Synthesis, structure, and catalytic activity of lanthanide Gd(III) and La(III) complexes with <i>N</i>-(cyclohexyl)isopropyl amidate ligand

Wang, Yulong; Zhou, Yan-Xu; Deng, Le-Qing; Hu, Qiaodan; Tao, Xian; Shen, Yingzhong

doi:10.1080/00958972.2013.847184

Cited by 6 publications

(1 citation statement)

References 43 publications

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“…The amide ligand precursors are easily prepared via the nucleophilic acyl substitution of an acid chloride with a primary amine [18] in a variety of substitution patterns such that the steric and electronic properties of the amidate ligand can be readily modulated. Amidate ligand complexes have been shown to support a variety of transition [19][20][21][22][23] and rare-earth metals [24][25][26][27][28] that has resulted in a family of useful reagents for metalmediated transformations. The synthesis of Al-amidate complexes was originally reported by Lappert and Horder [29] and Wade et al, [30] and was expanded on by the Lin group to include various substituents in the amidate ligand.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Catalytic Activity of a Series of Aluminium–Amidate Complexes

et al. 2015

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The aluminium complexes {[k 2 -N,O-(t-BuNCOPh)]AlMe 2 } 2 (2), [k 2 -N,O-(t-BuNCOPh)] 2 AlMe (3), and [k 2 -N,O-(t-BuNCOPh)] 3 Al (4) were prepared through the protonolysis reaction between trimethylaluminium and one, two, or three equivalents, respectively, of N-tert-butylbenzamide. Complex 2 was also prepared via a salt metathesis reaction between K(t-BuNCOPh) and dimethylaluminium chloride. Complexes 2-4 were characterized using 1 H and 13 C NMR spectroscopy. Single-crystal X-ray diffraction analysis of the complexes corroborated ligand : metal stoichiometries and revealed that all the amidate ligands coordinate to the aluminium ion in a k 2 fashion. The Al-amidate complexes 2-4 were viable catalyst precursors for the Meerwein-Ponndorf-Verley-Oppenauer reduction-oxidation manifold, successfully interconverting several classes of carbonyl and alcohol substrates.The 1 : 1 reaction between trimethylaluminium and various simple amides has been previously reported by the Lin group [31,32] who showed that the bonding mode of the ligand and solid-state structure of the Al-amidate complexes were dependent on the substitution pattern of the amide precursor.

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