Journal
ORGANOMETALLICS
Volume 29, Issue 15, Pages 3350-3356Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om100278b
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- Director, Office of Science, Office of Basic Energy Sciences
- U.S Department of Energy [DE-AC02-05CH11231]
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The synthesis and characterization of mixed alkyl/amide Al complexes supported by guanidinate and monoanionic OCO-pincer ligands arc described. In situ generation of the lithium-guanidinate reagents via reaction of carbodimides and lithium-amide reagents, followed by reaction with the corresponding AlMexCl3-x, reagents, resulted in the formation of compounds 1-3. Subsequent reaction with lithium arylamide reagents provided access to mixed alkyl/amide- and bis-amide-substituted complexes 4-6, which were characterized by multinuclear NMR spectroscopy and elemental analysis. Single-crystal X-ray diffraction of compounds 5a and 6a confirmed the monomeric nature of these complexes and revealed the influence of the alkyl/amide functionalities on the bonding of the guanidinate ligands A similar synthetic approach resulted in isolation of an OCO-pincer-supported Al dialkyl complex, which was also fully characterized. In contrast to the guanidinate compounds, complex 8 showed activity toward intramolecular hydroamination of 2,2-diphenylpent-4-en-l-amine.
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