1030840-72-2Relevant academic research and scientific papers
Enantioselective construction of bridged multicyclic skeletons: Intermolecular [2+2+2] cycloaddition/intramolecular diels-alder reaction cascade
Kobayashi, Masayuki,Suda, Takeshi,Noguchi, Keiichi,Tanaka, Ken
supporting information; experimental part, p. 1664 - 1667 (2011/03/22)
Bridging a gap: A cationic rhodium(I)/ligand complex catalyzes the title reaction of alkynes and amide-linked 1,5-dienes, leading to bridged multicyclic compounds, with high chemo-, regio-, and enantioselectivity (see scheme; Bn=benzyl).
Commercially available liquid enol ethers and acetates as gaseous alkyne equivalents in cationic Rh(I)/BINAP-catalyzed chemo- and regioselective formal cross-alkyne cyclotrimerizations
Hara, Hiromi,Hirano, Masao,Tanaka, Ken
scheme or table, p. 5093 - 5101 (2009/12/01)
A cationic rhodium(I)/BINAP complex catalyzes partial intramolecular [2+2+2] cycloadditions of 1,6- and 1,7-diynes with enol ethers or a ketene acetal giving substituted benzenes in good yields. The same catalyst also catalyzes complete intermolecular [2+
Liquid enol ethers and acetates as gaseous alkyne equivalents in Rh-catalyzed chemo- and regioselective formal cross-alkyne cyclotrimerization
Hara, Hiromi,Hirano, Masao,Tanaka, Ken
supporting information; experimental part, p. 2537 - 2540 (2009/05/11)
(Chemical Equation Presented) A cationic rhodium(I)/rac-BINAP complex catalyzes chemo- and regioselective formal cross-cyclotrimerizations of alkynes with enol ethers or acetates. Commercially available and cheap liquid enol ethers and acetates could be used as convenient gaseous alkyne equivalents in the present rhodium catalyses.
Enantioselective synthesis of α,α-disubstituted α-amino acids by Rh-catalyzed [2+2+2] cycloaddition of 1,6-diynes with protected dehydroamino acid
Tanaka, Ken,Takahashi, Maho,Imase, Hidetomo,Osaka, Takuya,Noguchi, Keiichi,Hirano, Masao
, p. 6289 - 6293 (2008/09/21)
We have determined that a cationic rhodium(I)/BINAP complex catalyzes a [2+2+2] cycloaddition of 1,6-diynes with a protected dehydroamino acid, leading to protected α-amino acids bearing a quaternary carbon center in high yield with high enantioselectivity.
