期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 24, 期 39, 页码 9940-9948出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201801541
关键词
aluminate; homogeneous catalysis; hydroboration; lithium; metallation
资金
- EPSRC [EP/N011384/1]
- Alexander von Humboldt foundation
- Deutscher Akademischer Austauschdienst (DAAD)
A series of heteroleptic monoamido-monohydrido-dialkylaluminate complexes of general formula [iBu(2)AlTMPHLi center dot donor] were synthesized and characterised in solution and in the solid state. Applying these complexes in catalytic hydroboration reactions with representative aldehydes and ketones reveals that all are competent, however a definite donor substituent effect is discernible. The bifunctional nature of the complexes is also probed by assessing their performance in metallation of a triazole and phenylacetylene and addition across pyrazine. These results lead to an example of phenylacetylene hydroboration, which likely proceeds via deprotonation, rather than insertion as observed with the aldehydes and ketones. Collectively, the results emphasise that reactivity is strongly influenced by both the mixed-metal constitution and mixed-ligand constitution of the new aluminates.
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