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 potentials (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. Surprisingly, the maximum conductivity of the new 3-substituted cationic polymers is lower than that of the N-substituted analogue. Poly[3-(3-bromopropyl)pyrrole] 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.
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 potentials (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. Surprisingly, the maximum conductivity of the new 3-substituted cationic polymers is lower than that of the N-substituted analogue. Poly[3-(3-bromopropyl)pyrrole] 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.
Substituted anilinic piperidines as MCH selective antagonists
申请人:Marzabadi R. Mohammad
公开号:US20070043080A1
公开(公告)日:2007-02-22
This invention is directed to compounds which are selective antagonists for melanin concentrating hormone-1 (MCH1) receptors. The invention provides a pharmaceutical composition comprising a therapeutically effective amount of the compound of the invention and a pharmaceutically acceptable carrier. This invention provides a pharmaceutical composition made by combining a therapeutically effective amount of the compound of this invention and a pharmaceutically acceptable carrier. This invention further provides a process for making a pharmaceutical composition comprising combining a therapeutically effective amount of the compound of the invention and a pharmaceutically acceptable carrier.