Shibata, Takanori; Takami, Kyoko; Kawachi, Ai published the artcile< Rh-Catalyzed Enantioselective [2+2] Cycloaddition of Alkynyl Esters and Norbornene Derivatives>, Quality Control of 139139-93-8, the main research area is cyclobutene tetracyclic tricyclic asym synthesis; asym synthesis tricyclononenecarboxylate; rhodium catalyst enantioselective cycloaddition alkynyl ester norbornene.
The enantioselective [2+2] cycloaddition of alkynes possessing an ester functionality, e.g. PhCCCO2Me, and norbornene derivatives proceeded efficiently using a chiral rhodium catalyst. The resulting chiral tri- and tetracyclic cyclobutenes were obtained in moderate to high ee.
Organic Letters published new progress about [2+2] Cycloaddition reaction, stereoselective. 139139-93-8 belongs to class chiral-phosphine-ligands, and the molecular formula is C44H40P2, Quality Control of 139139-93-8.
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