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The first example of organocatalytic aziridination reaction of α‐substituted‐α,β‐unsaturated ketones is presented. The reaction was found to be highly enantio‐ and diastereoselective, yielding N‐tosylated aziridines. Low‐temperature nuclear magnetic resonance (NMR) spectra allowed for the determination of the N‐inversion barrier, that was found to be quite lower with respect to unsubstituted aziridines...
We describe herein the investigation of the stereodynamic processes occurring in a series of 1‐aryl‐2,2‐dimethylindanols, by dynamic NMR. When the aryl moiety is a mesityl or a 2‐methyl‐1‐naphthyl, the rotational barrier exceeds the 25 kcal/mol, so that stable atropisomers are observed. In two cases, all the chiral‐atropisomeric species have been separated by enantioselective HPLC, and the comparison...
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