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Due to the generality of the CAPT strategy, other cationic electrophiles could be deemed asymmetric by amending them to a phase‐transfer setting. In 2014, the Toste group demonstrated that aryl diazonium salts were suitable electrophiles for CAPT catalysis, by developing an asymmetric diazenation of tryptamines (Scheme 4.45) [153]. In a 2015 follow‐up publication, the strategy was applied to carbonyl‐containing nucleophiles to generate quaternary diazenated stereocenters [154].