Results 31 to 40 of about 12,256 (221)

Magnetic nanoparticle-supported organocatalysis

open access: yesGreen Processing and Synthesis, 2013
Magnetic nanoparticle (MNP)-supported catalysis is a new method to facilitate catalyst separation and reuse. This technique has recently been introduced for organocatalysis.
Huang Yibo, Zhang Wei
doaj   +1 more source

Asymmetric additions to dienes catalysed by a dithiophosphoric acid. [PDF]

open access: yes, 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

Stimuli‐Responsive Silsesquioxane Nanozymes for Organocatalysis in Water and Prodrug Activation in Cells

open access: yesAngewandte Chemie, EarlyView.
Amino‐bearing silsesquioxanes are water‐stable nanozymes that exhibit aggregation‐ and disaggregation‐dependent catalysis and can be applied to intracellular prodrug activation for cancer therapy. ABSTRACT Synthetic nanozymes have emerged as promising alternatives to natural enzymes for catalytic and therapeutic applications, yet their limited ...
Rabia Zahid   +4 more
wiley   +2 more sources

Desymmetrization of N-Cbz glutarimides through N-heterocyclic carbene organocatalysis

open access: yesNature Communications, 2022
Desymmetrization of achiral building blocks is one of the most efficient ways to access enantiopure compounds of synthetic relevance. Here, the authors desymmetrize glutarimides with alcohols via an imide C–N bond cleavage under NHC organocatalysis.
Zhouli Hu   +12 more
doaj   +1 more source

One-Pot Synthesis of Dioxime Oxalates

open access: yesMolbank, 2022
Dioxime oxalates, a type of carbonyl oximes, are well-known as clean sources of iminyl radicals that undergo key organic chemistry transformations. A series of dioxime oxalates is reported in this manuscript, obtained by the reaction of the corresponding
Laura Adarve-Cardona   +3 more
doaj   +1 more source

The aza-Morita-Baylis-Hillman reaction of electronically and sterically deactivated substrates. [PDF]

open access: yes, 2012
The aza-Morita–Baylis–Hillman (azaMBH) reaction has been studied for electronically and sterically deactivated Michael acceptors. It is found that electronically deactivated systems can be converted with electron-rich phosphanes and pyridines as ...
Abermil   +71 more
core   +1 more source

N-heterocyclic germylenes: structural characterisation of some heavy analogues of the ubiquitous N-heterocyclic carbenes [PDF]

open access: yes, 2019
The X-ray crystal structures of three N-heterocyclic germylenes (NHGes) have been elucidated including the previously unknown 1,3-bis(2,6-dimethylphenyl)diazagermol-2-ylidene (1).
Dodds, Christopher A.   +2 more
core   +2 more sources

Non-Covalent Organocatalyzed Domino Reactions Involving Oxindoles: Recent Advances

open access: yesMolecules, 2017
The ubiquitous presence of spirooxindole architectures with several functionalities and stereogenic centers in bioactive molecules has been appealing for the development of novel methodologies seeking their preparation in high yields and selectivities ...
Tecla Gasperi   +3 more
doaj   +1 more source

Stereodivergent, Diels-Alder-initiated organocascades employing α,β-unsaturated acylammonium salts: scope, mechanism, and application. [PDF]

open access: yes, 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

Organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium or azolium enolates [PDF]

open access: yes, 2014
This tutorial review highlights the organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium/azolium enolates.
Morrill, Louis C., Smith, Andrew D.
core   +1 more source

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