Provide that a useful catalyst for homogeneous hydrogenation, particularly a catalyst for homogeneous asymmetric hydrogenation for hydrogenation, particularly asymmetric hydrogenation, which is obtainable with comparative ease and is excellent in economically and workability, and a process for producing a hydrogenated compound of an unsaturated compound, particularly an optically active compound using said catalyst with a high yield and optical purity.
Diamine preparation for synthesis of a water soluble Ni(II) salen complex
作者:Jason M. Shearer、Steven E. Rokita
DOI:10.1016/s0960-894x(99)00020-7
日期:1999.2
reacted with 1,4-dimethylpiperazine-2,3-dione to form the symmetric alpha-dione. This material was then converted to its dioxime and reduced by TiCl4/NaBH4 to yield the meso-diamine. Condensation of the diamine and salicyladehyde, coordination of nickel and final methylation generated the desired water soluble and redox active complex.
Provide that a useful catalyst for homogeneous hydrogenation, particularly a catalyst for homogeneous asymmetric hydrogenation for hydrogenation, particularly asymmetric hydrogenation, which is obtainable with comparative ease and is excellent in economically and workability, and a process for producing a hydrogenated compound of an unsaturated compound, particularly an optically active compound using said catalyst with a high yield and optical purity.
Provide that a useful catalyst for homogeneous hydrogenation, particularly a catalyst for homogeneous asymmetric hydrogenation for hydrogenation, particularly asymmetric hydrogenation, which is obtainable with comparative ease and is excellent in economically and workability, and a process for producing a hydrogenated compound of an unsaturated compound, particularly an optically active compound using said catalyst with a high yield and optical purity.
Reductive coupling of aromatic oxims and azines to 1,2-diamines using Zn-MsOH or Zn-TiCl 4
作者:Naoki Kise、Nasuo Ueda
DOI:10.1016/s0040-4039(01)00178-2
日期:2001.3
The reduction of aromatic aldoxims and azines with Zn in the presence of MsOH or TiCl4 afforded N.N'-unsubstituted 1,2-diamines in one-step. The reductive coupling with Zn-MsOH gave meso 1,2-diamines selectively, whereas cll 1,2-diamines were formed selectively by the reduction with Zn-TiCl4. (C) 2001 Elsevier Science Ltd. All rights reserved.