Bidentate N, O-aluminum complexes: Synthesis, characterization and catalytic study for MPV reduction reactions

Hua, Yupeng; Suo, Hongyi; Wei, Xuehong

doi:10.1016/j.jorganchem.2015.06.011

Cited by 11 publications

(2 citation statements)

References 55 publications

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“…For example, Noyori’s group reported the Ru(II) complex containing 1,2-diamino ligands for the MPV reaction of ketones with >99% yield . Recently, our group reported that a monomeric bidentate N,O-aluminum complex exhibited good to excellent catalytic activity for MPV reactions . Meanwhile, new and effective catalytic systems for MPV reactions should be developed for future industrial applications: in particular, the use of an earth-abundant, inexpensive metal alternative to precious metals in transition-metal catalytic reactions.…”

Section: Resultsmentioning

confidence: 99%

N,N,O-Tridentate Mixed Lithium–Magnesium and Lithium–Aluminum Complexes: Synthesis, Characterization, and Catalytic Activities

2017

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The syntheses and crystal structures of a series of heterobimetallic Li/Mg and Li/Al complexes prepared from an N,N,O-tridentate ligand are described. The ligand HOC(CH2)5CH2N(Me)CH2CH2NMe2 (LH) and nBu2Mg were used to synthesize the homometallic magnesium alkoxide [{LMgOC(CH2)5CH2 N(Me)CH2CH2 NMe2}2] (1), which was reacted with nBuLi to afford the lithium alkylmagnesiate [{Bu2Mg{LiOC(CH2)5CH2 N(Me)CH2CH2 NMe2}}2] (2). Complex 2 was then hydrolyzed to produce [{BuMgOLi{LiOC(CH2)5CH2 N(Me)CH2CH2 NMe2}2}2] (3). The sequential reaction of LH in diethyl ether with RAlMe2 (R = Me, Cl) and nBuLi aforded two lithium aluminate complexes containing a polymeric structure of one-dimensional chains [{−LiOC(CH2)5CH2 N(Me)CH2CH2 NMe2}Al(Me)(n-Bu)CH3−} n ] (4) and [{−LiOC(CH2)5CH2 N(Me)CH2CH2 NMe2}Al(n-Bu)2CH2−} n ] (5), respectively. Each of the complexes 1–5 was structurally characterized and tested for its capability to catalyze Meerwein–Ponndorf–Verley (MPV) reactions. Heterobimetallic complexes 2 and 3 exhibited catalytic activities better than those of homometallic magnesium complex 1 and heterobimetallic lithium aluminate complexes 4 and 5 for MPV reactions.

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Section: Resultsmentioning

confidence: 99%

N,N,O-Tridentate Mixed Lithium–Magnesium and Lithium–Aluminum Complexes: Synthesis, Characterization, and Catalytic Activities

2017

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“…Recently,s everal readily accessible aluminum compounds supported by polydentate ligands, sometimes bearing bulky substituents, were shown to be effective MPV reduction catalysts (6-10, Scheme 6). [44][45][46][47][48][49] Among these new compounds, the silanolate derivative 6 was the most active with catalystl oadings of 0.5-1.0 mol %a nd temperatures rarely above 50 8C. [44]…”

Section: Reduction Of C=oa Nd C=nbondsmentioning

confidence: 99%

Recent Developments on the Use of Group 13 Metal Complexes in Catalysis

2018

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The present Minireview highlights the most representative and emerging developments reported since 2012 on the use of well‐defined group 13 metal species in homogeneous catalysis. Apart from their use in polymerization catalysis, group 13 metal catalysts have primarily been developed for the functionalization of polar/unsaturated small molecules, with most reactions involving C−C, C−O or C−N double or triple bond functionalization (most frequently (C6F5)3Al and low‐coordinate Al cations). The exploitation of group 13 catalysts for CO2 functionalization chemistry has made remarkable advances over the past five years, including the development of Al‐ and Ga‐based complexes for CO2 hydrosilylation/hydroboration. Highly effective Al catalysts for the production of cyclic carbonates via CO2/epoxide coupling are also discussed. The emerging use of simple Group 13 metal Lewis pairs for the controlled polymerization of polar monomers is also reviewed.

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