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2009年04月20日

【期刊论文】Asymmetric hydrocyanation of olefins catalyzed by chiral diphosphite-nickel complexes

鄢明， Ming Yan， Qian-Yong Xu and Albert S. C. Chan*

Tetrahedron: Asymmetry 11(2000)845-849，-0001，（）：

-1年11月30日

摘要

Chiral aryl diphosphite ligands derived from binaphthol were found to be effective in the nickel-catalyzed hydrocyanation of a variety of olefins. Enantioselective hydrocyanations of styrene, 4-substituted styrenes and norbornene were achieved with excellent regioselectivity and moderate enantioselectivity. The hydrocyanation of vinyl acetate gave 72.9% ee. The catalytic activity and the enantioselectivity of the Ni(0)-diphosphite complexes were found to be highly dependent on the structures of the ligands.

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2009年04月20日

【期刊论文】Catalysts with Mixed Ligands on Immobilized Supports. Electronic and Steric Advantages

鄢明， Michael P. Doyle* and Ming Yan， Han-Mou Gau， Erich C. Blossey

Org. Lett., Vol. 5, No.4, 2003，-0001，（）：

-1年11月30日

摘要

Immobilized dirhodium (Ⅱ) catalysts having mixed chiral ligands enhance reactivity (AH) azetidinone) and influence stereoselectivity in cyclopropanation and carbon-hydrogen insertion reactions.