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The kinetically controlled, regioselective deprotonation of cyclopentenyl cations is mediated by encapsulation within a metal–ligand assembly. The regiochemistry of the deprotonation step determines which one of two possible products is formed. Moreover, subtle differences in the stereochemistry of the encapsulated cation switch the selectivity of this process (see scheme).
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Hastings et al. (2011) studied this question.
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