Abstract The N-2, 4-dinitrophenylsulfonyl group (dinosyl, DNs) was found to be an excellent choice for the N-activation of aziridines towards ring cleavage with primary, secondary, andsterically demanding tertiary alcohols. Alcoholysis does not need any additional catalyst and is regioselective for the less-hindered position. No racemization in the aziridine formation or cleavage step was observed, and the resulting DNs-sulfonamides can be ...
