Results 31 to 40 of about 1,271 (129)

A Simple, Proficient and Green Approach for the Synthesis of 1,8-Dioxo-octahydroxanthenes Catalyzed by Cerium(IV) Ammonium Nitrate in Aqueous Media

Orbital: The Electronic Journal of Chemistry, 2014
Various biologically important 1,8-dioxo-“octahydroxanthene derivatives” have been efficiently synthesized in excellent yields using catalytic amounts of cerium(IV) ammonium nitrate (CAN) in water.
Shitole Nana Vikram, Nana V. Shitole, Gopal K. Kakde   +2 more
doaj   +1 more source

A Review on Green Synthetic Approaches in the Development of Quinoline Analogues

ChemistrySelect, Volume 11, Issue 33, 1 September 2026.
This review highlights recent advances in environmentally friendly approaches, including metal‐free systems, solvent‐free approaches, microwave, and ultrasonic‐assisted techniques, organo‐ and biocatalysis, ionic liquids, nanoparticle catalysis, electrochemical, and photocatalytic strategies for the synthesis of quinoline scaffolds.
Demis Zelelew, Ajay Bissessur, Parvesh Singh, Hogantharanni Govender   +3 more
wiley   +1 more source

A facile microwave assisted one-pot synthesis of novel 1-methylhexahydroquinazolin-5(6H)-ones and bis-1-methylhexahydroquinazolin-5(6H)-ones

Orbital: The Electronic Journal of Chemistry, 2011
Novel hexahydroquinazolin-5(6H)-ones 3a-j have been synthesized in good yields by the reaction of enaminones 2a-b with primary amines and formaldehyde under the influence microwaves.
Madhusudhan Saha, Enamul Karim, Jai Narain Vishwakarma, Rishanlang Nongkhlaw   +3 more
doaj   +1 more source

Synthesis and Structural Study of Iodonium Ylides Derived From 2‐Iodosylbenzenesulfonic Acid: Reagents for Preparation of Annulated Thiazoles

European Journal of Organic Chemistry, Volume 29, Issue 32, 24 August 2026.
New ylides of two different types were prepared by reaction of 2‐iodosylbenzenesulfonic acid with the corresponding 1,3‐cyclohexanediones under acidic or basic conditions. These compounds have a typical for iodonium ylides structure with the CIC angles 94.18° –97.25° and the IC bond distances between 2.08 and 2.13 Å.
Dmitry M. Noskov, Matvey K. Shurikov, Irina A. Mironova, Natalia S. Soldatova, Akira Yoshimura, Akio Saito, Mekhman S. Yusubov, Viкtor V. Zhdankin   +7 more
wiley   +1 more source

A green and efficient method for the synthesis of homodimeric (β-dicarbonyl) arylmethanes and dihydropyridine from dimedone in water [PDF]

, 2018
A direct method has been developed for the synthesis of the dihydropyridine ring system by means of Michael reaction. The reaction of dimedone with 1 .0 equiv. of amines in water provides intermediate product, which allowed dihydropyridine derivatives by
Bayou-Khie, N, Grau, S.G., Hoffmann, P, Fodili, M, Amari, M   +4 more
core   +1 more source

Regioselectivity in the multicomponent reaction of 5-aminopyrazoles, cyclic 1,3-diketones and dimethylformamide dimethylacetal under controlled microwave heating

Beilstein Journal of Organic Chemistry, 2012
The multicomponent reaction of 5-aminopyrazole derivatives with cyclic 1,3-dicarbonyl compounds and dimethylformamide dimethylacetal (DMFDMA) in DMF at 150 °C under controlled microwave heating afforded regioselectively 8,9-dihydropyrazolo[1,5-a ...
Kamal Usef Sadek, Ramadan Ahmed Mekheimer, Tahany Mahmoud Mohamed, Moustafa Sherief Moustafa, Mohamed Hilmy Elnagdi   +4 more
doaj   +1 more source

Improved Incorporation of Arylglycines Into Ramoplanin Sequences via Solid‐Phase Peptide Synthesis

European Journal of Organic Chemistry, Volume 29, Issue 30, 12 August 2026.
The incorporation of arylglycines using solid‐phase peptide synthesis remains challenging due to the sensitivity of these residues for epimerization. Here, exploring multiple conditions for the incorporation of arylglycine residues into peptides using SPPS demonstrates how small changes to current synthesis protocols can lead to significant ...
Edward Marschall, Sam Tucker, Max J. Cryle, Julien Tailhades   +3 more
wiley   +1 more source

Isotope Effect in the Reaction of 14C-Formaldehyde with Dimedone

, 1952
Formulae for the specific activity of a labelled product at any stage in a reaction which involves an " isotope effect " are discussed. The investigation of isotope effect by isolating a labelled product in consecutive fractions is illustrated by the ...
AM Downes
core   +1 more source

Alum promoted synthesis of 2H-indazolo[2,1-b]phthalazinetrione derivatives in water

Orbital: The Electronic Journal of Chemistry, 2012
A new and efficient synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-trione derivatives from the three-component condensation reaction of phthalhydrazide, dimedone, and aromatic aldehydes using alum [KAl(SO4)2.12H2O] as catalyst was ...
Balaji Rajendra Madje, Jagdish V. Bharad, Milind B. Ubale, Murlidhar S. Shingare   +3 more
doaj   +1 more source

The impact of physiological oxidants on triggering amyloid formation of the cell cycle regulator protein p16INK4A

Protein Science, Volume 35, Issue 8, August 2026.
Abstract The tumor suppressor protein p16INK4a plays a key role in cell cycle control and is frequently inactivated in human cancers. We previously discovered that oxidation of its single cysteine residue induces a structural transition from the functional monomeric form into inactive amyloid fibrils.
Briana R. Smith, Nicholas J. Magon, Aakriti Sethi, Shelby G. Gray, Sarah G. Heath, Vanessa K. Morris, Christoph Göbl   +6 more
wiley   +1 more source