Hydrogen-bonded networks of 2,2′-substituted 4,4′-biimidazoles: New ligands for the assembled metal complexes

Dehydrogenative Syntheses of Biazoles via a "Pre-Join" Approach

The structural motif of biazoles is the predominant substructure of many natural products, pharmaceuticals, and organic materials. Considerable efforts have focused on synthesizing these compounds; however, a limited number of processes have been reported for the efficient formation of biazoles. Herein, we report a "pre-join" approach for the dehydrogenative synthesis of biazoles, which are challenging to prepare using conventional methods. A bench-stable and easily synthesized pyrazine-based group is critical for this transformation. This strategy enables the homocoupling of biazoles and the heterocoupling of two different azoles. Due to the broad substrate scope, this strategy exhibits potential for use in other fields, such as medicine, materials, and natural product chemistry.

A triptycene-based porous hydrogen-bonded organic framework for guest incorporation with tailored fitting

By employing a robust and non-coplanar building block strategy, a triptycene-based hydrogen-bonded organic framework was constructed with almost no sacrifice of molecular surfaces, and it was capable of incorporating C60 molecules in high concentration in the channels with tailored fitting.