期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 351, 期 16, 页码 2675-2682出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.200900400
关键词
catalysis; metathesis; ruthenium complexes; silsesquioxanes; silylative coupling
资金
- National Centre for Research and Development (Poland) [NR 05 0005 04/2008]
- Operational Programme of Human Resources
- EU European Social Fund
- Polish State
Monovinylheptaisobutylsilsesquioxane undergoes efficient cross-metathesis and silylative coupling with styrenes. Allyl derivatives were successfully tested in cross-metathesis in the presence of first generation Grubbs' catalyst, while heteroatom-substituted vinyl derivatives (vinyl ethers, 9-vinylcarbazole) efficiently undergo silylative coupling catalysed by ruthenium hydride complexes. Both reactions proceed highly stereoselectively and lead to nearly quantitative formation of E isomers. Only when vinyl ethers are used does the reaction lead to a mixture of stereoisomers. Atmospheric pressure photoionisation has been successfully used for recording mass spectra of the functionalised silsesquioxanes.
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