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This key transformation was accomplished with the aid of the molybdenum alkylidyne complex <jats:bold>7<\/jats:bold>, which turned out to be compatible with the acid sensitive propargylic alcohol substituents as well as the terminal alkyne unit present in the cyclization precursor. As the presence of such functionality had been detrimental for alkyne metathesis until very recently, this example illustrates the excellent application profile of this new catalyst as well as the rapidly increasing scope of the transformation. Its structural outreach can be further increased by subjecting cyclo\u20101,3\u2010diynes to appropriate post\u2010metathetic transformations, most notably with the help of alkynophilic gold or palladium catalysts. 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