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A stereochemistry-controlled suppression of carbolithiation facilitated a regioselective vinyl C-H lithiation of cis-stilbenes allowing routine regio- and stereoselective access to polysubstituted alkenes and heterocycles. This unique selectivity was obtained for numerous directing groups and could be rationalized with DFT computational studies and an experimental mechanistic illustration of a unique anion migration.
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Tricotet et al. (2009) studied this question.
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