Enantioselective Inclusion Complexation of N‐Nitrosopiperidines by Steroidal Bile Acids

N ‐nitrosamines , whose chirality is solely due to hindered rotation about the N−N bond, are enantioselectively enclathrated by the crystal host matrices of cholic or deoxycholic acid, as evidenced by X‐ray crystallography (see structure in picture) and CD spectra.