Syntheses of Families of Enantiopure and Diastereopure Cobalt Catalysts Derived from Trications of the Formula [Co(NH<sub>2</sub>CHArCHArNH<sub>2</sub>)<sub>3</sub>]<sup>3+</sup>
作者:Subrata K. Ghosh、Kyle G. Lewis、Anil Kumar、John A. Gladysz
DOI:10.1021/acs.inorgchem.6b03042
日期:2017.2.20
than Δ-(S,S)-13+3Cl–, and the latter is more stable than Λ-(S,S)-13+3ClO4–. Additional anion metatheses lead to large families of lipophilic salts Λ- and Δ-(S,S)-13+2X–X′– [X/X′ = Cl/BArf [BArf = B(3,5-C6H3(CF3)2)4], PF6/BArf, BF4/BArf, PhBF3/BArf, Cl/BArf20 [BArf20 = B(C6F5)4], BArf/BArf, BArf20/BArf20, BF4/BF4, PF6/PF6]. Mixed salts of the formula Λ- and Δ-[Co((S,S)-NH2CHArCHArNH2)3]3+2Cl–BArf– are similarly
CoX 2(X = OAc,Cl)或Co(ClO 4)2与(S,S)-1,2-二苯基乙二胺[(S,S)-dpen]在CH 3 OH中的需氧反应,然后是HCl或HClO 4个添加,得到非对映异构的盐疏脂Λ-[CO((小号,小号)-DPEN)3 ] 3+ 3CL - [Λ-(小号,小号) - 1 3+ 3CL - ]或Δ-(小号,小号) - 1 3+ 3ClO 4–(60–65%)具有高选择性。阴离子复分解(室温)和equilibrations(木炭,CH 3 OH,70℃)表明,前者比Δ-(更稳定的小号,小号) - 1 3+ 3CL - ,而后者比Λ-更稳定(小号,小号) - 1 3+ 3ClO 4 - 。附加阴离子复分解导致亲脂性盐Λ-和Δ-(的大家族小号,小号) - 1 3+ 2X - X' - [X / X'= CL / BAR ˚F [巴˚F = B(3,5-C6 H 3(CF 3)2)4