Hydrosilylation in Aryliminopyrrolide-Substituted Silanes
A range of silanes was synthesized by the reaction of HSiCl3 with iminopyrrole derivatives in the presence of NEt3. In certain cases, intramolecular hydrosilylation converts the imine ligand into an amino substituent. This reaction is inhibited by factors such as electron‐donating substitution on Si...
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Published in | Chemistry : a European journal Vol. 22; no. 17; pp. 6087 - 6099 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
WEINHEIM
Blackwell Publishing Ltd
18.04.2016
Wiley Wiley Subscription Services, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | A range of silanes was synthesized by the reaction of HSiCl3 with iminopyrrole derivatives in the presence of NEt3. In certain cases, intramolecular hydrosilylation converts the imine ligand into an amino substituent. This reaction is inhibited by factors such as electron‐donating substitution on Si and steric bulk. The monosubstituted (DippIMP)SiHMeCl (DippIMP=2‐[N‐(2,6‐diisopropylphenyl)iminomethyl]pyrrolide), is stable towards hydrosilylation, but slow hydrosilylation is observed for (DippIMP)SiHCl2. Reaction of two equivalents of DippIMPH with HSiCl3 results in the hydrosilylation product (DippAMP)(DippIMP)SiCl (DippAMP=2‐[N‐(2,6‐diisopropylphenyl)aminomethylene]pyrrolide), but the trisubsitituted (DippIMP)3SiH is stable. Monitoring the hydrosilylation reaction of (DippIMP)SiHCl2 reveals a reactive pathway involving ligand redistribution reactions to form the disubstituted (DippAMP)(DippIMP)SiCl as an intermediate. The reaction is strongly accelerated in the presence of chloride anions.
Dancing ligands: Intramolecular hydrosilylation was studied in several aryliminopyrrolide silanes. Ligand redistribution processes are found to play a key role in this reaction (see scheme). |
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Bibliography: | Netherlands Organization for Scientific Research (NWO) Sectorplan Natuur- en Scheikunde istex:D4669EC91B86EADE95DE03135C592AE8DCA1A925 ArticleID:CHEM201505033 Dutch National Research School Combination Catalysis (NRSC-C) ark:/67375/WNG-MNWMRHVK-F European Union Seventh Framework Programme - No. PIIF-GA-2012-327306 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0947-6539 1521-3765 |
DOI: | 10.1002/chem.201505033 |