CuI Catalyst Research Articles

Synthesis of transition metal–poly(yne) polymer possessing chiral acetylene bridges

Treatment of C2-symmetric chiral acetylenes, prepared from (R)-1,1′-bi-2-naphthol, with dichlorobis(trialkylphosphine)-platinum or -palladium in the presence of a CuI catalyst in amine gave high molecular-weight polynuclear complexes, which show a large negative optical rotation.

Intermolecular alkynyl-ligand migration from aryl-palladium(II) to -platinum(II) complexes with and without a CuI catalyst. Reversible transfer of the alkynyl group between copper(I) and palladium(II) complexes

K. Osakada, R. Sakata and T. Yamamoto, J. Chem. Soc., Dalton Trans., 1997, 1265 DOI: 10.1039/A700021I

Comparative evaluation of enantiocontrol for intramolecular cyclopropanation of diazoacetates with chiral CuI, RhII and RuII catalysts

Enantioselectivity for intramolecular cyclopropanation of allylic diazoacetates shows complementarity in comparisons of chiral Cu I , Rh II and Ru II catalysts.

The first sterically regular chiral conjugated crown ether polymer

The coupling of ( S)-6,6′-dibromo-2,2′-binaphtho-20-crown-6 with 1,4-diethynyl-2,5-dioctadecyloxybenzene in the presence of Pd(PPh 3) 4 and CuI catalysts leads to the formation of the first sterically regular chiral conjugated crown ether polymer. This polymer is soluble in organic solvents. GPC analysis shows that the molecular weight of this polymer is M w = 10,500 and M n = 5,300 (PDI = 2.0). [ α] D = 120.9 (c = 0.95, THF). Another soluble crown ether polymer has also been made from the racemic binaphthyl monomers. Its molecular weight is M w = 27,900 and M n = 11,500 (PDI = 2.4).

Syntheses and Properties of Ferrocenylethynyl Transition Metal Complexes of Platinum, Palladium, and Nickel

Abstract Square planar ferrocenylethynyl transition metal complexes M(C≡CFc)2(PR3)2 (M = Pt, Pd, Ni; Fc = (C5H4)Fe(C5H5)) were prepared by the reaction of MCl2(PR3)2 with ethynylferrocene in the presence of a CuI catalyst in diethylamine, and characterized by spectral analyses. An interaction between transition metals and an iron atom was studied by using electronic spectroscopy.