Results 21 to 30 of about 109,430 (294)
Supramolecular asymmetric catalysis mediated by crown ethers and related recognition systems
Green Synthesis and Catalysis, 2021 In the past decades, the combination of supramolecular chemistry and catalysis has pushed forward the emergence of supramolecular catalysis as an intersectant and challenging research field.
Zibin Zhang +5 more
doaj +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
iScience, 2018 Summary: Chiral syn-1,3-diols are fundamental structural motifs in many natural products and drugs. The traditional Narasaka-Prasad diastereoselective reduction from chiral β-hydroxyketones is an important process for the synthesis of these ...
Guanxin Huang +7 more
doaj +1 more source
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
Multifunctional Asymmetric Catalysis.
Chemical and Pharmaceutical Bulletin, 2001 Two types of general and practical enantioselective catalysts, namely, bimetallic complexes and Lewis acid-Lewis base bifunctional catalysts were developed based on the concept of multifunctional catalysis. In the first part of this review, the first example of a catalytic enatioselective nitro-Mannich reaction as well as a direct catalytic ...
M, Shibasaki, M, Kanai
openaire +3 more sources
Stereodivergent, Diels-Alder-initiated organocascades employing α,β-unsaturated acylammonium salts: scope, mechanism, and application. [PDF]
, 2017 Chiral α,β-unsaturated acylammonium salts are novel dienophiles enabling enantioselective Diels-Alder-lactonization (DAL) organocascades leading to cis- and trans-fused, bicyclic γ- and δ-lactones from readily prepared dienes, commodity acid chlorides ...
Abbasov, Mikail E +3 more
core +2 more sources
Application of MOFs in asymmetric catalysis
上海师范大学学报. 自然科学版, 2023 So far, metal-organic frameworks(MOFs) have been developed in many fields, including gas adsorption, catalysis, and other directions. In recent years, due to the rapid development of asymmetric catalysis, chiral MOFs in stereoselective catalysis has ...
ZHANG Xiang, TAN Chunxia, LIN Jingrong
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
Asymmetric Ion‐Pairing Catalysis [PDF]
Angewandte Chemie International Edition, 2012 AbstractCharged intermediates and reagents are ubiquitous in organic transformations. The interaction of these ionic species with chiral neutral, anionic, or cationic small molecules has emerged as a powerful strategy for catalytic, enantioselective synthesis.
Brak, Katrien, Jacobsen, Eric
openaire +3 more sources
Dynamic Kinetic Resolution of Hetero biaryl Ketones by Zinc- Catalyzed Asymmetr ic Hydrosil ylation [PDF]
, 2019 Adiastereo- and highly enantioselective dynamic kinetic resolution (DKR) of configurationally labile hetero- biaryl ketones is described. The DKR proceeds by zinc- catalyze dhydrosilylation of the carbonyl group ,thus leading to ...
Carmona, José A. +6 more
core +1 more source