Results 121 to 130 of about 30,863 (282)
Chemistry – A European Journal, EarlyView.This research presents a novel 1,4‐π‐functionalized calix[6]arene with enhanced interactions with dialkylammonium axles. We investigate threading behavior in CDCl3, highlighting how exo‐rim π‐functionalization affects binding affinity and stereoselectivity.
Veronica Iuliano +7 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.Nitrooxylation—the installation of nitrate esters (–ONO2) has evolved from classical mixed‐acid protocols to catalytic and mechano‐, flow‐, photo‐, and electrochemical strategies. This review delineates ionic and radical manifolds for C–ONO2 bond formation, emphasizing mechanistic control, selected substrate scope, and selectivity.
Jayanta Dey, Dmitry Katayev
wiley +1 more source
Chemistry – A European Journal, EarlyView.First controlled formation of cyanohexatriyne (HC7N) is achieved using a cobalt–alkyne masking strategy that overcomes the intrinsic instability of nitrile‐substituted polyynes. The approach enables spectroscopic validation of HC7N and reveals its pronounced electrophilicity through a selective conjugate addition with diethylamine.
Léa Lefrançois +4 more
wiley +1 more source
Mild C─F Activation of Azido(per)Fluoroalkanes
Chemistry – A European Journal, EarlyView.Mild and selective activation of C(sp3)–F bonds in azido(per)fluoroalkanes using thiolates was developed, leading to novel functionalized azides. The reaction is initiated by nucleophilic attack of the sulfur atom to the terminal nitrogen of the azido group, followed by fluoride ion elimination.
Olena Shaitanova +7 more
wiley +1 more source
DFT Studies on the Stereoselective Three-Component Ugi Reaction
Orbital: The Electronic Journal of Chemistry, 2019 studied theoretically based on DFT calculations. Structures of reagents, products, intermediates, and transition states were optimized at M062X/6-31+g(d,p) level of theory in gas phase and in methanol as a common solvent for this reaction.
Elaheh Sadat Sharifzadeh +1 more
doaj
Stereochemical Control in the Matteson Reaction
Chemistry – A European Journal, EarlyView.The Matteson homologation is a highly versatile method for the stereoselective insertion of carbenoids into boronic esters. Through iterative application of the process, complex chiral molecules can be synthesized. The stereoselectivity of the reaction is determined by a chiral diol incorporated in the boronic ester.
Hae Mo Lee, Christoph Hirschhäuser
wiley +1 more source
Chemistry – A European Journal, EarlyView.Cyclopropylamines have emerged as powerful photocatalytic building blocks. Upon light‐induced single‐electron oxidation, they undergo strain‐release ring opening to generate distonic iminium radicals that enable diverse transformations, including ring‐opening functionalization, formal [3 + 2] cycloadditions, radical cascades, and asymmetric bond ...
Maria Chiara Cabua +3 more
wiley +1 more source
Excitation of acyclic trisubstituted alkenes via triplet energy transfer for diastereo- and enantioselective [2 + 2] photocycloaddition. [PDF]
Nat CommunLong J +5 more
europepmc +1 more source
Chemistry – A European Journal, EarlyView.Charge and orbital control represent fundamental principles in organic chemistry. In this study, these principles are applied to the aldol reactions of a cyclic Ge‐dienolate. By systematically tuning the charge and orbital distributions of the Ge‐dienolates and their aldehyde reaction partners, regio‐ and stereoselective access to three distinct aldol ...
Taishi Nojima +2 more
wiley +1 more source