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Directly observed transmetalation from boron to rhodium. beta-aryl elimination from Rh(I) arylboronates and diarylborinates.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhao, Pinjing Incarvito, Christopher D. Hartwig, John F. |
| Copyright Year | 2007 |
| Abstract | Transmetalation from boron to rhodium in the absence of basic activators is reported to proceed by β-aryl elimination from a series of triethylphospine-ligated rhodium(I) arylboronates and diarylborinates. [Rh(PEt3)3OB(OH)Ar] were prepared by treating {Rh(PEt3)2[N(SiMe3)2} with the corresponding arylboronic acid, ArB(OH)2, in the presence of added PEt3. One example of these complexes was characterized by X-ray diffraction. [Rh(PEt3)3OB(mesityl)2] and [Rh(PEt3)2OB(mesityl)2] were prepared by analogous methods from dimesitylborinic acid in the presence and absence of added PEt3. Heating of the trisphosphine boronate complexes in cyclohexane generated the rhodium aryl complexes, [(PEt3)3RhAr] and boroxin in good to high yields. [Rh(PEt3)3OB(mesityl)2] also underwent aryl migration to form [(PEt3)3Rh(mesityl)] and a cyclic boroxine. Kinetic studies showed that migration of more electron-poor aryl groups from the boronate complexes was slightly faster than migration of more electron-poor aryl groups and that m... |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/ja068587q |
| PubMed reference number | 17256944 |
| Journal | Medline |
| Volume Number | 129 |
| Issue Number | 7 |
| Alternate Webpage(s) | https://chasqueweb.ufrgs.br/~ricardo.gomes/Disciplinas/040/artigos_PDF/transmet-Rh-boro.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/ja068587q |
| Journal | Journal of the American Chemical Society |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
