We are grateful to Dr. T. Shibue (MCCL, Waseda University) for help with the 29Si–1H HMBC and high-resolution EI-MS measurements, and also to S. Inoue (MCCL, Waseda University) for the high-resolution FAB-MS measurement of Si(OCHPh2)4. This work was supported in part by a Grant-in-Aid for Scientific Research (no. 20245044) and the Global COE program “Practical Chemical Wisdom” from MEXT (Japan). R.W. acknowledges a Waseda University Grant for Special Research Projects (2009A-899). K.K. is grateful for financial support provided through a Grant-in-Aid for JSPS Fellows from MEXT, and support by the Elements Science and Technology Project “Functional Designs of Silicon-Oxygen-Based Compounds by Precise Synthetic Strategies” from MEXT (Japan).
Nonhydrolytic Synthesis of Branched Alkoxysiloxane Oligomers Si[OSiH(OR)2]4 (R=Me, Et)†
Article first published online: 11 JUN 2010
Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
Volume 49, Issue 31, pages 5273–5277, July 19, 2010
How to Cite
Wakabayashi, R., Kawahara, K. and Kuroda, K. (2010), Nonhydrolytic Synthesis of Branched Alkoxysiloxane Oligomers Si[OSiH(OR)2]4 (R=Me, Et). Angew. Chem. Int. Ed., 49: 5273–5277. doi: 10.1002/anie.201001640
- Issue published online: 16 JUL 2010
- Article first published online: 11 JUN 2010
- Manuscript Received: 19 MAR 2010
- MEXT (Japan)
- Waseda University Grant for Special Research Projects. Grant Number: 2009A-899
- Lewis acids;
- nonhydrolytic synthesis;
Beyond silanol: A branched siloxane oligomer bearing terminal dialkoxysilyl groups was nonhydrolytically synthesized by direct alkoxysilylation of a tetraalkoxysilane with a chlorodialkoxysilane in the presence of the Lewis acid BiCl3 (see scheme). The reaction proceeds without the formation of intermediate silanol groups, and provides a selective route for siloxane-based oligomers.