Results 31 to 40 of about 848,132 (406)
Asymmetric additions to dienes catalysed by a dithiophosphoric acid. [PDF]
, 2011 Chiral Brønsted acids (proton donors) have been shown to facilitate a broad range of asymmetric chemical transformations under catalytic conditions without requiring additional toxic or expensive metals.
Hamilton, Gregory +4 more
core +2 more sources
Recycling in Asymmetric Catalysis [PDF]
Accounts of Chemical Research, 2016 Cyclic reaction networks consisting of an enantioselective product-forming step and a reverse reaction of the undesired enantiomer back to starting reactant are important for the generation of compounds with high enantiomeric purity. In order to avoid an equilibrium racemic state, a unidirectional cyclic process where product formation and regeneration
openaire +3 more sources
Phase transition and critical end point driven by an external magnetic field in asymmetric quark matter [PDF]
, 2014 The location of the critical end point (CEP) in the QCD phase diagram is determined under different scenarios. The effect of strangeness, isospin/charge asymmetry and an external magnetic field is investigated.
Costa, Pedro +4 more
core +7 more sources
Total Synthesis of Natural Terpenoids Enabled by Cobalt Catalysis
Frontiers in Chemistry, 2022 Transition metal catalysis plays an essential role in the total synthesis of natural products. Cobalt-mediated asymmetric catalysis has successfully been used as a primary or a secondary step in the total synthesis of natural products, especially ...
Shu Xiao +6 more
doaj +1 more source
Kinetic Resolution in Asymmetric Epoxidation using Iminium Salt Catalysis [PDF]
, 2013 The first reported examples of kinetic resolution in epoxidation reactions using iminium salt catalysis are described, providing up to 99% ee in the epoxidation of racemic cis ...
Allin, Steven M. +7 more
core +1 more source
Dynamical Clustering Interrupts Motility Induced Phase Separation in Chiral Active Brownian Particles [PDF]
J. Chem. Phys., 156, 021102 (2022), 2021 One of the most intriguing phenomena in active matter has been the gas-liquid like motility induced phase separation (MIPS) observed in repulsive active particles. However, experimentally no particle can be a perfect sphere, and the asymmetric shape, mass distribution or catalysis coating can induce an active torque on the particle, which makes it a ...
arxiv +1 more source
Journal of the American Chemical Society, 2020 Direct synthesis, post-synthetic modification and chiral induction have been recognized as three powerful methods to syn-thesize chiral covalent organic frameworks (CCOFs).
Jian-Cheng Wang +4 more
semanticscholar +1 more source
Hydrazones as Singular Reagents in Asymmetric Organocatalysis [PDF]
, 2016 This Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in nucleophile–electrophile, cycloaddition, and cyclization reactions.
Fernández Fernández, Rosario Fátima +4 more
core +1 more source
Green Synthesis and Catalysis, 2021 We reported a synergistic Pd/Cu catalyzed enantioselective decarboxylative allylation of vinylethylene carbonates with glycine iminoesters, which provides facile access to non-proteinogenic diverse trisubstituted allylic amino acid derivatives in high ...
Miaolin Ke +4 more
doaj
JCAP 08 (2017) 021, 2017 Recently it was shown that dark matter with mass of order the weak scale can be charged under a new long-range force, decoupled from the Standard Model, with only weak constraints from early Universe cosmology. Here we consider the implications of an additional charged particle $C$ that is light enough to lead to significant dissipative dynamics on ...
arxiv +1 more source