Grinstead and his co-workers [1-3] were the first to study extractants composed of an amine, an organic acid, and a diluent, all three components being water immiscible. They tested these extractants for extraction of CaCl2, MgCl2, NaCl, NaBr, NaNO3, and Na2SO4. Their studies were followed by those of other researchers [4-29], who investigated the extraction of many other salts, including chlorides and sulfates of many transition metals. Various names were used for these extractants, including amine salts, mixed extractants, mixed ionic solvents, and binary extractants. In the following, the term acid-base-coupled (ABC) extractants is used.

Abstract Review: [37 refs.

Abstract The polyoxocations [Bi6O8]2+ and [Pb8O6]4+ are encapsulated in [(UO2)(O2)(OH)]2424‐ to form Li22 [(Bi6O8){(UO2)O2 (OH)}24]·nH2O (I) and Li16.8 [(Pb8O6)0.7(Pb8)0.2 (Pb6)0.1{(UO2)O2 (OH)}24]·nH2O (II) despite being stable on opposite ends of the pH scale in aqueous media.

Abstract A wide range of triazole derivatives (III) (72 examples) are synthesized via copper(I)‐catalyzed alkyne‐azide cycloaddition reaction.

Abstract We report that the addition of a catalytic amount of trifluoroacetic acid (TFA) shortens the induction period associated with the 1,1,1,3,3,3-hexafluoroisopropoanol (HFIP)-promoted Friedel-Crafts reaction of benzylic fluorides. This faster initiation is due to TFA’s strong hydrogen-bond donation capability, not its Bronsted acidity. The improved reaction conditions were applied to a set of substrates, demonstrating how they could improve yields and reliability of this transformation.

Nickel(II)-catalyzed enantioselective Michael addition of N-Boc-oxindole derivatives with methyl vinyl ketone was demonstrated to give the corresponding adducts having chiral all-carbon quaternary centers with up to 87% ee in the presence of axially chiral N,N,O-tridentate phenanthroline ligand.

Abstract The gold(I)‐catalyzed domino‐cyclization of 1,6‐Diynes with a t‐butylcarbonate group in the propargylic position affords α‐hydroxycyclohexenones.

Abstract Two new 2‐arylbenzofurans, (I) and (II), are isolated from the title plant.

Abstract New 3,4‐seco‐grayanane diterpenoids, neopierisoids C (I), D, E, and F (II) are isolated.

A rhodium(III)-catalyzed C–H/N–H bond functionalization for the synthesis of 1-aminoisoquinolines from aryl amidines and α-MsO/TsO/Cl ketones was achieved under mild reaction conditions. Thus, this approach provides a practical method for the site-selective synthesis of various synthetically valuable isoquinolines with wide functional group tolerance.