In an article, published in an article, once mentioned the application of 1038-95-5, Name is Tri-p-tolylphosphine,molecular formula is C21H21P, is a conventional compound. this article was the specific content is as follows.name: Tri-p-tolylphosphine
Herein, we describe an interesting palladium-catalyzed protocol for the carbonylative synthesis of 3-substituted maleimides. By annulation of simple anilines with terminal alkynes under carbon monoxide pressure, the desired 3-substituted maleimides can be obtained in 50?85% yields. Additionally, with the addition of phosphine ligand, maleic acid isoimide can be obtained from the same substrates as well. With the presence of K2S2O8, the obtained maleic acid isoimide can be completely transformed to the corresponding maleimide. (Figure presented.).
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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate