Synthetic Route of 1038-95-5, An article , which mentions 1038-95-5, molecular formula is C21H21P. The compound – Tri-p-tolylphosphine played an important role in people’s production and life.
Phosphine-catalyzed chemoselective [2 + 2 + 2] and [3 + 2] annulations of gamma-methyl allenoates with doubly activated olefins have been developed, which afford highly substituted cyclohexanes bearing five continuous stereogenic centers and cyclopentenes bearing three continuous stereogenic centers, respectively, in generally high yields with excellent diastereoselectivity. The [2 + 2 + 2] annulation represents an unprecedented reactivity pattern of gamma-methyl allenoates with activated C-C bonds to access six-membered carbocycles. In addition, the study herein also evidences that the acidic protic additives such as benzoic acid can exert influence on chemoselectivity of phosphine-catalyzed annulation reactions involving allenoates.
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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