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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Fröhlich, Roland Mewald, Marius Oestreich, Martin |
| Description | Author Affiliation: Mewald M ( Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany.) |
| Abstract | An axially chiral dihydroborepine with a binaphthyl backbone and a $C_{6}F_{5}$ substituent at the boron atom was prepared by transmetalation from the corresponding tin precursor. This novel motif was structurally characterized by X-ray diffraction analysis as its THF and its PhCN Lewis acid/base complex. $^{1}H NMR$ measurements at variable temperatures of the former adduct revealed a remarkable dynamic behavior in solution. Several more Lewis pairs with oxygen, nitrogen, carbon, and phosphorus σ-donors were synthesized and analyzed by multinuclear NMR spectroscopy. The determination of the borane’s Lewis acidity with the Gutmann–Beckett method attests its substantial Lewis acidity [85 % with $Et_{3}PO$ as well as 74 % with $Ph_{3}PO$ relative to the parent $B(C_{6}F_{5})_{3}].$ Representative examples of SiH bond activation (carbonyl reduction and dehydrogenative SiO coupling) are included, demonstrating the chemical stability and the synthetic potential of the new chiral boron-based Lewis acid. |
| ISSN | 09476539 |
| e-ISSN | 15213765 |
| Journal | Chemistry - A European Journal |
| Issue Number | 34 |
| Volume Number | 17 |
| Language | English |
| Publisher | Wiley-VCH;ChemPubSoc Europe |
| Publisher Date | 2011-08-16 |
| Publisher Place | Germany |
| Access Restriction | Open |
| Subject Keyword | Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Catalysis |
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