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The synthesis of novel adamantane-like cage compounds consisting of phosphorus, sulfur, and carbon atoms was developed. We examined the reaction of a variety of acetophenone derivatives with P4S10 in refluxing benzene. A novel noradamantane-like cage compound was also synthesized, when the reaction of 2'-methoxyacetophenone with P4S10 was performed in refluxing toluene. In addition, by using the adamantane-like cage compound, 4,4'dimethoxybenzophenone and N,N-dimethylbenzamide were successfully transformed into the corresponding thioketone (98%) and benzothioamide (89%), respectively.

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