Progress in Co-Catalyzed C-H Amination

Abstract

Amino compounds have a wide range of applications in the fields of organic chemistry, medicinal chemistry and functional materials. The efficient construction of C-N bonds has important research significance. Conventional amination reactions to construct C-N bonds require pre-functionalization of the substrate and inevitably produce quantitative halogenate by-products. The C-H amination reaction is directly based on hydrocarbons. The reaction has the advantages of "step" and "atomic" economy, in line with the green chemistry concept. Transition metal cobalt has the advantage of low toxicity and low cost. As a catalyst for C-H amination reaction, it exhibits its unique catalytic properties and attracts the attention of chemists. The research progress of cobalt-catalyzed C-H amination in recent years is summarized. At the same time, the challenges and development prospects of the research field are summarized and forecasted.

Basic Characterization and Sputtering Processing of Diatom‐Based Anode Materials

“…Similarly, the spectrum analysis of Ti sample(Figure S2): the main elements include Ti, O, C and F, while the photoelectron peak of Si is not obvious, and it is speculated that the coating is effective [26] . Moreover, according to the peak separation and calibration: Ti is completly oxidated to TiO 2 ; Photoelectron peak strength of Si is weak, but still can be observed clearly, while the relative atom content of Si2p(SiO 2 ) is only 0.45 %.…”

Oxidative coupling of primary amines to imines catalyzed by CoCl2·6H2O

“…As an earth-abundant, non-toxic and low-cost metal, cobalt has been extensively used as a catalyst in organic syntheses for different reaction systems, such as the industry-scale Fischer-Tropsch process, [27,28] hydroformylation of olefins, [29] hydrogenation, hydroboration, hydrosilylation, [30] and C-H bond functionalization. [31][32][33] Except for a few cobalt complexes, [34][35][36] the cobalt salts are rarely used for the catalytic oxidative coupling of amines.…”