Embedding an Allylmetal Dimer in a Chiral Cavity: The Unprecedented Stereoselectivity of a Twofold Wittig [1,2]-Rearrangement
作者:Manfred Schlosser、Frédéric Bailly
DOI:10.1021/ja066462f
日期:2006.12.1
alpha'-dimetalation, both 2,2'-diallyloxy-1,1'-binaphthyl and 2,2'-di-2-methylallyloxy-1,1'-binaphthyl undergo the Wittig rearrangement with perfect diastereoselectivity. When racemic 1,1'-binaphthyl-2,2'-diol ("BINOL") is used as the starting material, it gives rise to a 1:1 mixture of antipodal stereoisomers, whereas enantiomerically pure (M)-2,2'-diallyloxy-1,1'-binaphthyl affords (M)-(S,S)-1,1-(1,1'-binaphthyl-2
Synthesis of hydroquinone-, biphenol-, and binaphthol-containing aza macroheterocycles via regioselective hydroformylation and reductive amination
作者:Goran Angelovski、Peter Eilbracht
DOI:10.1016/j.tet.2003.08.012
日期:2003.10
Rhodium(I) catalyzed regioselective hydroformylation of diolefins and subsequent reductive amination of the dialdehydes in the presence of α,ω-diamines is applied to azamacroheterocyclic ring synthesis. Starting from aromatic diallyl ethers of hydroquinone, biphenol and binaphthol 20–28 membered macroheterocycles were obtained in up to 78% yield.
Fluorescence screening of tartaric acid-derived azamacrocycles synthesized via sequential hydroformylation/reductive amination as potential ligands for asymmetric catalysis
作者:Goran Angelovski、Mark D. Keränen、Peter Eilbracht
DOI:10.1016/j.tetasy.2005.03.035
日期:2005.6
Azamacrocycles containing a tartaric acid-derived unit and aryl units were synthesized via rhodium-catalyzed hydroformylation while the subsequent reductiveamination was carried out in a tandem or stepwise fashion. Upon fluorescence emission experiments, some of the macrocycles showed chelating affinities toward transition metals such as zinc or rhodium.