Intramolecular atropselective aza Paternò-Büchi reaction involving atropisomeric enamide and imine functionalities under sensitized irradiation leads to azetidine products in good yield and selectivity (ee >96 %). A mechanistic model based on detailed photophysical and isomerization kinetic studies is provided that shed light into the reactivity of enamides leading to aza Paternò-Büchi reaction.
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Kumarasamy et al. (2017) studied this question.
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