Results 31 to 40 of about 6,365 (202)

Self-Supported N-Heterocyclic Carbenes and Their Use as Organocatalysts

open access: yesMolecules, 2016
The study of N-heterocyclic carbenes (NHCs) as organocatalysts has proliferated in recent years, and they have been found to be useful in a variety of reactions.
Shuang Ma, Patrick H. Toy
doaj   +1 more source

Citrate trisulfonic acid as a novel, recyclable, and heterogeneous organocatalyst for the one-pot synthesis of 4-iminoquinolines [PDF]

open access: yesJournal of Chemistry Letters, 2023
Citrate trisulfonic acid (CTSA), as a novel, heterogeneous and organocatalyst, was applied for an efficient synthesis of 4-iminoquinolines using 2-aminobenzonitrile, active methylenes and orthoesters under solvent-free conditions.
Elham Kanaani   +2 more
doaj   +1 more source

Site-Selective C-C Modification of Proteins at Neutral pH Using Organocatalyst-Mediated Cross Aldol Ligations [PDF]

open access: yes, 2018
The bioconjugation of proteins with small molecules has proved an invaluable strategy for probing and perturbing dynamic biological mechanisms. The general use of chemical methods for the functionalisation of proteins remains limited however by the ...
Michael, Plevin   +10 more
core   +2 more sources

Molecularly Imprinted Polymers for (Thio)urea Organocatalyst Recovery and Recycling

open access: yes, 2022
The strong binding affinity of carboxylate-based ion pair monomers toward ureas and thioureas (>105 L mol–1 in DMSO-d6) has been utilized to prepare organocatalyst-selective molecularly imprinted polymers for the first time.
Matthew Blair (5132981)   +11 more
core   +1 more source

Design and Synthesis of Helical N-Terminal l-Prolyl Oligopeptides Possessing Hydrocarbon Stapling

open access: yesMolecules, 2020
We designed and synthesized helical short oligopeptides with an l-proline on the N-terminus and hydrocarbon stapling on the side chain. Side-chain stapling is a frequently used method for the development of biologically active peptides.
Atsushi Ueda   +4 more
doaj   +1 more source

Thiourea Organocatalysts as Emerging Chiral Pollutants: En Route to Porphyrin-Based (Chir)Optical Sensing

open access: yesChemosensors, 2021
Environmental pollution with chiral organic compounds is an emerging problem requiring innovative sensing methods. Amino-functionalized thioureas, such as 2-(dimethylamino)cyclohexyl-(3,5-bis(trifluoromethyl)phenyl)thiourea (Takemoto’s catalyst), are ...
Nele Konrad   +13 more
doaj   +1 more source

Cysteine-Derived Organocatalyst in a Highly Enantioselective Intramolecular Michael Reaction

open access: yes, 2016
Asymmetric intramolecular Michael reaction catalyzed by an organocatalyst derived from cysteine has been developed for the synthesis of chiral bicyclo[4.3.0]nonene and cis-disubstituted cyclopentane skeletons with a creation of three or two contiguous ...
Yujiro Hayashi (467585)   +5 more
core   +4 more sources

TBD- or PS-TBD-Catalyzed One-Pot Synthesis of Cyanohydrin Carbonates and Cyanohydrin Acetates from Carbonyl Compounds

open access: yesMolecules, 2016
Cyanation reactions of carbonyl compounds with methyl cyanoformate or acetyl cyanide catalyzed by 5 mol % of 1,5,7-triazabicyclo[4,4,0]dec-5-ene (TBD) were examined.
Satoru Matsukawa   +2 more
doaj   +1 more source

Highly Efficient and Modularly Tuned Bicyclic Organocatalyst for the Enantioselective Michael Addition of Aldehydes to Nitroalkenes

open access: yes, 2011
Highly Efficient and Modularly Tuned Bicyclic Organocatalyst for the Enantioselective Michael Addition of Aldehydes to NitroalkenesA new type of bicyclic organocatalyst has been successfully applied to the asymmetric Michael addition of aldehydes to ...
Lu, Yun-Peng   +5 more
core   +1 more source

Mechanochemical synthesis of poly(trimethylene carbonate)s: an example of rate acceleration

open access: yesBeilstein Journal of Organic Chemistry, 2019
Mechanochemical polymerization is a rapidly growing area and a number of polymeric materials can now be obtained through green mechanochemical synthesis.
Sora Park, Jeung Gon Kim
doaj   +1 more source

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