Robust Cobalt Catalyst for Nitrile/Alkyne [2+2+2] Cycloaddition: Synthesis of Polyarylpyridines and Their Mechanochemical Cyclodehydrogenation to Nitrogen-Containing Polyaromatics**

1. Wang, C.-S.
2. Sun, Q.
3. García, F.
4. Wang, C.
5. Yoshikai, N.