Tunable dendritic ligands of chiral 1,2-diamine and their application in asymmetric transfer hydrogenation
作者:Weiguo Liu、Xin Cui、Linfeng Cun、Jin Zhu、Jingen Deng
DOI:10.1016/j.tetasy.2005.07.008
日期:2005.8
synthesized via direct N-mono-sulfonylization of the chiral dendritic vicinaldiamines and their ruthenium complexes demonstrated high catalytic and recyclable activities with comparable enantioselectivities to Noyori–Ikariya’s TsDPEN-Ru in the asymmetric transfer hydrogenation of an extended range of substrates, such as ketones, keto esters, and olefins.
The asymmetric transferhydrogenation of activated olefins with chiralruthenium amido complexes (Noyori catalyst) using formic acid–triethylamine azeotrope as hydrogen source resulted in excellent yields and high enantioselectivities (up to 88.5%).
A new and effective method for providing optically active monosubstituted malononitriles: selective reduction of α,β-unsaturated dinitriles catalyzed by copper hydride complexes
作者:Yunlai Ren、Xianlun Xu、Kunpeng Sun、Jian Xu
DOI:10.1016/j.tetasy.2005.11.013
日期:2005.12
A copper hydride complex, which was generated in situ from CuOt-Bu, BINAP, and PhSiH3, was found to be a highly effective catalyst for the reduction of the CC of α,β-unsaturated dinitriles. In addition to CuOt-Bu, some air and moisture stable Cu salts were also effective as catalyst precursors in this reduction. Herein, we have developed an effective method for providing opticallyactive monosubstituted
发现由CuO t -Bu,BINAP和PhSiH 3原位生成的氢化铜配合物是降低α,β-不饱和二腈CC的高效催化剂。除了CuO t -Bu以外,一些空气和水分稳定的Cu盐在这种还原反应中也有效用作催化剂前体。在此,我们已经开发出一种有效的方法来提供光学活性的单取代的丙二腈。
BABA NAOMISNI; MAKINO TAKETOSNI; ODA JUNISN; INOUUE YUZO, BULL. INST. CHEM. RES. KYOTO UNIV., 1980, 58, NO 3, 386-389
作者:BABA NAOMISNI、 MAKINO TAKETOSNI、 ODA JUNISN、 INOUUE YUZO
DOI:——
日期:——
Transfer Hydrogenation of Activated CC Bonds Catalyzed by Ruthenium Amido Complexes: Reaction Scope, Limitation, and Enantioselectivity
作者:Dong Xue、Ying-Chun Chen、Xin Cui、Qi-Wei Wang、Jin Zhu、Jin-Gen Deng
DOI:10.1021/jo0478205
日期:2005.4.1
diamine−Ru(II)−(arene) systems was investigated to explore the asymmetric transfer hydrogenation of prochiral α,α-dicyanoolefins. Two parameters had been systematically studied, (i) the structure of the N-sulfonylated chiral diamine ligands, in which several chiral diamines substituted on the benzene ring of DPEN were first reported, and (ii) the structure of the metal precursors, and high enantioselectivitiy (up to