Yoshida, Tomoka; Tajima, Yuki; Kobayashi, Masayuki; Masutomi, Koji; Noguchi, Keiichi; Tanaka, Ken published the artcile< Rhodium-Catalyzed [3+2+2] and [2+2+2] Cycloadditions of Two Alkynes with Cyclopropylideneacetamides>, Electric Literature of 139139-93-8, the main research area is cycloheptadiene diastereoselective preparation rhodium catalyst reaction mechanism; spiro cyclohexadiene stereoselective preparation rhodium catalyst reaction mechanism; alkyne unsaturated ketone cycloaddition; asymmetric catalysis; cycloaddition; heterocycles; rhodium; synthetic methods.
A cationic rhodium(I)/H8-binap complex catalyzed the [3+2+2] cycloaddition of 1,6-diynes with cyclopropylideneacetamides which produced cycloheptadiene derivatives, e.g., I, through cleavage of cyclopropane rings. A cationic rhodium(I)/(S)-binap complex catalyzed the enantioselective [2+2+2] cycloaddition of terminal alkynes, acetylenedicarboxylates, and cyclopropylideneacetamides which produced spiro-cyclohexadiene derivatives, e.g., II, which retained the cyclopropane rings.
Angewandte Chemie, International Edition 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, Electric Literature 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