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The method demonstrates efficient synthesis of dibenzo isoquinolinones via irradiation, suggesting a simple, catalyst-free process.
A concise method for the synthesis of trans ‐3‐alkoxydibenzo[f,h]isoquinolin‐1‐ones 3 via photo‐cascade hydroalkoxylation of 3‐(2‐biphenylyl)‐2‐pyridones 1 and alcohols 2 was developed. This transformation proceeds through a 6π‐electrocyclization and a 1,5‐H shift, forming an intermediate that subsequently undergoes a hydroalkoxylation upon irradiation at 313 nm. Notably, this one‐step method proceeds under mild, catalyst‐free conditions, providing a simple and efficient synthetic pathway with high atom economy and good yields.
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Ullah et al. (2026) studied this question.
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