Synthesis of racemic chiral-at-metal complexes of the Group 4 metals
A protocol for asymmetric synthesis of chiral-at-metal complexes is described, but enantiomerically-enriched products can not be isolated due to formation of complexes between the Group 4 metallocene products and the borane by-products. An efficient method for synthesis of racemic chiral-at-metal metallocenes, through lithium chloride catalysed ligand redistribution reactions, is described. Sterically-hindered racemic chiral-at-metal complexes are prepared by nucleophilic substitution of prochiral dichlorides.
Alcock, Nathaniel W.,Clase, Howard J.,Duncalf, David J.,Hart, Suzanne L.,McCamley, Andrew,McCormack, Peter J.,Taylor, Paul C.
p. 45 - 54
(2007/10/03)
Synthesis of Racemic Chiral-at-Metal Complexes of the Group 4 Metals by a Lithium Chloride Catalysed Ligand Redistribution Reaction
Lithium chloride catalysis permits ligand redistribution to be a synthetically useful for preparation of racemic chiral-at-metal group 4 metallocene derivatives.
Hart, Suzanne L.,McCamley, Andrew,McCormack, Peter J.,Taylor, Paul C.
p. 383 - 385
(2007/10/03)
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