A new selective approach to unsymmetrical siloxanes and germasiloxanes via O-metalation of silanols with 2-methylallylsilanes and 2-methylallylgermanes
A scandium(III) trifluoromethanesulfonate-catalyzed O-metalation of silanols with 2-methylallylsilanes and 2-methylallylgermanes leading to siloxane or germasiloxane bond formation under mild conditions with evolution of isobutylene is described.
A Highly Effective Route to Si−O−Si Moieties through
<i>O</i>
‐Silylation of Silanols and Polyhedral Oligomeric Silsesquioxane Silanols with Disilazanes
作者:Krzysztof Kuciński、Grzegorz Hreczycho
DOI:10.1002/cssc.201802757
日期:2019.3.7
A simple and highly practical catalyst‐free O‐silylation of silanols with commercially available disilazanes has been developed under mild conditions. In the case of polyhedral oligomeric silsesquioxane (POSS) silanols and some other silanols, it was necessary to usecatalyticamounts of inexpensive Bi(OTf)3 as additional catalyst. This efficient chlorine‐free protocol involves the synthesis of a wide