765869-63-4Relevant academic research and scientific papers
Polypyrrole-Based Anion-Exchange Polymers
Mao, Huanyu,Pickup, Peter G.
, p. 5604 - 5610 (1992)
The preparation and electrochemistry of two polypyrroles with cationic substituents in the 3-position, and a precursor alkyl bromide substituted polymer, are reported.The electrochemical and ion-exchange properties of the new cationic polymers are similar to those of a previously reported N-substituted analogue.However, their lower redox potential (ca. -0.1 V vs SSCE) mean that they become conductive at less oxidizing potentials.This is shown to be advantageous in the catalysis of ascorbate oxidation.The enhanced conductivity at low potentials also greatly accelerates the electrochemistry of electrostatically bound ferrocyanide.Suprisingly, the maximum conductivity of the new 3-substituted cationic polymers is lower than that of the N-substituted analogue.Poly and cationic copolymers formed by its partial reaction with trimethylamine were used to probe the origin of this difference.Swelling of the polymers with electrolyte solution and associated morphological changes appear to be important factors.
Directed Aminomethylation of Pyrrole, Indole, and Carbazole with N,N,N′,N′-Tetramethylmethanediamine
Akhmetova,Bikbulatova,Akhmadiev,Yanybin,Boiko,Kunakova,Ibragimov
, p. 701 - 706 (2018/07/06)
Catalytic aminomethylation of pyrrole and indole with N,N,N′,N′-tetramethylmethanediamine in the presence of 5 mol % of ZrOCl2·8H2O proceeds selectively at the positions 2, 5 of pyrrole and 1, 3 of indole. Carbazole under the same conditions affords 3-formyl-9-aminomethyl derivative. The reaction in the presence of 5 mol % of K2CO3 occurs as monoaminomethylation: for pyrrole at the position 2, for indole at the position 3, and for carbazole at the nitrogen atom of the substrate. Water-soluble 1,1′-(1H-pyrrole-2,5-diyl)bis(N,N-dimethylmethanamine) exhibits a fungistatic activity with respect to phytopathogenic fungi Rhizoctonia solani.
