Asymmetric dearomatization of pyrroles has been accomplished by using Ir-catalyzed intramolecular asymmetric allylic alkylation reactions. Reactions of allylic carbonate tethered pyrroles in the presence of [Ir(cod)Cl]2 and a BINOL-derived phosphoramidite ligand lead to efficient generation of spiro-2H-pyrrole derivatives with up to 96% ee.
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Zhuo et al. (2011) studied this question.
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