Cross-coupling Reaction Using Low-valent Titanium- and Niobium-alkyne Reagents

摘要

Alkyne complexes of low-valent early transition metals are useful synthetic reagents, and reactions with various electrophiles have been investigated. In particular. Ti(II)-alkyne complexes have been intensively studied. However, the Ti(II)-alkyne complexes thus obtained are thermally unstable and cannnot be utilized in further synthetic reactions which are carried out above -30 deg C.