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studies are in progress towards the synthesis of a poly-
mer anchored version of 2 and ent-2 and the evaluation
of the supported ligandsÕ retained activity.
References and notes
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18. In this first preparation, 120 mg of pure ent-2 were
obtained. However, the synthetic sequence would be fully
suitable in order to prepare larger amounts of the ligand,
to be evaluated as reagent for asymmetric reactions.