Oxidative addition of methyl iodide to dimethylplatinum (II) compounds containing bulky and/or chiral ligands. Crystal structure of compound [PtMe3I{1-(Me2NCH2 CH2NCH)C10H7}]
摘要:
Compound [PtMe2{1-(Me2NCH2CH2NCH)C-10 H-7}] (2a) gave upon reaction with methyl iodide platinum (IV) compound [PtMe3I{1-(Me2NCH2CH2NCH)C10H7}] (3a) as a single isomer which was characterised structurally. Upon standing in solution, two isomers of 3a were detected by H-1 NMR. New chiral compounds [PtMe2(N,N'-chelate)] (N,N' = 2-((S)-CHNCH(Me)C6H5)C9H6N (2b), 2-((R)-CHNCH(Me)C10H7)C5H4N (2c) and 2-((R)-CHNCH(Me)C10H7)C9H6N (2d)) were obtained from [Pt2Me4(mu-SMe2)(2)] and the corresponding diimines. The oxidative addition of methyl iodide to compounds 2b-2d gave two diastereomers each of compounds [PtMe3I(N,N'-chelate)] in nearly equal amounts. All new platinum (II) and platinum (IV) compounds were fully characterised. (C) 2003 Elsevier Ltd. All rights reserved.
Novel N,N-Bidentate Ligands for Enantioselective Copper(I)- Catalyzed Allylic Oxidation of Cyclic Olefins
作者:Qitao Tan、Masahiko Hayashi
DOI:10.1002/adsc.200800457
日期:2008.11.3
New N,N-bidentate Schiff base ligands containing the 2-quinolyl moiety proved to be effective in conferring high reactivity and moderate to high enantioselectivity (up to 84% ee) to the copper(I)-catalyzed asymmetric allylicoxidation of various cylic olefins with tert-butyl perbenzoate. As copper(I) sources, we employed copper(II) triflate/phenylhydrazine [Cu(OTf)2/PhNHNH2] and tetra(acetonitrile)copper
Oxidative addition of methyl iodide to dimethylplatinum (II) compounds containing bulky and/or chiral ligands. Crystal structure of compound [PtMe3I{1-(Me2NCH2 CH2NCH)C10H7}]
Compound [PtMe21-(Me2NCH2CH2NCH)C-10 H-7}] (2a) gave upon reaction with methyl iodide platinum (IV) compound [PtMe3I1-(Me2NCH2CH2NCH)C10H7}] (3a) as a single isomer which was characterised structurally. Upon standing in solution, two isomers of 3a were detected by H-1 NMR. New chiral compounds [PtMe2(N,N'-chelate)] (N,N' = 2-((S)-CHNCH(Me)C6H5)C9H6N (2b), 2-((R)-CHNCH(Me)C10H7)C5H4N (2c) and 2-((R)-CHNCH(Me)C10H7)C9H6N (2d)) were obtained from [Pt2Me4(mu-SMe2)(2)] and the corresponding diimines. The oxidative addition of methyl iodide to compounds 2b-2d gave two diastereomers each of compounds [PtMe3I(N,N'-chelate)] in nearly equal amounts. All new platinum (II) and platinum (IV) compounds were fully characterised. (C) 2003 Elsevier Ltd. All rights reserved.