,pyridopyrazine,1H-benzimidazole,3H-imidazopyridine were prepared from o-phenylenediamine or 2,3-diaminopyridine reacted with carbonyl compounds.The effects of reaction medium,pH,time and other factors on the reactions were invesitigated.The results showed that the yield of pyridopyrazine could reach 89.4% when ...
openaire   +1 more source

Photochemistry of Aromatic N‐Oxides in Water Probed by Time‐Resolved X‐ray Absorption Spectroscopy

Chemistry – A European Journal, EarlyView.
Time‐resolved XAS at the nitrogen and oxygen K‐edges is applied to the photorearrangement of two N‐oxides in water. Pyridine N‐oxide rapidly forms the oxaziridine isomer. Pyridazine N‐oxide undergoes ring opening to the diazo compound, without any evidence of intermediates.
Maximilian Paradiz Domínguez, Robby Büchner, Mattis Fondell, Albert M. Brouwer   +3 more
wiley   +1 more source

Strain Release of 1‐Azabicyclo[1.1.0]butanes as a Gateway to Highly Functionalized Azetidines: New Strategies and Structural Motifs

Chemistry – A European Journal, EarlyView.
Over the past decade, the interest in azetidines has continuously risen, by virtue of their highly appealing pharmaceutical properties. Monocyclic, spirocyclic, and bridged azetidines can be accessed by leveraging 1‐azabicyclo[1.1.0]butanes as precursors.
Yuri Gelato, Philipp Natho, Marco Colella, Renzo Luisi   +3 more
wiley   +1 more source

A Unified Approach for the Synthesis of Conformationally Locked and sp2‐sp3 Fused Hybrids

Chemistry – A European Journal, EarlyView.
This study presents a systematic platform to build rigid sp2–sp3 hybrids via benzyne cycloadditions. Arene‑fused bicyclic oxa‐, aza‐, and carbocycles are converted into medicinally relevant amino acids and applied to Enalapril analogues synthesis. The hybrids combine aromatic interactions with 3D rigidity, tuning lipophilicity, pKa, and solubility ...
Ervis Saraci, Federica Plavi, Giovanni Viscardi, Chad N. Ungarean, Massimo Boiocchi, Christophe Salome, Quentin Lefebvre, Thomas C. Fessard, David Sarlah   +8 more
wiley   +1 more source

Investigations Into the Metabolism and Elimination of Tesofensine in Human Urine

Drug Testing and Analysis, EarlyView.
This study investigated tesofensine metabolism and urinary elimination after a single 483 μg intake via a dietary supplement. In six volunteers, urine was collected up to 659 h. LC‐HRMS/MS identified four tentative metabolites; maximum urinary concentrations reached 4 ng/mL within 4–48 h.
O. Krug, A. Thomas, M. Thevis
wiley   +1 more source

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, EarlyView.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

Functional Activity of Enantiomeric Oximes and Diastereomeric Amines and Cyano Substituents at C9 in 3-Hydroxy-N-phenethyl-5-phenylmorphans

Molecules
The synthesis of stereochemically pure oximes, amines, saturated and unsaturated cyanomethyl compounds, and methylaminomethyl compounds at the C9 position in 3-hydroxy-N-phenethyl-5-phenylmorphans provided μ-opioid receptor (MOR) agonists with varied ...
Hudson G. Roth, Madhurima Das, Agnieszka Sulima, Dan Luo, Sophia Kaska, Thomas E. Prisinzano, Andrew T. Kerr, Arthur E. Jacobson, Kenner C. Rice   +8 more
doaj   +1 more source

The Cyano‐Diels–Alder Reaction: From Nitrile Activation to Functional Molecular Architectures

European Journal of Organic Chemistry, EarlyView.
This Concept Article presents the evolution of the cyano‐Diels–Alder reaction from its early examples to its current development as a valuable synthetic tool for the preparation of N‐heterocycles, fused polycycles and functional chromophores, tracing the key breakthroughs that have transformed this underexplored transformation into a relevant platform ...
Giovanni Bottari
wiley   +1 more source

The continuing significance of chiral agrochemicals

Pest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.
In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
wiley   +1 more source

Comprehensive in vitro profiling of traditional and emerging stimulants at monoamine transporters and the 5‐HT2A receptor

British Journal of Pharmacology, EarlyView.
A pharmacological profiling of 58 synthetic stimulants of various classes at dopamine, norepinephrine, and serotonin transporters and the 5‐HT2A receptor, most showing distinct class‐dependent profiles, with some indicating a high abuse potential. Background and Purpose New psychoactive substances (NPSs) often emerge on the illicit drug market with ...
Darta Stalberga, Robert Kronstrand, Bianca Schranz, Nick van Zijl, Sebastian Karlman, Soma Aref, Tobias Rautio, Svante Vikingsson, Mattias Persson, Henrik Green   +9 more
wiley   +1 more source