Synthesis and Structural Characterization of Nickel Complexes Posssing P-Stereogenic Pincer Scaffolds and Their Application in Asymmetric Aza-
Michael Reactions害羞草图片
期刊名称： Organometallics
作者： Yang, Zehua,Liu, Delong,Liu, Yangang,Sugiya, Masashi,Imamoto,
信贷资产证券化Tsuneo,Zhang, Wanbin
肺动脉楔压年份： 2015年
油泼面的做法
期号： 第7期figuring
摘要：Novel P-stereogenic pincer-Ni complexes {κP,κC,κP-3,5-Me2-2,6-(MetBuPCH2)2C6H}NiCl (3), {κP,κC,κP-3,5-Me2-2,6-(MetBuPCH2)2C6H}NiOTf (4), [{κP,κN,κP-2,6-(MetBuPCH2)2C5H3N}NiCl]Cl (7), [{κP,κN,κP-2,6-
(MetBuPCH2)2C5H3N}NiCl]BF4 (8), and [{κP,κN,κP-2,6-
感恩母校作文(MetBuPCH2)2C5H3N}Ni(NCMe)](BF4)2 (9) were synthesized in 55–84% yields and characterized by 1H NMR, 13C{1H} NMR, 31P{1H} NMR, 19F{1H} NMR, and/or
single-crystal X-ray diffractions. The ORTEP diagrams of complexes 3, 7, 8, and 9 show that the coordination geometries around the Ni center in all the structures are approximately square planar but have different bond lengths and angles. The complexes were shown to be active catalysts for the asymmetric aza-Michael addition of α,β-unsaturated nitriles. For most examples good to excellent yields (up to 99%)
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