Shibata, Takanori; Fujimoto, Masako; Hirashima, Hiroyuki; Chiba, Tatsuya; Endo, Kohei published the artcile< Facile synthesis of cyclic polyphenylenes by consecutive inter- and intramolecular cycloadditions of ortho-, meta-, and para-phenylene-tethered triynes>, Formula: C44H40P2, the main research area is cyclic polyphenylene synthesis phenylene tethered triyne.
Consecutive inter- and intramol. [2 + 2 + 2] cycloadditions of various phenylene-tethered triynes were comprehensively studied by using chiral rhodium catalysts. Ortho-Phenylene-tethered triynes gave chiral o,o,o,o-tetraphenylenes in high-to-excellent enantiomeric excess as dimers. Meta-Phenylene-tethered triynes gave chiral o,m,o,m-tetraphenylenes in moderate enantiomeric excess as dimers along with hexaphenylenes as trimers. This is the first synthesis of cis-o,m,o,m-tetraphenylenes; one structure was ascertained by X-ray crystal structure anal. Para-Phenylene-tethered triynes gave o,p,o,p,o,p-hexaphenylenes as trimers along with the formation of o,p,o,p,o,p,o,p-octaphenylenes as tetramers.
Synthesis published new progress about Alkynes Role: RCT (Reactant), RACT (Reactant or Reagent). 139139-93-8 belongs to class chiral-phosphine-ligands, and the molecular formula is C44H40P2, Formula: C44H40P2.
Referemce:
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