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Abstract
AbstractOrganic transformations initiated by photochemical activation have been at the forefront of reaction discovery. In this study, we present a formal photochemical [3+2] and [4+2] cycloaddition using N‐aryl cyclopropylamines and N‐aryl cyclobutylamines in conjunction with α,β‐unsaturated carbonyl systems, unveiling two distinct mechanistic pathways. The [3+2] cycloaddition is elucidated as being guided by the photochemical activity of an electron donor‐acceptor (EDA) complex. Simultaneously, intermolecular [4+2] annulation of cyclobutylanilines is achieved by visible‐light photoredox catalysis. These simple methodologies have wide applicability, facilitating the synthesis of N‐arylaminocycloalkyl compounds in yields ranging from good to excellent.
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