Structural and Spatial Considerations in the N,N'-Diacyl- and Bis(alkoxycarbonyl)bispidinone Series.

[摘要]：Diamidic and dicarbamic bispidinones show trans-cis isomerism, the relative population in soln. of the cis form increasing with solvent polarity. The mutual proximity of the two amide functions in I (R = Ph, R' = Ac)4a has no impact on the barrier to isomerization. The system represents a peculiar case of planar chirality posing a challenge to its specification.

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