Results 21 to 30 of about 17,548 (151)

Advances in the greener synthesis of chromopyrimidine derivatives by a multicomponent tandem oxidation process

Scientific Reports, 2023
A hydrophilic cobalt/copper heterogeneous bimetallic catalyst named mTEG-CS-Co/Cu-Schiff-base/IL was successfully synthesized from chitosan polysaccharide.
Pouya Ghamari Kargar, Ghodsieh Bagherzade   +1 more
doaj   +1 more source

Impact of the coffee berry borer on the volatile and semi-volatile compounds; qualitative profile of Coffea arabica berries

Food Chemistry Advances, 2023
One of the main attributes that highlight the final quality of a gourmet cup of coffee is its aroma. Aromas vary according to a variety of plant and environmental variables, among others.
Claudia Patricia Ruiz-Diaz, José C. Verle Rodrigues, Erick Miro-Rivera, Liz M. Diaz-Vazquez   +3 more
doaj   +1 more source

Iron (III)-schiff base immobilized on porous silica and magnetite: a comparison study for oxidation of benzylic alcohols and sulfides [PDF]

شیمی کاربردی روز
The iron (III) Schiff base complex was immobilized on magnetic silica as well as mesoporous silica substrates and characterized by XRD, TEM, FT-IR, AAS, VSM techniques, and in the case of mesoporous silica, it was also identified with N2 adsorption ...
Mona Rajaee, reihaneh Malakooti, Somayye Hadizade, Aliyeh Feghhi   +3 more
doaj   +1 more source

A Lewis acid-promoted Pinner reaction

Beilstein Journal of Organic Chemistry, 2013
Carbonitriles and alcohols react in a Lewis acid-promoted Pinner reaction to carboxylic esters. Best results are obtained with two equivalents of trimethylsilyl triflate as Lewis acid.
Dominik Pfaff, Gregor Nemecek, Joachim Podlech   +2 more
doaj   +1 more source

Silver Nanoparticles Densely Grafted with Nitroxides as a Recyclable Green Catalyst in the Selective Oxidation of Alcohols

Nanomaterials, 2022
The selective oxidation of alcohols, leading to appropriate aldehydes, is widely recognised as one of the most important reactions in organic synthesis.
Agnieszka Krogul-Sobczak, Natalia Pisarek, Piotr Cieciórski, Elżbieta Megiel   +3 more
doaj   +1 more source

Polyvinylpyrrolidone-bromine complex: An efficient polymeric reagent for selective preparation of benzyl bromides in the presence of hexamethyldisilane

Bulletin of the Chemical Society of Ethiopia, 2012
Benzylic bromides were conveniently obtained in high yields via the reaction of the corresponding alcohols with crosslinked polyvinylpyrrolidone-bromine complex (PVPP-Br2)/hexamethyldisilane in chloroform at reflux condition.
Moslem M. Lakouraj, Masoud Mokhtary
doaj  

Green Synthesis of Diphenyl‐Substituted Alcohols Via Radical Coupling of Aromatic Alcohols Under Transition‐Metal‐Free Conditions

ChemistryOpen
Alcohols are common alkylating agents and starting materials alternative to harmful alkyl halides. In this study, a simple, benign and efficient pathway was developed to synthesize 1,3‐diphenylpropan‐1‐ols via the β‐alkylation of 1‐phenylethanol with ...
Dr. Ha V. Le, M. Sc. Vy T. B. Nguyen, M. Sc. Huy X. Le, Dr. Tung T. Nguyen, Dr. Khoa D. Nguyen, Dr. Phuoc H. Ho, Thuong T. H. Nguyen   +6 more
doaj   +1 more source

FELT CARBON ELECTRODES MODIFIED WITH RUTHENIUM DIMERIC FILM: APPLICATION IN ALCOHOL ELECTROCHEMICAL OXIDATIONS

Eclética Química, 2018
Modified films were prepared by deposition of poli-[(H2O)(L)2Ru-O-Ru(L)2(OH2)]4+ (L=4-methyl- 4´-pyrrol-1-yl-buthyl-2,2´-bipyridine) (poly-dim.), on felt carbon electrodes, by direct anodic electropolymerization of the monomer.
Claudemir Batalini, Wagner Ferraresi De Giovani   +1 more
doaj   +1 more source

Nanomaterials functionalized acidic ionic organosilica as highly active catalyst in the selective synthesis of benzimidazole via dehydrogenative coupling of diamines and alcohols

Scientific Reports
An acidic tungstate-based zwitterionic organosilica drived simple self-condensation of tungstic acid and zwitterionic organosilane (PMO-IL-WO4 2−), was remarkably demonstrated to be highly efficient and environmentally friendly catalyst for directly ...
Fatemeh Rajabi, Afsaneh Feiz
doaj   +1 more source

Electrochemical formal homocoupling of sec-alcohols

Beilstein Journal of Organic Chemistry, 2022
Electrochemical pinacol coupling of carbonyl compounds in an undivided cell with a sacrificial anode would be a promising approach toward synthetically valuable vic-1,2-diol scaffolds without using low-valent metal reductants. However, sacrificial anodes
Kosuke Yamamoto, Kazuhisa Arita, Masashi Shiota, Masami Kuriyama, Osamu Onomura   +4 more
doaj   +1 more source