Reference of 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1,3,5,7-Tetramethyl-6-phenyl-2,4,8-trioxa-6-phosphaadamantane, is researched, Molecular C16H21O3P, CAS is 97739-46-3, about Palladium-Catalyzed Carbonylative Cyclization of Terminal Alkynes and Anilines to 3-Substituted Maleimides. Author is Xu, Jian-Xing; Wu, Xiao-Feng.
Palladium-catalyzed carbonylative synthesis of 3-substituted maleimides were discussed. By annulation of simple anilines with terminal alkynes under carbon monoxide pressure, the desired 3-substituted maleimides were obtained in 50-85% yields. Addnl., with the addition of phosphine ligand, maleic acid isoimide were obtained from the same substrates as well. With the presence of K2S2O8, the obtained maleic acid isoimide were transformed to the corresponding maleimide.
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Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics