Results 91 to 100 of about 29,358 (323)

An Alkyne Diboration/6π-Electrocyclization Strategy for the Synthesis of Pyridine Boronic Acid Derivatives. [PDF]

, 2016
A new and efficient synthesis of pyridine-based heteroaromatic boronic acid derivatives is reported through a novel diboration/6π-electrocyclization strategy.
Adams, Bachollet, Brown, Chong, Colby, Crépin, Del Grosso, Faizi, Gandon, Hilt, Hosokawa, Huang, Ishiyama, Ishiyama, Karabatsos, Kumemura, Liu, Markey, Martin, Mkhalid, Parthasarathy, Prokopcová, Wang, Warner, Yamamoto   +24 more
core   +2 more sources

One‐Step Aqueous Synthesis of Glycosyl Pyridinium Salts, Electrochemical Study, and Assessment of Utility as Precursors of Glycosyl Radicals Using Photoredox Catalysis

ChemistryOpen, EarlyView.
Unprotected glycosyl pyridinium salts may be accessed in a single step from the corresponding unprotected sugar in aqueous solution. Whilst meta‐ and para‐substitution is well tolerated, ortho substitution of the N‐heterocycle inhibits product formation. Electrochemical studies revealed reduction potentials in the range of −0.9 to −1.4 V.
Daniel Chong, Paula A. Brooksby, Antony J. Fairbanks   +2 more
wiley   +1 more source

Rapid Methylation of Aryl Bromides Using Air‐Stable DABCO‐Bis(Trimethylaluminum) via Nickel Metallaphotoredox Catalysis

Angewandte Chemie, Volume 137, Issue 33, August 11, 2025.
Herein, we report the use of bis(trimethylaluminum)‐1,4‐diazabicyclo[2.2.2]octane (DABAl‐Me3) as practical source of radicals for the introduction of valuable methyl groups to aryl bromides via a Nickel/metallaphotocatalytic cross coupling strategy.
Jonas Djossou, Andrea Aloia, Luca Capaldo, Demi D. Snabilié, Morgan Regnier, Jasper H.A. Schuurmans, Antonio Monopoli, Bas de Bruin, Timothy Noël   +8 more
wiley   +2 more sources

Synthesis of Some Novel 11b-Substituted Pyrimido[6,1-a]-isoquinoline Derivatives

Molecules, 2004
A series of novel 11b-substituted 1,6,7,11b-tetrahydropyrimido[6,1-a]- isoquinoline-2,4-diones and 4-thioxo-1,3,4,6,7,11b-hexahydropyrimido[6,1-a]isoquinolin-2- ones were synthesized, utilizing two alternative strategies for ring closure of ...
Atanas P. Venkov, Iliyan I. Ivanov, Plamen A. Angelov   +2 more
doaj   +1 more source

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

, 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  

Experimental and Theoretical Evidence for Nitrogen-Fluorine Halogen Bonding in Silver-Initiated Radical Fluorinations [PDF]

, 2019
We report experimental and computational evidence for nitrogen–fluorine halogen bonding in Ag­(I)-initiated radical C–H fluorinations. Simple pyridines form [N–F–N]+ halogen bonds with Selectfluor to facilitate single-electron reduction by catalytic Ag ...
Baker, Sarah I, Baxter, Ryan D, Bidwell, Samantha L, Hratchian, Hrant P, Hua, Alyssa M   +4 more
core   +5 more sources

Visible Light–Induced Decarboxylative Radical Addition of Heteroaromatic Carboxylic Acids to Alkenes at Room Temperature in Two‐Molecule Photoredox System

ChemistryOpen, EarlyView.
The photoinduced decarboxylative radical addition of aryl carboxylic acids, including heteroaromatic carboxylic acids, to electron‐deficient alkenes is achieved in a two‐molecule photoredox system using a combination of biphenyl and 9,10‐dicyanoanthracene without heating or base.
Daisuke Suzuki, Ryoga Hashimoto, Toshiki Furutani, Mugen Yamawaki, Hirotsugu Suzuki, Yasuharu Yoshimi   +5 more
wiley   +1 more source

Synthesis and Fluorescent Properties of Novel Isoquinoline Derivatives

Molecules, 2019
Isoquinoline derivatives have attracted great interest for their wide biological and fluorescent properties. In the current study, we focused on the synthesis of a series of novel isoquinoline derivatives substituted at position 3 of the heteroaromatic ...
Łukasz Balewski, Franciszek Sączewski, Maria Gdaniec, Anita Kornicka, Karolina Cicha, Aleksandra Jalińska   +5 more
doaj   +1 more source

Alkaloidszármazékok szintézise = Synthesis of alkaloid derivatives [PDF]

, 2009
a) Elsőként alkalmaztunk 3-nitrokromén-származékokat 2 pi komponensként azometin-ilidek 1,3-dipoláris cikloaddíciójában b) Új, egyedényes eljárást dolgoztunk ki hexahidro-pirrolo[2,1-a]izokinolinok előállítására c) Új azepin gyűrűt tartalmozó ...
Nyerges, Miklós, Pintér, Áron, Toke, László, Virányi, Andrea   +3 more
core  

Dynamic assembly of a zinc-templated bifunctional organocatalyst in the presence of water for the asymmetric aldol reaction [PDF]

, 2015
A bifunctional organocatalytic system consisting of simple pyridine ligands containing separate catalytic functionalities was assembled using ZnCl2.
Alfonso, Ignacio, Jimeno, Ciril, Serra-Pont, Anna, Solà Oller, Jordi   +3 more
core   +1 more source