Results 21 to 30 of about 2,457 (204)
Journal of Saudi Chemical Society, 2017 Potassium phthalimide (PPI) is employed as an efficient and effective basic organocatalyst for the one-pot three-component reaction of β-oxoesters with hydroxylamine hydrochloride and various aromatic aldehydes.
Hamzeh Kiyani, Fatemeh Ghorbani
doaj +1 more source
Starch nanoparticles as a bio-nanocatalyst in synthesis of diheteroaryl thioethers
Journal of Saudi Chemical Society, 2019 Nanostarch is shown to be a highly efficient, eco-friendly and heterogenous organocatalyst for the synthesis of the diheteroaryl thioethers via one-pot reaction of methylcarbonyls, thiourea and iodine in DMSO.
Homeyra Rostami Monjezi +2 more
doaj +1 more source
Self-Supported N-Heterocyclic Carbenes and Their Use as Organocatalysts
Molecules, 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]
Journal 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
Angewandte Chemie, EarlyView.This review highlights recent advances in integrating biocatalysis and chemocatalysis in continuous flow to create streamlined, sustainable processes. It examines chemo‐enzymatic cascades combining at least one enzymatic and one chemical step, discusses challenges such as enzyme immobilization, leaching, and reactor clogging, and presents solutions ...
Petros Siasiaridis +2 more
wiley +2 more sources
Angewandte Chemie, EarlyView.A catalytic network embedding a formal rearrangement enables the first catalytic enantioselective multicomponent reaction (MCR) of sulfur ylides. In the presence of a bulky chiral phosphoric acid, the reaction combines sulfoxonium ylides, aldehydes and thiols, and affords synthetically versatile β‐hydroxy‐α‐sulfanyl carbonyl compounds in ...
Nicolò Santarelli +10 more
wiley +2 more sources
Design and Synthesis of Helical N-Terminal l-Prolyl Oligopeptides Possessing Hydrocarbon Stapling
Molecules, 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
Chemosensors, 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
Asymmetric Iron‐Catalyzed Vicinal C(sp3)─H Diamination of Carboxylic Acids
Angewandte Chemie, EarlyView.An iron‐catalyzed vicinal α,β‐C(sp3)─H diamination of readily available carboxylic acids furnishes chiral α,β‐diamino acids in a single pot with high regio‐, diastereo‐, and enantioselectivity (up to >20:1 dr and >99% ee). ABSTRACT The direct construction of chiral 1,2‐diamines through the stereoselective functionalization of two vicinal C(sp3)─H bonds
Bing Zhou +5 more
wiley +2 more sources
Cyclo‐Polyproline: Chameleonic All‐Peptide Macrocycles With Induced‐Fit Host‐Guest Recognition
Angewandte Chemie, EarlyView.Macrocycles served as the genesis of supramolecular chemistry, advancing synthetic, separation, and materials fields. Despite their utility, they typically lack synthetic control. This work establishes a robust platform for all‐peptide macrocycles capable of host‐guest complexation and chameleonic behavior.
Camilla Di Girolamo +9 more
wiley +2 more sources