Ring-Expansion Reactions of Binaphthyl Azepines and Ferrocenophanes through Metal-Catalyzed [1,2]-Stevens Rearrangements

Abstract

Enantiopure binaphthyl azocines can be prepared in a single step via the direct copper-catalyzed reaction of binaphthyl azepines and α-diazo carbonyl reagents. The [1,2]-Stevens rearrangement is general (61–93% yields) and can be extended to [3]ferrocenophanes; similar reactivity in favor of the products of ring expansion is obtained with these ferrocene derivatives (80–96% yields).

Key words

azepine - azocine - diazo ester - ferrocenophane - [1,2]-Stevens rearrangement

• References

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