Abstract
The inside cover picture illustrates that starting from 2-alkynyl diaryl sulfides, intramolecular cyclization realized selective construction of sulfur-containing five to seven-membered systems by the choice of reaction temperature and aryl group using the same iridium catalysis. When 2-alkynylphenyl “naphthyl” sulfides were used, triaryl-fused thiepines possessing a 7-membered ring were obtained at 100 °C. The reaction of 2-alkynyl diaryl sulfides at 120 °C gave 9-arylidene-9H-thioxanthenes with 6-membered system. The reaction of 2-alkynylphenyl “naphthyl” sulfides at 160 °C afforded diaryl-substituted benzothiophene with 5-membered system. Details can be found in the communication by Takanori Shibata and co-workers (T. Shibata, T. Iwaki, M. Ito, Adv. Synth. Catal. 2022, 364, 3472–3476; DOI: 10.1002/adsc.202200565).
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