Structural and Spatial Considerations in the <i>N</i>,<i>N</i>′-Diacyl- and Bis(alkoxycarbonyl)bispidinone Series
作者:Shlomo Levinger、Yifat Sharabi-Ronen、Alexander Mainfeld、Amnon Albeck
DOI:10.1021/jo801423a
日期:2008.10.3
Diamidic and dicarbamic bispidinones show trans-cis isomerism, the relative population in solution of the cis form increasing with solvent polarity. The mutual proximity of the two amide functions in 4a has no impact on the barrier to isomerization. The system represents a peculiar case of planar chirality posing a challenge to its specification.