The reaction of 5-phenylpenta-2,4-dienoic acid with benzene in CF3SO3H, depending on the reaction conditions, gives three products, namely, 5,5-diphenylpent-2-enoic acid and tetralone and indanone derivatives. These carbocyclic compounds are formed through the addition of two benzene molecules to the starting diene acid and subsequent intramolecular acylation.

中文翻译：

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5-苯基五-2,4-二烯酸与苯在三氟甲磺酸中的反应

5-苯基戊-2,4-二烯酸与苯在CF3SO3H 中的反应，取决于反应条件，得到三种产物，即5,5-二苯基戊-2-烯酸和四氢萘酮和茚满酮衍生物。这些碳环化合物是通过将两个苯分子添加到起始二烯酸中并随后进行分子内酰化而形成的。