New routes towards reutericyclin analogues.

A range of N-acylpyrrolo[3,4-c]isoxazoles and derived N-acyltetramides has been prepared via a nitrile oxide dipolar cycloaddition approach, as analogues of the acyltetramic acid metabolite reutericyclin, of interest for its antibiotic potential against Gram-positive bacteria including hospital-acquired infections of resistant Clostridium difficile.

Hydroxytetraphenylenes, a new type of self-assembling building block and chiral catalyst.

Tetraphenylenes are structurally exceptional molecules with rigid conformations so that substituents of these compounds demonstrate highly directional dispositions. As such, these molecules are potential candidates for employment as organocatalysts or ligands in asymmetric synthesis. Careful design and manipulation of the structural features of tetraphenylenes should also lead to the formation of supramolecular helical scaffolds or other supermolecules with fascinating arrangements.