Efficient C–H Amination Catalysis Using Nickel-Dipyrrin Complexes
作者:Yuyang Dong、Ryan M. Clarke、Gerard J. Porter、Theodore A. Betley
DOI:10.1021/jacs.0c02126
日期:2020.6.24
multi-nuclear NMR spectroscopy observed during catalysis. The activation parameters (ΔH≠ = 13.4 ± 0.5 kcal/mol; ΔS≠ = -24.3 ± 1.7 cal/mol·K) were measured using Eyring analysis, implying a highly ordered transitionstateduring the HAA step. The proposed mechanism of rapid iminyl formation, rate-determining HAA, and subsequent radical recombination was corroborated by intramolecular isotope labeling experiments
Aerobic/Room‐Temperature‐Compatible
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‐Block Organometallic Chemistry in Neat Conditions: A Missing Synthetic Tool for the Selective Conversion of Nitriles into Asymmetric Alcohols
Under neat conditions: The aerobic and room temperature compatible double addition of s-block organometallic reagents into nitriles, in the absence of any external organic solvent, is reported. Thus, directconversion of nitriles into asymmetric tertiary alcohols is achieved through a one-pot/two-steps modular process, without tedious and energy consuming halfway isolation/purification steps needed
Under neat conditions :报道了在没有任何外部有机溶剂的情况下,s-嵌段有机金属试剂在有氧和室温下相容的双重加成到腈中。因此,通过一锅/两步模块化工艺将腈直接转化为不对称叔醇,无需繁琐且耗能的中途分离/纯化步骤。