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Instant one-pot synthesis of functional layered double hydroxides (LDHs) is demonstrated for the first time using a continuous hydrothermal multi-step process. The as-prepared pristine material displays high crystallinity and very small LDH nanoparticle size, lateral dimensions below 100 nm and a thickness below 20 nm, all being achieved in only 5 s. This approach was extended to the preparation of i) pristine LDH with different compositions by varying the cation (Mg, Ni, or Zn) and the anion (CO3, NO3) and ii) functional LDH by varying the functionalization agent, for example long organic molecules (hybrid LDH), enzymes (bio-hybrid LDH) or inorganic metal/oxide nanocrystals (inorganic-LDH). Beyond the design of functional LDH, this paper presents proof of concept for a continuous, one-pot and multistep high temperature/high pressure (HT/HP) process for the assembly of nanoscaled materials. [ABSTRACT FROM AUTHOR]

Palladium nanoparticles, simply and briefly generated in commercial and cheap onium salts using supercritical carbon dioxide, have been found to be an effective catalytic system for additive free N-alkylation reaction using alcohols via cascade oxidation/condensation/reduction steps. [ABSTRACT FROM AUTHOR]

In situformationof aryl Grignard under Barbiercondition and diisopropylaminoborane as boron source allows a completecontrol of the addition onto the boron electrophile. Analyticallypure borinic acid derivatives were produced at the gram scale withoutcolumn chromatography and isolated as borinates adducts, with ethanolamineor 8-hydroxyquinoline, after workup. [ABSTRACT FROM AUTHOR]

We describe herein an efficient and particularly sustainable catalytic system for the intramolecular hydroalkoxylation of double bonds. A heterogeneous catalyst based on the impregnation of benign metals such as iron and bismuth on montmorillonite was used for a highly atom-economic transformation in DMC, a non-VOC solvent. The transformation allowed the formation of a large range of cyclic ethers from the corresponding unsaturated alcohols and the catalyst could be recycled several times. [ABSTRACT FROM AUTHOR]

An efficient and versatile synthesis of indane, tetralin and benzosuberan derivatives has been developed; the synthesis starts from nonactivated aromatic compounds bearing unsaturated side chains and is a bismuth(III) or indium(III) trifluoromethanesulfonate-catalysed atom-economic process. A variety of polycyclic compounds have been isolated in high yields. Lactonisation could be observed for esters with 2,2-disubstituted terminal olefins through a Lewis acid catalysed reaction between the olefin and one of the ester groups. [ABSTRACT FROM AUTHOR]

Abstract Owing to the unusual reactivity of dialkylamine-borane complexes, a methodology was developed to simply access boronic acids. The intrinsic instability of magnesium aminoborohydride was tweaked into a tandem dehydrogenation borylation sequence. Proceeding via an autocatalytic cycle, amineborane dehydrogenation was induced by a variety of Grignard reagents. Overall, addition of the organomagnesium species onto specially designed dialkylamine-borane complexes led to a variety of boronic acids in high yields. In addition, the reaction can be performed under Barbier conditions, on a large scale. Graphical abstract Image 1 [ABSTRACT FROM AUTHOR]

A large range of cyclic ethers is synthesized by intramolecular hydroalkoxylation of corresponding unsaturated alcohols using benign metals such as Fe and Bi supported on montmorillonite as sustainable catalyst systems. [ABSTRACT FROM AUTHOR]

An abstract of the article "Access to Polycyclic Derivatives by Triflate-Catalyzed Intramolecular Hydroarylation" by B. Cacciuttolo and colleagues is presented.

Cyclohydroarylation or tandem intramolecular cycloaddition reactions produce different types of polycycles. [ABSTRACT FROM AUTHOR]

Starting from maleimidederivatives, a series of 2-thioxoimidazolidinones was prepared through two different procedures. These syntheses have achieved in two steps via reaction between maleimide derivatives 1,semicarbazide hydrochloride 9 and isothiocyanates5,the best results being obtained under acid conditions (AcOH or heteropolyacid in ethanol or acétonitrile). The synthesized compounds 11a-f and substituted thiohydantoins 6a-h, 8a-h were screened for their in vitro anti-bacterial activity against four bacterial strains. [ABSTRACT FROM AUTHOR]

Palladium nanoparticles, simply and briefly generated in commercial and cheap onium salts using supercritical carbon dioxide, have been found to be an effective catalytic system for additive free N-alkylation reaction using alcohols via cascade oxidation/condensation/reduction steps.

Intramolecular hydroarylation of allenes was achieved under very mild conditions using bismuth(III) triflate as the catalyst. Efficient functionalization of activated and nonactivated aromatic nuclei led to C-C bond formation through a formal Ar-H activation. A tandem bis-hydroarylation of the allene moiety was also developed giving access to various interesting polycyclic structures.