Alkyne Metathesis

Recent advances in the development of alkyne metathesis catalysts

“…Alkyne metathesis, which deals with the breaking and making of C–C triple bonds, has only relatively recently become part of the tool box of organic and polymer chemists for the preparation of their target molecules [2–11]. Catalyzed by organotransition metal complexes, this reaction type creates new C–C triple bonds very simply via the Katz mechanism (Scheme 1) [12], based on which a series of different reaction types such as alkyne cross metathesis (ACM), ring-closing alkyne metathesis (RCAM), ring-opening alkyne metathesis polymerization (ROAMP) and acyclic diyne metathesis polymerization (ADIMET) are known (Scheme 2).…”

“…A modified Schrock system containing imidazolin-2-iminato ligands that was developed by our group; 2. silanolate-supported complexes such as molybdenum nitride and alkylidyne complexes with Ph 3 SiO ligands developed by Fürstner and tungsten alkylidyne complexes with ( t -BuO) 3 SiO ligands introduced by us. Since there are already several reviews available that cover research progress up to 2006 [2–11], this article will focus on the two novel catalyst systems, which were established over the last four years (2007–10), commencing with a brief introduction to the established systems that have already been widely used by synthetic chemists.…”