Results 131 to 140 of about 61,221 (238)
Synthesis of Glycerol-Based Pyridinium Surfactants and Appraisal of Their Properties
, 2016 β-Bromo glycerol monoethers, when heated with pyridine at 100 °C for 10 h, gave a new glycerol-based pyridinium cationic surfactant, 1-(1-(2,3-dihydroxypropoxy)alkane-2-yl)pyridinium bromide (6a−10a)/1-(2-(2,3-dihydroxypropoxy)alkyl)pyridinium bromide ...
Sukhprit Singh (1636654) +4 more
core +1 more source
Selective N‐Functionalization of Pyrazoles
European Journal of Organic Chemistry, EarlyView.This review traces the evolution of regioselective N‐functionalization strategies for pyrazoles, a key class of nitrogen heterocycles widely used in medicinal chemistry. Due to rapid tautomerism, N‐functionalization often lacks selectivity, leading to poor and unpredictable regioisomeric outcomes.
Lucas Popek +2 more
wiley +1 more source
Bromonitroalkanes in Organic Synthesis
European Journal of Organic Chemistry, EarlyView.α,α‐Bromonitroalkanes (BNAs) exhibit chameleon‐like reactivity, serving as carbene, radical, carbanion, and carbocation synthons. This mini‐review summarizes the different reaction modes and highlights recent developments in thermal and photochemical processes. α,α‐Bromonitroalkanes (BNAs) exhibit chameleon‐like reactivity, serving as carbene, radical,
Magdalena Koch, Oliver Reiser
wiley +1 more source
Pyridinium-activated alkyne-based spontaneous amino-yne click polymerization toward n-pi conjugated polyelectrolytes [PDF]
Thanks to its high efficiency, excellent selectivity, simple operation and mild reaction conditions, the click polymerization has become a powerful tool for the synthesis of polymers.
Ben Zhong, Tang +4 more
core +2 more sources
Ionic liquids: structure–toxicity relationships, predictive toxicology, and sustainable design
Journal of Chemical Technology &Biotechnology, EarlyView.Abstract Ionic liquids (ILs) have often been described as green alternatives to conventional solvents because of their negligible vapor pressure and highly tunable properties. However, low volatility does not necessarily translate into environmental safety, as their biological and ecological effects are strongly influenced by molecular structure.
Letícia Zanchet +5 more
wiley +1 more source
, 2017 To enable a comparison between a C—H...X hydrogen bond and a halogen bond, the structures of two fluorous-substituted pyridinium iodide salts have been determined.
Hsing-Fang Chiang +5 more
core +1 more source
Journal of Heterocyclic Chemistry, EarlyView.One‐pot gold(I)‐catalysts synthesis was developed in order to prepare N‐alkenyl 2‐pyridonyl azides. This method provides a series of N‐alkenyl 2‐pyridonyl azides in moderate to excellent yields (up to 94%). ABSTRACT A novel strategy, involving the preparation of gold‐catalyzed cyclization salts and the rearrangement of these salts in the presence of ...
Ali Osman Karatavuk
wiley +1 more source
Mass Spectrometry Reviews, EarlyView.ABSTRACT The use of MALDI mass spectrometry for the analysis of carbohydrates and glycoconjugates is a well‐established technique and this comprehensive review is the twelfth update of the original article published in 1999 and brings coverage of the literature to the end of 2024.
David J. Harvey
wiley +1 more source
Synthesis of highly stabilized ylides from N-[2-(1,3-benzazolylmethyl)]pyridinium salts
, 1990 A series of new stable ylides has been synthesized by the reaction of N-[2-(1,3-benzazolylmethyl)]-pyridinium salts with electrophiles such as carbon disulphide, isothiocyanate derivatives, phenylisocyanate and benzoyl chloride in a two-phase system ...
Álvarez-Builla Gómez, Julio +5 more
core +1 more source
Small, EarlyView.This Review presents a cross‐scale framework for single‐atom catalysts, spanning in‐plane and out‐of‐plane coordination; primary coordination, secondary‐sphere interactions, through‐space microenvironments and support interfaces; individual sites and macroscopic architectures; and static design and directed dynamic reconstruction.
Dazhi Yao +4 more
wiley +1 more source