Hydrogenation Catalysis in Biobased Ionic Liquids

This chapter is dedicated to hydrogenation procedures of (poly)-alkenes or unsaturated ketones in various biobased and not-biobased ionic liquids. The first part of this chapter defines the concept of biobased ionic liquids and their preparation. In the second part, hydrogenation processes performed in non-biobased ionic liquids are described. Finally, in the last part, the two themes are mixed and recent examples of hydrogenation procedures of alkenes, polyalkenes or unsaturated ketones in biobased ionic liquids are developed

Encapsulation of essential oils for the development of biosourced pesticides with controlled release: a review

Essential oil (EO) encapsulation can be carried out via a multitude of techniques depending on applications. Because of EOs biological activities, development of biosourced pesticides with EOs encapsulation is of great interest. A lot of methods had been developed; they are presented in this review together with the properties of the final products. Encapsulation conserves and protects EOs from outside aggression, but also allows for controlled release, which is useful for applications in agronomy. The focus is on matrices that are of interest for the controlled release of their content: alginate, chitosan and cyclodextrin. Those three matrices are used with several methods to create EOs encapsulation with different structures, capacities and release profiles.European Hub on New Challenges in the Field of Essentials Oils (EOHUB) project (600873-EPP-1-2018-1ES-EPPKA2-KA)

Click Reactions as a Key Step for an Efficient and Selective Synthesis of D-Xylose-Based ILs.

D-Xylose-based ionic liquids have been prepared from D-xylose following a five steps reaction sequence, the key step being a click cycloaddition. These ionic liquids (ILs) have been characterized through classical analytical methods (IR, NMR, mass spectroscopy, elemental analysis) and their stability constants, Tg and Tdec, were also determined. Considering their properties and their hydrophilicity, these compounds could be alternative solvents for chemical applications under mild conditions

Preparation of New Glycerol-Based Dendrimers and Studies on Their Behavior toward Essential Oil Encapsulation

peer reviewedTwo new families of glycerol-based dendrimers (glyceroladendrimers (GADs) and glyceroclickdendrimers (GCDs)) have been synthesized. Three generations have been isolated for each family with good yields and were fully analyzed. The encapsulation of essential oils (citronella and cinnamon) in GADs, GCDs, and also in previously described glycerodendrimers GD-PAMAMs and GD-PPIs has been studied by dynamic-headspace gas chromatography coupled to mass spectrometry. The retention rates obtained were from −35.8 to 26.65% for citronella essential oil and from 2.14 to 38.84% for the cinnamon essential oil. In addition, the best results were obtained with GD-PAMAMs and GD-PPIs of higher generation. The interaction study between essential oils or more precisely their major components have been performed through NMR spectroscopy (1 H NMR and DOSY NMR). No direct interactions between dendrimers and essential oils have been observed, but a surprising behavior of compression of the dendrimer in stable emulsions was observed. Indeed, the hydrodynamic radius of GD-PPI-3 has been reduced in the presence of cinnamon essential oil

Access to enimines via titanium tetrachloride-promoted condensation of amines with arylenones

International audienc

15-Membered macrocyclic triolefin: role in recovering active palladium catalyst for the telomerization of butadiene with methanol

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Palladium on charcoal plus enantiopure amino alcohols as catalytic systems for the enantioselective 1,4reduction of α-substituted α,β-unsaturated ketones

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