A catalyst- and additive-free synthesis of alkoxyhydrosiloxanes from silanols and alkoxyhydrosilanes

Abstract

A convenient method for the selective synthesis of alkoxyhydrosiloxanes that bear SiH and SiOR² groups on the same silicon atom, R¹₃Si–O–SiR³_2−n(OR²)_nH (n = 0, 1, or 2), via a simple catalyst- and additive-free dealcoholization reaction between silanols and alkoxyhydrosilanes has been developed. These alkoxyhydrosiloxanes can be easily converted into Si(OR²)₃-containing siloxanes by zinc catalyzed alkoxylation and alkoxy-containing silphenylene polymers by platinum catalyzed hydrosilylation.