Silacyclobutenes – Synthesis and reactivity Review Article

Silacyclobutenes can be prepared using different synthetic approaches such as: nucleophilic substitution reactions of organometallic reagents with silahalides; reaction of intermediary silenes or silylenes generated under FVP-conditions or by complex reagents, subsequently the silenes reacting in inter- or intramolecular [2+2] cycloaddition with Ctriple bond; length of mdashC or Cdouble bond; length as m-dashC bonds and the silylenes commonly via intramolecular insertion reaction into C–H bonds to give silacyclobutenes; use of transition metal complexes as catalysts or reagents. The reactivity of silacyclobutenes is depending on the substituents at the silicon center and at the carbon ring atoms with their reactions leading to a wide range of materials.