Photolysis of a phenacyl benzoate tethered with a phenol leads to a very efficient release of benzoic acid, which is suggested to occur by electron transfer and/or proton transfer from the remote phenol moiety to the triplet excited carbonyl. Photolysis of the compound in protic solvents forms a new keto[3,3]paracyclophane.
![Graphical abstract: Solvent assisted photochemical formation of a new keto[3,3]paracyclophane](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D2OB00660J&imageInfo.ImageIdentifier.Year=2022)
H. S. Shin, D. Y. Moon, S. An and B. S. Park, Org. Biomol. Chem., 2022, 20, 4303 DOI: 10.1039/D2OB00660J
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