Toward vanadium-mediated alkyne metathesis

Key Points

• The central aim is to explore the reaction of vanadium alkylidynes with alkynes to form intermediates crucial for alkyne metathesis.
• Investigated the reaction of vanadium alkylidynes with various alkynes.
• Studied the formation of metallacyclobutadienes through a [2+2] cycloaddition reaction.
• Confirmed the formation of metallacyclobutadienes as key intermediates.
• Outlined the mechanistic pathway for alkyne metathesis with vanadium involvement.