Ring-closing metathesis for the synthesis of phenylene-bridged silamacrocycles

Disilacycloalkadienes with bridged halophenylene rings have been successfully synthesized via ring-closing metathesis reactions. Molecular structures of these macrocycles were fully characterized by NMR spectroscopies and X-ray crystallography. The Sonogashira coupling reactions of the macrocycles with phenylacetylene did not proceed probably owing to severe steric hindrance during the reactions.