Manipulating the Diastereoselectivity of Ortholithiation in Planar Chiral Ferrocenes
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Abstract
The sense of asymmetric ortholithiation directed by a chiral oxazoline may be inverted simply by the choice of achiral ligand. Comparison of results with a number of ferrocenyl oxazoline derivatives suggests that lithiation takes place by coordination to the oxazoline nitrogen irrespective of the ligand used