Search
Search Results
-
Chiral Ureas and Thiroureas in Asymmetric Catalysis
After an overview of chiral urea and thiourea synthetic methods, this review describes the main applications of urea and thiourea complexes in...
-
Enantioselective organocatalytic cycloadditions for the synthesis of medium-sized rings
Optically active medium-sized cyclic compounds are often found in natural products and are therefore attractive targets in organic synthesis....
-
Photophysics of perylene monoimide-labelled organocatalysts
We designed and synthesized cinchona alkaloid derivates PMI-BnCPD, 1 and PMI-dHQD, 2 , in which a fluorescent perylene monoimide unit is linked to the...
-
Naturally occurring organic acids for organocatalytic synthesis of pyrroles via Paal–Knorr reaction
AbstractIn this study, common naturally occurring organic acids, namely oxalic, malonic, succinic, tartaric and citric acid (as safe, inexpensive,...
-
N-PEGylated (L)-Prolinamide: A Homogeneous, Solvent-Free, and Recyclable Catalyst for Scalable Enantioselective Aldol Reaction
The unique physicochemical properties of PEG-400 were imparted to ( L )-prolinamide to afford a homogeneous, solvent-free, recyclable organocatalyst...
-
Chiral phosphoric acid-catalyzed enantioselective phosphinylation of 3,4-dihydroisoquinolines with diarylphosphine oxides
Chiral phosphorous-containing compounds are playing a more and more significant role in several different research fields. Here, we show a chiral...
-
An efficient three-component synthetic protocol for the synthesis of structurally diverse spiroannulated benzothiazolopyrimidines catalyzed by l-proline in aqueous media
An environmentally sustainable domino protocol has been presented to synthesize structurally diverse...
-
Catalytic Applications of Vitamin-Supported Nanoparticles in Organic Chemistry
AbstractConsidering the green nature, biocompatibility, novelty, ease of preparation, and unique properties of vitamin-functionalized nanocatalysts,...
-
Asymmetric organocatalysis: from a breakthrough methodology to sustainable catalysts and processes
The evolution of modern catalytic methodologies for asymmetric organic synthesis, including transition metal and organocatalysis, is briefly...
-
Correlation Analysis of Catalytic Activity of Iodonium Salt in the Schiff Reaction
AbstractTo analyze the features of catalysis of the Schiff condensation with an iodonium salt as halogen bond donor, the equilibrium constants and...
-
Preparation of Chemically Recyclable Poly(ether-alt-ester) by the Ring Opening Polymerization of Cyclic Monomers Synthesized by Coupling Glycolide and Epoxides
Polyester and polyether are two key oxygenated polymers, and completely alternative sequence of poly(ester- alt -ether) could efficiently combine the...
-
Novel chiral Tetraazacalix[4]arene[2]triazine-based derivatives as catalysts: enantioselective Michael reaction of nitroolefins and diketones
A novel derivatives of tetraazacalix[4]arene[2]triazine-based catalysts for enantioselective Michael addition reactions of nitroolefins and diketones...
-
-
Recent advances in cycloaddition of CO2 with epoxides: halogen-free catalysis and mechanistic insights
The atom-economical cycloaddition of CO 2 with epoxides to synthesize cyclic carbonates is a promising route for valuable utilization of CO 2 ....
-
Progress in Catalytic Ring-Opening Polymerization of Biobased Lactones
Polymers that can be extracted or manufactured from renewable resources such as sugars, natural acids, or terpenes are increasingly relevant. In this...
-
Ascorbic acid as a multifunctional hydrogen bonding catalyst for Paal–Knorr synthesis of N-substituted mono- and bis-pyrroles: experimental and theoretical aspects
Ascorbic acid could be applied as a recyclable organocatalyst for the preparation of pyrroles via Paal–Knorr condensation of hexane-2,5-dione with...
-
Poly(ether)s derived from oxa-Michael polymerization: a comprehensive review
Poly(ether)s represent an important class of polymers and are typically formed by ring-opening polymerization, Williamson ether synthesis, or...
-
Recent advances in enantioselective ring-opening polymerization and copolymerization
Precisely controlling macromolecular stereochemistry and sequences is a powerful strategy for manipulating polymer properties. Controlled synthetic...
-
Effect of Calix[4]arene as a Hydrophobic Substituent on Proline Catalysis of Direct Asymmetric Aldol Reactions in the Presence of Water
AbstractA new organocatalyst trans -4-hydroxy-L-proline-derived calix[4]arene was synthesized and its catalyst performance for the direct asymmetric...
-
Recent Advances in the Synthesis of Covalent Organic Frameworks for Heterogeneous Catalysis
Covalent organic frameworks (COFs) are periodically well-organized polymeric skeletons of organic monomer units connected through strong covalent...