13423-74-0Relevant articles and documents
Cobalt-Nitrenoid Insertion-Mediated Amidative Carbon Rearrangement via Alkyl-Walking on Arenes
Lee, Jeonghyo,Kang, Bora,Kim, Dongwook,Lee, Jia,Chang, Sukbok
supporting information, p. 18406 - 18412 (2021/11/16)
We herein disclose the Cp*Co(III)(LX)-catalyzed amidative alkyl migration using 2,6-disubstituted phenyl azidoformates. Upon the cobalt-nitrenoid insertion toward the substituted ortho carbon, an arenium cationic species bearing a quaternary carbon is generated, and a subsequent alkyl migration process is suggested to occur through an unforeseen alkyl-walking mechanism. A quinolinol ligand of the cobalt catalyst system is proposed to facilitate the final product-releasing rearomatization process by serving as an internal base. This new mechanistic mode enabled both [1,2]- and [1,4]-alkyl rearrangements to allow the structural variation of N-heterocyclic compounds.
Nickel stabilizers and dye enhancers for polyolefins
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, (2008/06/13)
Products of the reaction of about 30 to 90 parts by weight of a compound of formula (I) STR1 wherein R1 and R2 are each alkyl radicals having up to 8 carbon atoms at least one of which is branched on the alpha carbon, and R3 and R4 are each hydrogen or an alkyl radical having up to 18 carbon atoms, and about 70 to 10 parts by weight, respectively, of a secondary or tertiary phosphite are useful for stabilizing polyolefins against degradation by heat and ultraviolet radiation and for rendering polyolefins dyeable by chelatable dyes such as aromatic ortho hydroxy azo dyes.
