Formal [2 + 2 + 2] Cycloaddition Reaction of a Metal–Carbyne Complex with Nitriles: Synthesis of a Metallapyrazine Complex

Abstract

Although alkynes have been extensively exploited in [2 + 2 + 2] cycloadditions with nitriles to form N-heterocyclic aromatics, the “alkyne-like” metal–carbon triple bond has never been used in [2 +...