Synthesis and Reactions of Aluminum Sulfonamide Alkyls and Hydride

Pinacol Cross-Coupling Promoted by an Aluminyl Anion

A simple sequential addition protocol for the reductive coupling of ketones and aldehydes by a potassium aluminyl grants access to unsymmetrical pinacolate derivatives. Isolation of an aluminium ketyl complex presents evidence for the accessibility of radical species. Product release from the aluminium centre was achieved using an iodosilane, forming the disilylated 1,2-diol and a neutral aluminium iodide, thereby demonstrating the steps required to generate a closed synthetic cycle for pinacol (cross) coupling at an aluminyl anion.

Molecular Main Group Metal Hydrides

This review serves to document advances in the synthesis, versatile bonding, and reactivity of molecular main group metal hydrides within Groups 1, 2, and 12-16. Particular attention will be given to the emerging use of said hydrides in the rapidly expanding field of Main Group element-mediated catalysis. While this review is comprehensive in nature, focus will be given to research appearing in the open literature since 2001.

Heterobimetallic aluminate derivatives with bulky phenoxide ligands: a catalyst for selective vinyl polymerization

New aluminates as active catalysts for vinyl polymerization are described, as well as a strategy to crosslinked polymers from GMA in a controlled fashion.

Reactions of α-diimine-aluminum complexes with sodium alkynides: versatile structures of aluminum σ-alkynide complexes

Reaction of AlCl(3) with the monoanionic α-diimine ligand [NaL] yielded the complex [L˙(-)Al(III)Cl(2)(-)] (1, L = [(2,6-iPr(2)C(6)H(3))NC(Me)](2)), and subsequent reduction of by sodium metal afforded the mononuclear [L(2-)Al(III)Cl(-)(THF)] (2) and binuclear [L(2-)(THF)Al(II)-Al(II)(THF)L(2-)] (3). Compounds 2 and 3 exhibit interesting reactivities to sodium alkynides at room temperature. Treatment of dialumane 3 with 1 equiv. of 4-methylphenylacetylene in the presence of sodium metal yielded the asymmetric Al-Al-bonded compound [Na(Et(2)O)][LAl-Al(C[triple bond, length as m-dash]C(C(6)H(4)-Me))L] (4) containing an alkynyl group attached to one of the Al atoms. The reaction of 2 with 4-methylphenylacetylene and Na (or sodium 4-methylphenylacetylide) resulted in the mononuclear product [L(THF)Al(C[triple bond, length as m-dash]C-(C(6)H(4)-Me))] (5) containing a single terminal acetylide ligand. Precursor 2 reacted with 2 equiv. of phenylacetylene (or 4-methylphenylacetylene, trimethylsilylacetylene) and Na to give the tweezer "ate" complexes, [Na(THF)(DME)][LAl(C[triple bond, length as m-dash]CR)(2)] (R = C(6)H(5), ; C(6)H(4)-Me, ; Si(Me)(3), 6c), [Na(THF)](2)[LAl(C[triple bond, length as m-dash]CPh)(2)](2)(μ-C(7)H(8)) (7), [Na(C(7)H(8))][(μ-Na)][LAl(C[triple bond, length as m-dash]CSi(Me)(3))(2)](2) (8), as well as the polymeric [LAl(C[triple bond, length as m-dash]CPh)(2)Na](n) (9). In the products, two alkynyl groups coordinate terminally to one Al center and a sodium ion is embedded between these two alkynyls. Interestingly, both cycloaddition and terminal acetylide coordination of three equiv. of alkyne occurred in the reaction of with 1-hexyne, resulting in the unique dialuminum complex [Na(Et(2)O)](2)[{L(C(C(4)H(9))[double bond, length as m-dash]CH)}Al(C[triple bond, length as m-dash]C(C(4)H(9)))(2)](2) (10). Complexes 1-10 have been characterized by NMR ((1)H, (13)C) and IR spectroscopy, elemental analysis, and X-ray diffraction, and their electronic structures were studied by DFT calculations.

Optimizing ring-opening polymerization of ε-caprolactone by using aluminum complexes bearing amide as catalysts and their application in synthesizing poly-ε-caprolactone with special initiators and other polycycloesters

A series of aluminum complexes bearing amidate ligands, including acylamide, sulfonamide, and aryl carbamate, was synthesized.