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2006年11月03日

【期刊论文】Molybdenum(VI) cis-Dioxo Complexes with Chiral Schiff Base Ligands: Synthesis, Characterization, and Catalytic Applications

周向葛， Xiangge Zhou， Jin Zhao， Ana M. Santos， and Fritz E. Kuhn

Z. Naturforsch. 59b, 1223-1228(2004)，-0001，（）：

-1年11月30日

摘要

Three optically active Molybdenum (VI) dioxo complexes with tetrahydro salen and substituted tetrahydro salen derivatives as ligands were synthesized and examined as catalysts for asymmetric epoxidation. Complexes of the type MoO2(L)(Solv) and WO2(L) (L=tridentate, trans-2-aminocyclohexanol derived chiral Schiff base, Solv=alcohol) were prepared and characterized by elemental analysis, NMR and IR spectroscopy. These complexes are applicable as catalysts for olefin epoxidation reactions with tert-butyl hydroperoxide (TBHP) being the oxidizing agent. In case of cis-β-methylstyrene moderate enantiomeric excesses of up to 26% can be reached when the reaction is carried out at 0℃.

Catalysis， Chirality， Epoxidation， Molybdenum， Salen

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2006年11月03日

【期刊论文】Chlorinated Phthalocyanine Iron(II) Complex Catalyzed Oxidation of Alkanes and Alkenes with Molecular Oxygen in the Presence of Acetaldehyde

周向葛， Shun-Ichi Murahashi， *， a， b， Xiang-Ge Zhou， Naruyoshi Komiya a

Synlett 2003, No.3, 321-324，-0001，（）：

-1年11月30日

摘要

Chlorinated phthalocyanine iron (II) complex is an excellent catalyst for the oxidation of alkanes and alkenes with molecular oxygen in the presence of acetaldehyde under O2 (1 atm) at room temperature. The catalyst can be easily separated and reused for the next reaction.

oxidations， molecular oxygen， alkanes， iron phthalocyanine catalyst

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2006年11月03日

【期刊论文】Asymmetric epoxidation catalyzed by Cr(Ⅲ)-binaphthyl Schiff base complexes

周向葛， Zheng-Kai Li a， Lei Liang a， Li Yanga， b， Hua Chena， Xiang-Ge Zhoua， c， *

Journal of Molecular Catalysis A: Chemical 235(2005)108-113，-0001，（）：

-1年11月30日

摘要

A series of chromic complexes with binaphthyl Schiff base as ligands are synthesized. Their catalytic abilities in asymmetric epoxidation and the effects of reaction conditions such as temperature, solvent and additive have also been studied, leading to the highest ee of 65% for 4-chlorostyrene; the reaction seems to involve a Cr(V)-oxo active species.

Chromic complex， Binaphthyl Schiff base， Asymmetric epoxidation

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2006年11月03日

【期刊论文】Asymmetric aldol reactions catalyzed by new spiro diamine derivatives

周向葛， Man Jiang， a， Shou-Fei Zhu， b， Yun Yang， Liu-Zhu Gong， c， Xiang-Ge Zhoua， * and Qi-Lin Zhoub， *

Tetrahedron: Asymmetry 17(2006)384-387，-0001，（）：

-1年11月30日

摘要

Two new organocatalysts derived from L-proline and a novel chiral spiro diamine bearing a C2 symmetric backbone, were introduced for an asymmetric aldol reaction in moderate to good asymmetric induction in up to 76% ee and high yields.

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2006年11月03日

【期刊论文】Amidation of Saturated C-H Bonds Catalyzed by Electron-Deficient Ruthenium and Manganese Porphyrins. A Highly Catalytic Nitrogen Atom Transfer Process

周向葛， Xiao-Qi Yu， Jie-Sheng Huang， Xiang-Ge Zhou， and Chi-Ming Che*

Org. Lett., Vol. 2, No.15, 2000，-0001，（）：

-1年11月30日

摘要

Amidation of a variety of hydrocarbons with PhIdNTs catalyzed by ruthenium and manganese meso-tetrakis(pentafluorophenyl)porphyrins 1 and 2 afforded N-substituted amides in up to 92% yields with good to excellent substrate conversions. By employing catalyst 2, exceptionally high turnovers (up to 2600) were achieved, and the amidations can be effected by directly using PhI(OAc)2/NH2R as amidating reagents; in the case of R) COCF3 a direct amination was realized in up to 90% yield.

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