Results 21 to 30 of about 1,370 (185)

Oxidation of Aryl Alcohols by Morpholinium Fluorochromate(VI) on Silica Gel, a Selective and Efficient Heterogeneous Reagent

E-Journal of Chemistry, 2011
Morpholinium fluorochromate(VI), MFC, is easily synthesized by reacting morpholine to an aqueous solution of CrO3 and HF. This reagent selectively oxidizes aryl alcohols to their corresponding aldehydes and ketones under mild conditions.
S. Zahra Sayyed-Alangi, H. Sajjadi-Ghotbabadi, Mohammed T. Baei, Sahar Naderi   +3 more
doaj   +1 more source

Organocatalytic Enantioselective Addition of Malonates to Cyclic Imines: A Short Total Synthesis of Tetraponerine T‐1

Angewandte Chemie, EarlyView.
A stereoselective functionalization method of cyclic imines under mild organocatalytic conditions was developed. Bifunctional cinchona alkaloid catalysts combined with carefully optimized reaction conditions to suppress background reactivity enabled highly enantio‐ and diastereoselective addition reactions of malonates to cyclic imines.
Frederic Kölblin, Helma Wennemers
wiley   +2 more sources

Organocatalytic asymmetric addition of malonates to unsaturated 1,4-diketones

Beilstein Journal of Organic Chemistry, 2012
The organocatalytic Michael addition of malonates to symmetric unsaturated 1,4-diketones catalyzed by thiourea and squaramide derivatives with Cinchona alkaloids afforded the formation of a new C–C bond in high yields (up to 98%) and enantiomeric ...
Sergei Žari, Tiiu Kailas, Marina Kudrjashova, Mario Öeren, Ivar Järving, Toomas Tamm, Margus Lopp, Tõnis Kanger   +7 more
doaj   +1 more source

SYNTHESIS, CHARACTERIZATION AND THERMAL BEHAVIOUR OF HEAVY TRIVALENT LANTHANIDE MALONATES

Eclética Química, 2018
Solid-state Ln-L compounds, where Ln stands for heavy trivalent lanthanides (Tb-Lu) and L is malonate, have been synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder ...
José Roberto Locatelli, Cláudio Teodoro de Carvalho, Flávio Junior Caires, Massao Ionashiro   +3 more
doaj   +1 more source

Synthesis and Anti-TMV Activity of Dialkyl/dibenzyl 2-((6-Substituted-benzo[d]thiazol-2-ylamino)(benzofuran-2-yl)methyl) Malonates

Molecules, 2013
Starting from benzofuran-2-methanal, 6-substituted benzothiazole-2-amines and malonic esters, sixteen title compounds were designed and synthesized seeking to introduce anti-TMV activity.
Meichuan Li, Zhining Li, Jun Zhao, Ying Xie, Jie Song, Fang Wu, Han Xiao, Pengcheng Zheng, Chenghao Tang   +8 more
doaj   +1 more source

Diastereoselective anodic hetero- and homo-coupling of menthol-, 8-methylmenthol- and 8-phenylmenthol-2-alkylmalonates

Beilstein Journal of Organic Chemistry, 2017
Diastereoselective radical coupling was achieved with chiral auxiliaries. The radicals were generated by anodic decarboxylation of five malonic acid derivatives. These were prepared from benzyl malonates and four menthol auxiliaries.
Matthias C. Letzel, Hans J. Schäfer, Roland Fröhlich   +2 more
doaj   +1 more source

Impact of Carboxyl Groups in Graphene Oxide on Chemoselective Alcohol Oxidation with Ultra-Low Carbocatalyst Loading

Scientific Reports, 2017
A highly efficient and simple chemoselective aerobic oxidation of primary alcohols to either aldehydes or carboxylic acids in the presence of nitric acid was developed, utilising 5 wt% graphene oxide as a carbocatalyst under ambient reaction conditions ...
Yan Cui, Young Hee Lee, Jung Woon Yang
doaj   +1 more source

Nanostructured Deep Eutectic Systems in Healthcare: From Bioactive Solvents to Intelligent Biointerfaces, Wearables, and AI‐Driven Design

Advanced NanoBiomed Research, EarlyView.
Beyond the green solvent paradigm, this review redefines Deep Eutectic Systems (DES) as programmable supramolecular nanoassemblies. We survey their biomedical convergence: stabilizing thermolabile mRNA to enable cold chain‐free logistics, reshaping transdermal microneedle delivery, enabling long‐term wearables via eutectogels, and utilizing Generative ...
Jeesu Moon, Min Seo Kim, Jae‐Seung Lee
wiley   +1 more source

Quantification of N-acetylcysteamine activated methylmalonate incorporation into polyketide biosynthesis

Beilstein Journal of Organic Chemistry, 2013
Polyketides are biosynthesized through consecutive decarboxylative Claisen condensations between a carboxylic acid and differently substituted malonic acid thioesters, both tethered to the giant polyketide synthase enzymes.
Stephan Klopries, Uschi Sundermann, Frank Schulz   +2 more
doaj   +1 more source

Exploitation of knowledge databases in the synthesis of zinc(II) malonates with photo-sensitive and photo-insensitive N,N′-containing linkers

IUCrJ, 2018
Photoinitiated solid-state reactions are known to affect the physical properties of coordination polymers, such as fluorescence and sorption behaviour, and also afford extraordinary architectures (e.g. three-periodic structures with polyorganic ligands).
Ekaterina N. Zorina-Tikhonova, Aleksandr S. Chistyakov, Mikhail A. Kiskin, Aleksei A. Sidorov, Pavel V. Dorovatovskii, Yan V. Zubavichus, Eugenia D. Voronova, Ivan A. Godovikov, Alexander A. Korlyukov, Igor L. Eremenko, Anna V. Vologzhanina   +10 more
doaj   +1 more source