60545-30-4Relevant academic research and scientific papers
ALIPHATIC-AROMATIC HETEROCYCLIC COMPOUNDS AND USES THEREOF IN METAL EXTRACTANT COMPOSITIONS
-
Paragraph 0112-0113, (2016/09/26)
The invention relates to an aliphatic-aromatic heterocyclic compound A which comprises at least two heterocyclic rings B and C, to a metal extractant composition E comprising this aliphatic-aromatic heterocyclic compound A and an organic acid D having at least one carboxylic, sulfonic, sulfuric, phosphinic, phosphonic, or phosphoric acid group, and to a process to extract one or more metals M selected from the group consisting of Ni and Co from an aqueous acidic leach solution PL comprising ions of at least one of the metals M, and further, at least one kind of further ions selected from the group consisting of Fe ions, Al ions, Cu ions, Mg ions, Mn ions, and also silicate anions, by mixing the solution PL with an extractant composition E, separating the organic and aqueous phases, and recovering the metal M from the separated organic phase.
Nickel-catalyzed site-selective amidation of unactivated C(sp 3)-H bonds
Wu, Xuesong,Zhao, Yan,Ge, Haibo
, p. 9530 - 9533 (2014/08/18)
Intramolecular dehydrogenative cyclization of aliphatic amides was achieved on unactivated sp3 carbon atoms by a nickel-catalyzed C-H bond functionalization process with the assistance of a bidentate directing group. The reaction favors the C-H bonds of β-methyl groups over the γ-methyl or β-methylene groups. Additionally, a predominant preference for the β-methyl C-H bonds over the aromatic sp2 C-H bonds was observed. Moreover, this process also allows for the effective functionalization of benzylic secondary sp3 C-H bonds. β-Lactams from nickel catalysis: Intramolecular dehydrogenative cyclization of aliphatic amides was achieved on unactivated sp3 carbon atoms by a nickel-catalyzed C-H bond functionalization process with the assistance of a bidentate directing group (see scheme).
