106995-39-5Relevant academic research and scientific papers
Cyclometallated gold(III) complexes as effective catalysts for synthesis of propargylic amines, chiral allenes and isoxazoles
Kung, Karen Ka-Yan,Lo, Vanessa Kar-Yan,Ko, Hok-Ming,Li, Gai-Li,Chan, Pui-Ying,Leung, King-Chi,Zhou, Zhongyuan,Wang, Ming-Zhong,Che, Chi-Ming,Wong, Man-Kin
, p. 2055 - 2070 (2013/08/23)
A series of cyclometallated gold(III) complexes [Au(CN)Cl2] 1a-l (HCN=arylpyridines) and a PEG-linked complex 1m were synthesized. Complexes 1a-m are effective in catalyzing the synthesis of propargylic amines, chiral allenes and isoxazoles. Six-membered ring cyclometallated gold(III) complexes 1f-l exhibited higher catalytic activity than five-membered ring cyclometallated gold(III) complexes 1a-e. The diastereoselectivity of propargylic amines could be tuned by using chiral aldehyde and/or amine substrates. Excellent enantioselectivities (90-98% ee) were achieved in chiral allene synthesis. Chiral allene racemization could be minimized by using 1f as catalyst. The PEG-linked catalyst 1m is the most catalytically active towards synthesis of propargylic amines, in which case a product turnover of 900 was achieved. Moreover, 1m could be repeatedly used for 12 reaction cycles, leading to an overall turnover number of 872. Copyright
Mercury(II) and gold(III) derivatives of 2-phenyl pyridines and 2-phenyl-4-(methylcarboxylato)quinoline
Parish,Wright, Jonathan P.,Pritchard, Robin G.
, p. 165 - 176 (2007/10/03)
ortho-Mercurated derivatives of several substituted 2-phenylpyridines and of 2-phenyl-4-(methylcarboxylato)quinoline have been prepared and characterised. C,N-chelated gold(III) derivatives, [AuCl2(C6H4C5H3RN)] (R = H, 3-Me, 3,5-Me2, 4-Prn, 4-But) are prepared more efficiently by trans-metallation reactions than by direct reaction of AuCl4- with the phenylpyridines. The new gold complexes were characterised spectroscopically and a variety of substitution reactions have been effected. As is usual with unsymmetrical bidentate ligands, the softer donor atom is found trans to the N-donor of the pyridine unit. Crystal-structure determinations are reported for [Au(OAc)(pmpy)(py)]ClO4, [Au(ppy)(dpbt)]BPh4, [Au(ppy)(S2CNMe2)]BPh4 and AuCl(pqcm)2 [Hppy = 2-phenylpyridine, Hpmpy = 2-phenyl-3-methylpyridine, Hpqcm = 2-phenyl-4-(methylcarboxylato)quinoline].
2-Pyridyl- and Quinolin-2-yl-functionalised Organyltellurium Ligands. The Stabilisation of Diorganyl Tritellurides. The Crystal and Molecular Structures of 2-(2-Pyridyl)phenyltellurium(IV) Tribromide, Dimethyldithiocarbamatotellurium(
Al-Salim, Najih,West, Antony A.,McWhinnie, William R.,Hamor, Thomas A.
, p. 2363 - 2372 (2007/10/02)
The syntheses and spectroscopic data (13C n.m.r.) for some new organyltellurium ligands are described.Thus trans metallation of 2-(2-pyridyl)phenyl- (R) or 2-(quinolin-2-yl)phenyl- (R') mercury(II) chloride with TeBr4 gives the organyltellurium tribromide
BIS(2-(2-PYRIDYL)PHENYL)TRITELLURIDE - SYNTHESIS AND CRYSTAL STRUCTURE
Hamor, Thomas A.,Al-Salim, Najih,West, Antony A.,Mcwhinnie, William R.
, p. C5 - C7 (2007/10/02)
The synthesis and molecular structure of bis(2-(2-pyridyl)phenyl)tritelluride are described.There is a short Te...N non-bonded interaction of 2.554(7) Angstroem, which may be responsible for the stability of the molecule.The tritelluride can be converted
