In 2022,Wu, Yaxing; Wu, Chao; Wang, Fei; Chen, Chao published an article in New Journal of Chemistry. The title of the article was 《Cu-catalyzed [2 + 2 + 1] cascade annulation of vinyl iodonium salts with elemental sulfur/selenium for the modular synthesis of thiophenes and selenophenes》.Product Details of 2510-22-7 The author mentioned the following in the article:
A [2 + 2 + 1] annulation protocol was established for the modular synthesis of 2,4-disubstituted thiophenes/selenophenes, with excellent regioselectivity. The reactions was catalyzed by copper salt with elemental sulfur and selenium serving as the chalcogen source. The mechanistic study was revealed that this process was initiated by a trisulfur radical anion using EPR. In the experimental materials used by the author, we found 4-Ethynylpyridine(cas: 2510-22-7Product Details of 2510-22-7)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Product Details of 2510-22-7