Olefin metathesis is undoubtedly one of the biggest success stories of homogeneous catalysis during the last decades and, as such, was rapidly embraced by the synthetic community. The related metathesis of alkynes, in contrast, is much less commonly used, even though the reaction benefits from a surprisingly strong driving force and is mechanistically fairly well understood. The classical alkyne metathesis catalysts are rather difficult to make, highly sensitive and therefore of limited significance...
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