Catalysts have been widely used in industries and can be optimized by tuning the composition and chemical ordering of the elements involved in the nano-alloy. Among bi-metallic alloys, the Au-Cu system is of particular interest because it exhibits ordered phases at low temperatures. Nevertheless, the temperature at which these ordered structures are formed is totally unknown at the nanoscale. C...

In this report, a new solventless microencapsulation method by synthesizing polyurethane (PU) from polyol and isocyanate during an agglomeration process in a high-speed mixing apparatus was developed. Clothianidin (CTD), which is a neonicotinoid insecticide and highly effective against a wide variety of insect pests, was used as the model compound. The microencapsulated samples covered with PU ...

Solketal, the chiral acetonide of glycerol, has been employed as starting material in design a novel punctually phosphate sodium salt for catalytic applications organic and asymmetric synthesis. The racemate two enantiomers substrate are economic commercially available, straightforwardly prepared high yields from naturally occurring feedstocks. Therefore, remarkably, both final catalyst can be ...

The relative configurations of tert-butyldimethylsilyl (TBDMS) ethers of all four diastereomers of the aldols of tropinone (8-methyl-8-azabicyclo[3.2.1]octan-3-one), as well as of granatanone (9-methyl-9-azabicyclo[3.3.1]nonan-3-one), were determined from NMR data, and from the observed interconversion of the diastereomers (exo,anti to endo,syn and exo,syn to endo,anti). The exo forms invert to...

Inevitable presence of pesticides in foods demands development of efficient multiresidue methods for risk evaluation. Extraction of pesticide trace contaminants from foodstuffs is a laborious task. Development of reliable sample preparation procedures, characterized by the simplicity of both the operations and the devices involved in analytical process is need of the hour. Effective minimizatio...

Abstract Catalysis by first-row transition metals is of increasing interest in the context scarcity chemical resources. For instance, iron promising due to its abundance, low toxicity and unique electronic features. Here we synthesized quinazoline alkaloids from alkynoic acids functionalized amines presence dibromide pyridine toluene or, alternatively, a solventless reaction system. We studied ...