Results 91 to 100 of about 22,861 (258)
Peripheral Arylation of Subporphyrazines
Chemistry – A European Journal, 2013 AbstractPeripherally hexaarylated subporphyrazines (SubPzs) have been prepared through a Pd‐catalyzed, CuTC‐mediated coupling of a hexaethylsulfanylated subporphyrazine with arylboronic acids. The introduced aryl substituents strongly influence the electronic properties of the subporphyrazine through effective conjugative interaction.
Higashino T. +3 more
openaire +3 more sources
Metal-free formal synthesis of phenoxazine
Beilstein Journal of Organic Chemistry, 2018 A transition metal-free formal synthesis of phenoxazine is presented. The key step of the sequence is a high-yielding O-arylation of a phenol with an unsymmetrical diaryliodonium salt to provide an ortho-disubstituted diaryl ether.
Gabriella Kervefors +3 more
doaj +1 more source
Arylation with Bismuthonium Salts [PDF]
, 2021 Organobismuth reagents have been employed as electrophilic arylating agents since the 1980s, but both their synthesis and use in arylation reactions suffer from poor atom economy.
Maggi, Lorenzo
core
Photosensitizing Au(I) Catalysis With Coumarins
Chemistry – A European Journal, EarlyView.A Au(I) complex with a tethered coumarin fragment was synthesized and characterized by UV‐vis and emission spectroscopy. Its ability to facilitate photo‐driven cross‐coupling reactions through single‐electron and energy transfer events was evaluated. ABSTRACT Gold catalysis shows versatility in a wide range of challenging transformations, wherein light‐
Liliana Capulín Flores +2 more
wiley +1 more source
(R)-(−)-2-[(5-Oxido-5-phenyl-5λ4-isoquino[4,3-c][2,1]benzothiazin-12-yl)amino]benzonitrile
Molbank, 2014 Copper-catalyzed cross-coupling between (S)-S-methyl-S-phenylsulfoximine (1) and 2-iodobenzonitrile (2) resulted in the discovery of an unprecedented one-pot triple arylation sequence to give (R)-(−)-2-[(5-oxido-5-phenyl-5λ4-isoquino[4,3-c][2,1 ...
Marcus Frings +2 more
doaj +1 more source
Palladium-catalyzed selective oxidative olefination and arylation of 2-pyridones
, 2012 Substrate-controlled selective oxidative olefination of N-protected 2-pyridones has been achieved under palladium catalysis. The 5-position selectivity was followed for N-protected simple pyridones.
李兴伟 +4 more
core +1 more source
Chemistry – A European Journal, EarlyView.Quinolin‐4‐ones were converted to chloroquinolinium salts, allowing formation of axially chiral aminoquinolinium salts via an enantioretentive SNAr reaction with a variety of amine nucleophiles. The salts have a high rotational barrier, with a racemization half‐life of ∼1000s of years.
Darren Holmes +5 more
wiley +1 more source
Synthesis of 9-O-arylated berberines via copper-catalyzed CAr–O coupling reactions
Beilstein Journal of Organic Chemistry, 2019 Berberine is a widely used antimicrobial agent in clinic. However, a high dosage is often required due to its low lipophilicity and bioavailability. The current study explores the structural modifications of berberines with potentially lipophilic aryl ...
Qiaoqiao Teng +5 more
doaj +1 more source
Chemistry – A European Journal, EarlyView.Hybrid macrocyclic peptides unite genetically encoded peptide libraries with the structural complexity of synthetic small molecules. This Review critically analyzes phage‐compatible cyclization and diversification chemistries, highlights emerging opportunities beyond traditional cysteine‐based approaches, and outlines how future advances may enable the
Titia Rixt Oppewal, Clemens Mayer
wiley +1 more source
Chiral Pyrazolinylidene Complexes for Asymmetric Catalysis
Chemistry – A European Journal, EarlyView.The synthesis and application of pyrazolin‐5‐ylidene NHC chiral‐at‐ruthenium catalysts is reported. The strong donating pyrazolin‐5‐ylidene ligands led to highly electron rich ruthenium complexes, which showed excellent catalytic activity and enantioselectivity in the intramolecular aziridination of an alkene.
Felix Möller +6 more
wiley +1 more source