A Simple and Efficient Procedure for the Preparation of Benzal Chlorides and Benzal Bromides

Benzal chlorides and benzal bromides were conveniently synthesized by reaction of aryl aldehydes with a Vilsmeier type reagent formed in situ by reduction of CC1₄ or CBr₄ in dimethylformamide (DMF) as solvent.     

Stereoselective Synthesis of Versatile Intermediates for Clerodanes Total synthesis

The stereoselective synthesis of compounds 2a-d, attractive intermediates for the synthesis of clerodane diterpenes is described in 6 to 9 steps in good overall yields from commercially available racemic Wieland-Miescher ketone.     

Anion-π Interaction for Molecular Recognition of Anions: Focus on Cooperativity with Hydrogen Bonding

Anion recognition represents an active area of research in supramolecular chemistry. The last two decades have been marked by spectacular advances in the design of new anion receptors. Moreover, the development of approaches combining experimental and theoretical studies has proved to be particularly relevant, allowing for a better understanding and rationalization of the phenomena involved in anion complexation processes. In this context, the combination of weak interactions within the same receptor and their synergistic effects, called cooperativity, has attracted increasing interest within the scientific community. This Review focuses on the combination of anion-π and hydrogen bonds and the emerging concept of cooperativity. The most relevant anion-π donor families are presented. The concept of cooperativity is illustrated using the most recent examples present in current literature.