title: Catalytic reduction of pralidoxime in pharmaceuticals by macrocyclic Ni(II) compounds derived from orthophthalaldehyde.
abstract: Efficient catalytic method for the reduction of pralidoxime to its amine derivative by macrocyclic Ni(II) compounds has been developed. Ten macrocyclic Schiff base Ni(II) compounds were synthesized via non-template synthesis by treating the corresponding macrocycles with nickel chloride in 1:1 ratio. The resulting compounds were characterized by elemental, IR, (1)H NMR, (13)C NMR, mass, electronic spectra, conductance, magnetic, thermal studies and their structures have been proposed. These compounds were used as catalysts for the reduction of pralidoxime to its amino derivative. The reduced pralidoxime was also characterized by spectral analysis and catalytic cycle has been established. The reduced product was determined spectrophotometrically by treating with ninhydrin reagent and the percent yields were found to be in the range of 75.12-82.36%.
authors: Department of Chemistry, Kakatiya University, Warangal 506009, India.
authors: P Muralidhar
authors: PM
authors: Reddy
authors: Adapa V S S
authors: AV
authors: Prasad
authors: Rondla
authors: R
authors: Rohini
authors: Vadde
authors: V
authors: Ravinder
mesh_terms: D002384:Catalysis; D004553:Electric Conductivity; D004583:Electrons; D047028:Macrocyclic Compounds / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008280:Magnetics; D013058:Mass Spectrometry; D009532:Nickel / Q000737:chemistry*; D009555:Ninhydrin / Q000737:chemistry; D010084:Oxidation-Reduction; D004364:Pharmaceutical Preparations / Q000737:chemistry*; D011220:Pralidoxime Compounds / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013696:Temperature; D009764:o-Phthalaldehyde / Q000737:chemistry*
chemical_list: D047028:Macrocyclic Compounds; D004364:Pharmaceutical Preparations; D011220:Pralidoxime Compounds; D009764:o-Phthalaldehyde; D009532:Nickel; D009555:Ninhydrin; C028797:pralidoxime