C 2 ‐Symmetric Metacyclophanes: A Possible Alternative to o , o ′‐Bridged Binaphthyls

The trick with the chiral clamp: In metacyclophanes such as ( P )‐ 2 it is possible to stabilize one chiral conformation by means of a chiral clamp so effectively that at room temperature only this conformation is present. This conformation resembles that of o , o ′‐bridged binaphthyls (for example ( P )‐ 1 ). New binaphthyl alternatives are thus made accessible.