1206455-31-3Relevant articles and documents
Five nitrogen oxidation states from nitro to amine: Stabilization and reactivity of a metastable arylhydroxylamine complex
Zsombor-Pindera, Joseph,Effaty, Farshid,Escomel, Léon,Patrick, Brian,Kennepohl, Pierre,Ottenwaelder, Xavier
, p. 19023 - 19028 (2020)
Redox noninnocent ligands enhance the reactivity of the metal they complex, a strategy used by metalloenzymes and in catalysis. Herein, we report a series of copper complexes with the same ligand framework, but with a pendant nitrogen group that spans five different redox states between nitro and amine. Of particular interest is the synthesis of a unprecedented copper(I)-arylhydroxylamine complex. While hydroxylamines typically disproportionate or decompose in the presence of transition metal ions, the reactivity of this metastable species is arrested by the presence of an intramolecular hydrogen bond. Two-electron oxidation yields a copper(II)-(arylnitrosyl radical) complex that can dissociate to a copper(I) species with uncoordinated arylnitroso. This combination of ligand redox noninnocence and hemilability provides opportunities in catalysis for two-electron chemistry via a one-electron copper(I/II) shuttle, as exemplified with an aerobic alcohol oxidation.
Novel asymmetrically functionalized bis-dipicolylamine metal complexes: Peripheral decoration of a potent anion recognition scaffold
Drewry, Joel A.,Fletcher, Steven,Hassan, Haider,Gunning, Patrick T.
supporting information; experimental part, p. 5074 - 5077 (2010/04/04)
We report the design and synthesis of a novel class of asymmetrically functionalized, ditopic bis-dipicolylamine (BDPA) ligands. A key feature of this research involved the controlled, sequential functional group decoration of a potent molecular recognition scaffold. Calorimetric screening identified a BDPA analogue as a highly potent (Ka～ 106 M-1) and selective sensor for inorganic phosphate.
