Investigation of titanium-catalysed dehydrogenative coupling and hydrosilylation of phenylhydrogenosilanes in a one-pot process

Titanium-catalysed dehydrocondensation and hydrosilylation of primary, secondary and tertiary phenylsilanes have been investigated in a one-pot process with Cp2Ti(OPh)2 as catalyst by NMR studies. Only primary and secondary silanes were found to undergo simultaneous dehydrogenative coupling and hydrosilylation reactions to produce the functional polysilanes.

Cp2Ti(OPh)2 acts as a good catalyst for a one-pot hydrosilylation and dehydrogenative coupling reactions of primary and secondary phenylsilanes. While no reaction was observed from the tertiary silane (Ph3SiH), the bulkier disilane (Ph2HSi–SiHPh2) undergoes also the hydrosilylation.Figure optionsDownload as PowerPoint slide