Other bis-functionalization patterns

The Bingel macrocyclization is not completely regioselective in each case [25, 59]. As an example, the use of a tether derived from l,10-phenanthroline-2,9-dimethanol yielded both e bis-adduct ( )-46 and trans-A bis-adduct 47. 

3 Formation of Bis-adducts by Double Diels-Alder Addition of Tethered Bis(buta-l,3-diene)s to C o 

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